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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260222T000000
DTEND;TZID=Europe/Paris:20260227T235959
DTSTAMP:20260424T103128
CREATED:20250715T120653Z
LAST-MODIFIED:20260216T141245Z
UID:59369-1771718400-1772236799@www.geotraces.org
SUMMARY:Ocean Sciences Meeting 2026
DESCRIPTION:Don’t miss GEOTRACES at Ocean Sciences 2026! \n\n\n\n(22–27 February in Glasgow\, Scotland\, website) \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nGEOTRACES Programme Highlights\n\n\n\nScroll down for full session details\, booth info\, and special events. \n\n\n\n\n\n\n\n\n\n\n\nMonday\, 23 February\n\n\n\n\n\n\n\n*OB14H – Revising Ocean Silicon Cycle: Pathways\, Stoichiometry and Climate-Carbon Feedback in the Anthropocene (GEOTRACES-related session)📍 Poster Session | 16:00–18:00 | Hall 4 (SEC) | 🔗 See details \n\n\n\n\n\n\n\n\n\n\n\nTuesday\, 24 February\n\n\n\n\n\n\n\n*SCOR Booth: Meet GEOTRACES committee members at the SCOR Booth. 📍Check schedule | SCOR Booth (#97) – OSM Exhibit Hall \n\n\n\n*HE24C –Mercury in Polar Waters: Sources\, Transformations\, and Bioaccumulation in Food Webs (GEOTRACES-related session)📍 Poster Session | 16:00–18:00 | Hall 4 (SEC) | 🔗 See details \n\n\n\n\n\n\n\nWednesday\, 25 February\n\n\n\n\n\n\n\n*SCOR Booth: Meet GEOTRACES committee members at the SCOR Booth. 📍Check schedule | SCOR Booth (#97) – OSM Exhibit Hall \n\n\n\n**Special Demo at SCOR Booth: 2025 GEOTRACES Intermediate Data Product & DOoR data submission portal.📍14:15-15:30 (local time)\, SCOR Booth (#97) – OSM Exhibit Hall \n\n\n\n\n\n\n\n*CB31A – Coastal\, Shelf\, and Island Mass Effects on Trace Element Biogeochemistry in the Ocean (GEOTRACES session)📍 eLightning Session | 08:30–10:00 | Hall 4 | 🔗 See details \n\n\n\n*TH33B – BioGeoSCAPES: Querying the Ocean’s Microbial Life Support System 📍 Town Hall (GEOTRACES-related)  |12:45–13:45 | Alsh SEC | 🔗 See details \n\n\n\n*CB34A – Coastal\, Shelf\, and Island Mass Effects on Trace Element Biogeochemistry in the Ocean (GEOTRACES session)📍 Poster Session | 16:00–18:00 | Hall 4 | 🔗 See details \n\n\n\n\n\n\n\nThursday\, 26 February\n\n\n\n\n\n\n\n*SCOR Booth: Meet GEOTRACES committee members at the SCOR Booth. 📍Check schedule | SCOR Booth (#97) – OSM Exhibit Hall \n\n\n\n*OB44F – Multi-tracer approaches to understanding and quantifying marine biogeochemical processes (GEOTRACES session)📍 Poster Session | 16:00–18:00 | Hall 4 | 🔗 See details \n\n\n\n*SCOR Social Event: Open to all! 📍 18:00–20:00 | Hotel Indigo – Turbine 75 Bar\, 75 Waterloo St. 🔗 Registration required \n\n\n\n\n\n\n\nFriday\, 27 February\n\n\n\n\n\n\n\n*OB51B – Multi-tracer approaches to understanding and quantifying marine biogeochemical processes II (GEOTRACES session)📍 Oral Session | 8h30 – 10h (local time) | Hall 3\, Coral Cove (SEC) | 🔗 See details \n\n\n\n*OB52C – Multi-tracer approaches to understanding and quantifying marine biogeochemical processes III (GEOTRACES session)📍 Oral Session | 10h30 – 12h00 (local time) | Hall 3\, Coral Cove (SEC) | 🔗 See details \n\n\n\n*OB53A – Multi-tracer approaches to understanding and quantifying marine biogeochemical processes IV (GEOTRACES session)📍 Oral Session | 14h00 – 15h30 (local time) | Hall 3\, Coral Cove (SEC) | 🔗 See details \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n***GEOTRACES at the SCOR Booth***\n\n\n\n\n\n\n\n\nMeet GEOTRACES committee members\, the SCOR’s Executive Director and representatives from other SCOR activities at the SCOR Exhibit Booth. \n\n\n\nSpecial demostration: \n\n\n\nLive demo: 2025 Intermediate Data Product & DOoR data submission portal  \n\n\n\n📅 Wednesday\, 25 February 2026🕒 14:15–15:30 (local time)📍 SCOR Booth #97 – OSM Exhibit Hall \n\n\n\n  \n\n\n\nMonday 23 February to Thursday 26 February\, 2026\, 10am to 6pm (Monday 3pm – 6pm only\, Thursday 10am – 3pm only)Booth #97 – OSM Exhibit Hall –  The booth staffing schedules are available here. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n***GEOTRACES and GEOTRACES related sessions***\n\n\n\n\n\n\n\n\n\n*Multi-tracer approaches to understanding and quantifying marine biogeochemical processesFriday\, 27 February 2026\, 8h30 – 15h30 (local time)\, Hall 3\, Coral Cove (SEC) Poster session on Thursday\, 26 February 2026 \n\n\n\nCo-convenersWilliam M Landing\, Florida State UniversityHélène Planquette\, IUEM Institut Universitaire Européen de la Mer\, LEMAR\, CNRSAnne Leal\, Lamont Doherty Earth Observatory at Columbia UniversityDescriptionThere is a long history on the use of multiple tracers to investigate and quantify biogeochemical processes in the oceans\, from the use of carbon\, nutrient and trace element stoichiometries to demonstrate uptake and regeneration processes\, to studies of the microbial impacts on trace element speciation and distributions\, to the coupling of natural radionuclide cycling with particle chemistry to quantify fluxes\, among many others. Our understanding of the rates and mechanisms of trace element and isotope (TEI) input\, biogeochemical cycling\, and removal is improved by multi-tracer data from basin-wide research cruises\, data from more focused process studies\, and synthesis and modeling of these data. In addition to contributions in these topical areas\, we particularly encourage submissions that integrate multiple tracers or isotope systems to provide constraints on biogeochemical processes in the oceans and that highlight the benefits of multi-proxy approaches. \n\n\n\n\n\n*Coastal\, Shelf\, and Island Mass Effects on Trace Element Biogeochemistry in the OceanWednesday\, 25 February 2026\, 8h30 – 10h00 (local time)\, Hall 4\, eLightning Theater 2 (SEC) Poster session on Wednesday\, 25 February 2026 \n\n\n\nCo-convenersDavid González-Santana\, IOCAG Universidad de Las Palmas de Gran CanariaAridane G. González\, IOCAG. Universidad de Las Palmas de Gran CanariaEmilie Le Roy\, IUEM Institut Universitaire Européen de la MerGabriel Dulaquais\, IUEM Institut Universitaire Européen de la Mer \n\n\n\nDescriptionThe marine biogeochemical cycles of trace elements\, their stable isotopes compositions and organic binding ligands are affected by the island mass effects. With terrigenous\, shelf and even glaciogenic inputs\, islands are natural laboratories for studying the importance of lateral fluxes of trace elements\, their impact on the physico-chemical processes and associated biological responses. This session aims to bring together researchers from diverse fields to discuss the latest findings on the biogeochemical processes occurring in the ocean and related to the island and shelf effects\, from the coast to the open ocean. The aim is to improve our knowledge\, identify biogeochemical impacts\, and characterise physico-chemical speciation of metals and redox chemistry. We welcome research studies and experiments focusing on processes affecting trace metal chemistry\, the nutrient cycle and organic ligands. \n\n\n\n\n\n*Mercury in Polar Waters: Sources\, Transformations\, and Bioaccumulation in Food WebsPoster session: Tuesday\, 24 February 2026\, 16:00 – 18:00 (local time)\, Hall 4 (Poster Hall) (SEC) \n\n\n\nCo-convenersEmily Seelen\, University of Alaska FairbanksMarissa Despins\, University of California Santa CruzStephen Kohler\, Norwegian University of Science and TechnologyMarissa Despins\, University of California Santa Cruz \n\n\n\nDescriptionHigh latitude environments are undergoing profound changes driven by climate warming. The impact of this change–sea ice loss\, permafrost thaw\, and shifting ocean circulation–is expected to alter the concentration and distribution of mercury (Hg) in polar marine waters. While models indicate that Hg concentrations will rise in the Arctic under current emission climate scenarios\, the processes influencing Hg mobility and speciation remain poorly understood\, especially in the Antarctic\, where data is even more limited. To accurately model the fate of Hg in a warming climate and risk for human exposure\, it is imperative that we understand the mechanisms governing Hg cycling\, particularly methylation and demethylation pathways\, which still remain elusive. This session invites contributions that explore the biogeochemical cycling of Hg in both the Arctic and Antarctic\, with a focus on the release and delivery of Hg species to coastal zones\, processes that influence Hg transformations\, and bioaccumulation in marine food webs. Interdisciplinary perspectives that incorporate Indigenous knowledge and community-based monitoring are also encouraged\, as are studies addressing the vulnerability of subsistence-dependent communities to changing Hg exposure. \n\n\n\n\n\n*Revising Ocean Silicon Cycle: Pathways\, Stoichiometry and Climate-Carbon Feedback in the AnthropocenePoster session: Monday\, 23 February 2026 \n\n\n\nCo-convenersDiksha SharmaHaimanti Biswas\, CSIR-National Institute of OceanographyDamien Cardinal\, Sorbonne UniversitéShaily Rahman\, University of Colorado Boulder \n\n\n\nDescriptionSilicon (Si)\, the second most abundant element in Earth’s crust\, is an essential nutrient for marine organisms (phytoplankton\, sponges\, radiolarians) and plays crucial roles in marine carbon cycling and ecosystems and\, atmospheric CO2 inventory. The ocean receives Si from different sources\, including continental erosion (riverine and groundwater discharge\, glacial meltwaters…)\, sedimentary recycling (reverse weathering\, diagenesis…)\, hydrothermal input\, and atmospheric deposition. However\, anthropogenic activities significantly alter Si supply to the ocean: damming restricts the riverine input of Si\, while climate-induced ocean stratification limits vertical mixing\, curtailing Si supply to surface waters. Contrarily\, increasing nitrogen (N) and phosphorus (P) inputs to the coastal areas are disrupting the Redfieldian Si:N:P stoichiometry\, causing a regional shift from siliceous to non-siliceous species\, impacting carbon export and trophic dynamics. Understanding how climate-driven changes—such as enhanced weathering\, glacial melt\, dust input\, and deep-sea geochemical processes—reshape the marine Si cycle is critical for predicting shifts in elemental cycling\, phytoplankton community structure\, and carbon storage. This interdisciplinary session explores evolving Si fluxes across ocean’s interfaces and their biogeochemical impacts\, encouraging studies using isotopic tracers\, omics\, satellite products\, and coupled Earth system models\, to identify hidden fluxes\, feedbacks\, and vulnerabilities in the Si cycle under changing oceanic state. \n\n\n\n*BioGeoSCAPES: Querying the Ocean’s Microbial Life Support SystemTown Hall event: Wednesday\, 25 February 2026 \n\n\n\nDescription:Earth’s life support system is underpinned by the activity of marine microbes that mediate biogeochemical cycles. BioGeoSCAPES is a community-led international effort that aims to address fundamental gaps in the mechanistic understanding of how the ocean ensemble of microbes and their  biochemical reactions shape nutrient biogeochemical cycles and are in turn influenced by these cycles. BioGeoSCAPES involves multiple scales of study\, combining integrated biological and chemical sampling with analytical techniques\, computational biology and ocean modelling. The resulting scientific efforts will deliver a coordinated and improved understanding of the structure and function of our planet’s oceans. \n\n\n\nThe town hall will report on: 1) Progress in developing the BioGeoSCAPES Science Plan\, including the science themes and international implementation strategy. 2) Upcoming webinars\, workshops and BioGeosSCAPES-related research activities and 3) Education and training activities\, including the launch of two cohorts of a BioGeoSCAPES ECR Fellows program; upcoming\, webinars\, workshops and plans for a summer school. The town hall will disseminate information\, build community engagement\, and gather feedback on BioGeoSCAPES progress and plans. The target audience includes marine microbiologists\, biogeochemists\, physiologists\, trace metal chemists\, organic geochemists\, and global\, regional and process-based modellers\, including those using machine learning and bioinformatics. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n***SCOR Social Event***\n\n\n\n\n\n\n\n\nOpen to all!  \n\n\n\nRepresentatives from SCOR committees and activities as well as anyone–especially early-career scientists–interested in learning more about SCOR’s activities and opportunities are encouraged to attend to build connections across the community. \n\n\n\n\nDate & Time: Thursday\, 26 February\, 18:00-20:00 GMT\n\n\n\nLocation: Hotel Indigo Turbine 75 Bar\, 75 Waterloo St\n\n\n\nRSVPs are requested to best inform event arrangements. Register here.
URL:https://www.geotraces.org/event/ocean-sciences-meeting-2026/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251215T000000
DTEND;TZID=Europe/Paris:20251219T235959
DTSTAMP:20260424T103128
CREATED:20251128T112605Z
LAST-MODIFIED:20251128T114612Z
UID:60473-1765756800-1766188799@www.geotraces.org
SUMMARY:AGU2025 - General Meeting
DESCRIPTION:New Orleans\, Louisiana\, USA\, https://www.agu.org/annual-meeting \n\n\n\nCheck out the GEOTRACES sessions and join the GEOTRACES Science Exchange Event at AGU 2025!  \n\n\n\n\n\n\n\nGEOTRACES and GEOTRACES-related Sessions\n\n\n\n\n**Session OS23A – Physical and Biogeochemical Processes on the Warm Antarctic Continental ShelvesTuesday\, 16 December 2025\, 14:15 – 15:45 (local time)\, 215-216 (NOLA CC)\, Poster session: Tuesday\, 16 December 2025 \n\n\n\nThe “warm” continental shelves of West Antarctica\, which include the Amundsen and Bellingshausen seas and the West Antarctic Peninsula\, are characterized by enhanced on-shelf transport of Circumpolar Deep Water that helps determine on-shelf hydrographic and biogeochemical properties. This warm water also interacts with ice shelves\, influencing vertical mixing\, overturning rates and ice shelf mass loss\, and potentially triggering marine ice sheet instabilities. Warm shelf regions are undergoing rapid\, climate-sensitive changes\, which have important implications for ocean circulation\, biological production and biogeochemical exchange over spatial scales that may extend downstream to the Ross Sea and offshore waters of the Antarctic Circumpolar Current. For this interdisciplinary session\, we invite contributions that focus on both observational and modeling studies of ocean circulation\, sea ice-ocean and ice shelf-ocean interactions\, biogeochemical processes and biological production in Antarctic warm-shelf settings. We are especially interested in studies that explore links among these thematic topics. \n\n\n\nConveners: \n\n\n\nMadeline Mamer (Georgia Institute of Technology\, Student Convener)Kiya Riverman (University of Portland)Peter Sedwick (Old Dominion University)Robert Sherrell (Rutgers University)Andrew Thompson (Caltech) \n\n\n\nFull session details are here: https://agu.confex.com/agu/agu25/meetingapp.cgi/Session/272389 \n\n\n\n\n\n\n\n**Session A33A – Advances in Understanding Natural Aerosols and Gases in the Earth SystemWednesday\, 17 December 2025\, 14:15 – 15:45 (local time)\, 271 (NOLA CC) \n\n\n\nNatural aerosols and gases play a key role in the Earth System. They link terrestrial\, atmospheric\, and ocean processes and understanding changes in their emission and deposition is essential for assessing the climate response to human activities. This session aims to evaluate the current state of knowledge on aerosols and gases from natural sources\, such as wildfires\, dust\, volcanoes\, sea spray\, and biogenic emissions\, and to identify their impacts on climate\, biogeochemistry\, and society across diverse spatial and temporal scales. Topics of interest include\, but are not limited to: environmental drivers of natural aerosol and gas emissions; source apportionment; evolution of natural aerosol contribution to atmospheric composition; direct and indirect radiative effects; processes governing aerosol deposition and gas transfer at the air-sea and land-air interfaces; past and future changes to aerosol and gas fluxes; nutrient and contaminant exchange and impacts on ecosystems; and innovative observational approaches and modeling frameworks. \n\n\n\nConvenors:Yan FengDouglas HamiltonKostas TsigaridisNicholas Meskhidze \n\n\n\nFull session details are here: https://agu.confex.com/agu/agu25/meetingapp.cgi/Session/270649 \n\n\n\n\n\n\n\n\nGEOTRACES Science Exchange Event\n\n\n\n\nSE13B – Multi-tracer Data for Understanding and Quantifying Marine Biogeochemical Processes: the GEOTRACES Intermediate Data Product – 2025📅 Date: Monday\, 15 December 2025🕒 Time: 14:15 – 15:45 CST📍 Location: New Orleans Convention Center\, Room 343https://agu.confex.com/agu/agu25/meetingapp.cgi/Session/275608 \n\n\n\nDescriptionThis panel discussion will include presentations on the collection and collation of oceanographic tracer data\, validation of the data\, the technology for creating the Intermediate Data Product\, serving IDP2025 to the broadest scientific community\, and science highlights revealed in the data. \n\n\n\n\n\n\n\n\nProgramme \n\n\n\n\n\nThe GEOTRACES Intermediate Data Product (IDP2025): How to access and utilize the resourceWilliam Landing; Florida State University \n\n\n\nUsing GEOTRACES Intermediate Data Products in education and outreachPhoebe Lam; University of California Santa Cruz \n\n\n\nIron cycling in the mesopelagic oceanRandie Bundy; University of Washington \n\n\n\nDissolved iron input and cycling in the Amundsen SeaRob Sherrell; Rutgers University \n\n\n\nThe influence of hydrothermal inputs on the Central Pacific: Insights from the U.S. GEOTRACES GP15 and GP17-OCE expeditionsJessica Fitzsimmons; Texas A&M University College Station \n\n\n\nUse of thorium isotopes to quantify trace element input and cycling in the oceansChris Hayes; Massachusetts Institute of Technology \n\n\n\nFollowing the Particles: Using thorium-234 to trace elements pathways along U.S. GEOTRACES transectsWokil Bam; Louisiana State University \n\n\n\nMajor particle composition from the GEOTRACES GN01\, GP15\, and GP17-OCE expeditionsThao Vy Le; University of California Santa Cruz
URL:https://www.geotraces.org/event/agu2025-general-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251215T000000
DTEND;TZID=Europe/Paris:20251215T235959
DTSTAMP:20260424T103128
CREATED:20251118T145919Z
LAST-MODIFIED:20251128T114735Z
UID:60195-1765756800-1765843199@www.geotraces.org
SUMMARY:AGU2025 - GEOTRACES Science Exchange Event
DESCRIPTION:Please note the following GEOTRACES Science Exchange Event at AGU 2025 (15-19 December in New Orleans\, Louisiana\, USA\, https://www.agu.org/annual-meeting): \n\n\n\n\n\n\n\n\nSE13B – Multi-tracer Data for Understanding and Quantifying Marine Biogeochemical Processes: the GEOTRACES Intermediate Data Product – 2025📅 Date: Monday\, 15 December 2025🕒 Time: 14:15 – 15:45 CST📍 Location: New Orleans Convention Center\, Room 343https://agu.confex.com/agu/agu25/meetingapp.cgi/Session/275608 \n\n\n\nDescriptionThis panel discussion will include presentations on the collection and collation of oceanographic tracer data\, validation of the data\, the technology for creating the Intermediate Data Product\, serving IDP2025 to the broadest scientific community\, and science highlights revealed in the data. \n\n\n\n\n\n\n\n\nProgramme \n\n\n\n\n\nThe GEOTRACES Intermediate Data Product (IDP2025): How to access and utilize the resourceWilliam Landing; Florida State University \n\n\n\nUsing GEOTRACES Intermediate Data Products in education and outreachPhoebe Lam; University of California Santa Cruz \n\n\n\nIron cycling in the mesopelagic oceanRandie Bundy; University of Washington \n\n\n\nDissolved iron input and cycling in the Amundsen SeaRob Sherrell; Rutgers University \n\n\n\nThe influence of hydrothermal inputs on the Central Pacific: Insights from the U.S. GEOTRACES GP15 and GP17-OCE expeditionsJessica Fitzsimmons; Texas A&M University College Station \n\n\n\nUse of thorium isotopes to quantify trace element input and cycling in the oceansChris Hayes; Massachusetts Institute of Technology \n\n\n\nFollowing the Particles: Using thorium-234 to trace elements pathways along U.S. GEOTRACES transectsWokil Bam; Louisiana State University \n\n\n\nMajor particle composition from the GEOTRACES GN01\, GP15\, and GP17-OCE expeditionsThao Vy Le; University of California Santa Cruz
URL:https://www.geotraces.org/event/agu2025-geotraces-science-exchange-event/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250706T000000
DTEND;TZID=Europe/Paris:20250711T235959
DTSTAMP:20260424T103128
CREATED:20250122T105621Z
LAST-MODIFIED:20250328T112619Z
UID:58312-1751760000-1752278399@www.geotraces.org
SUMMARY:Goldschmidt 2025
DESCRIPTION:Prague\, Czech Republic \n\n\n\nGoldschmidt is the foremost annual\, international conference on geochemistry and related subjects\, organized by the Geochemical Society and the European Association of Geochemistry. \n\n\n\nWe draw your attention to the following GEOTRACES sessions: \n\n\n\n\n\n\n\nList of GEOTRACES and GEOTRACES-related sessions:\n\n\n\n\n*12a – Elemental Enigmas: Cracking the Code of Trace Metals in Polar Oceans \n\n\n\nThe cycling of trace metals in polar oceans is crucial for understanding biogeochemical processes and ecosystem health in these sensitive environments. Trace metals such as Fe\, Zn\, Ni\, Mn\, and Co are essential micronutrients that regulate phytoplankton productivity across vast regions of the global ocean\, notably the Southern Ocean and Arctic\, significantly impacting carbon cycling between ocean and atmosphere. In contrast\, toxic elements such as Hg which is of special concern in Arctic\, are posing potential environmental risks. Polar regions act as critical zones for ocean-atmosphere interactions\, with trace metal inputs from sea ice\, icebergs\, weathering\, melting permafrost\, hydrothermal activity\, continental shelf sediments\, and atmospheric deposition altering primary production. Trace metal isotopes and other means such as rare earth element composition have revolutionized our ability to trace the sources\, pathways\, and biogeochemical processes of trace metals in the ocean. These tools allow us to distinguish external input and disentangle biogeochemical processes such as biological uptake\, particle‐solution exchange\, and remineralization\, and provide insights into past ocean conditions.However\, the remoteness\, extreme weather\, and technical challenges in clean sampling and trace metal analysis hinder our understanding of their cycling in the rapidly changing polar oceans. Enhancing our knowledge of these understudied regions is critical\, as polar seas and the cryosphere act as precursors for global changes in other ecosystems. To this end\, this session invites research integrating isotopic\, trace metal data\, and biogeochemical models to explore sources\, cycling\, and biological responses\, advancing predictions of polar ocean impacts on climate change. \n\n\n\nConveners: \n\n\n\nHung-An TianAlfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung \n\n\n\nSaša MarcinekRuder Boskovic Institute \n\n\n\nRhiannon JonesBritish Antarctic Survey \n\n\n\n\n\n*12e – Tracing marine trace element dynamics: impact of external sources and oceanic cycling \n\n\n\nTrace elements and isotopes (TEIs) in the ocean play pivotal roles in primary productivity\, carbon cycling\, and marine biodiversity\, and serve as powerful tracers of oceanic processes. To reliably apply these geochemical proxies\, it is essential to develop a thorough understanding of the oceanic distribution of TEIs and physical and chemical processes that influence these patterns. The processes that influence the oceanic TEI distribution include inputs from various sources (e.g.\, river-estuarine\, atmospheric deposition\, submarine groundwater discharge\, hydrothermal inputs and marine benthic dynamics) and oceanic internal cycling (biological uptake and remineralization\, reversible scavenging\, particle-water interaction\, redox conditions\, and ocean circulation). Since the start of the GEOTRACES program\, observational TEI datasets have been rapidly accumulating\, providing valuable resources to the state-of-the-art ocean modeling tools to test hypotheses and predict distributions in regions that are still poorly constrained. This knowledge not only offers significant insights into the debate about the controls of modern ocean chemistry but also aids in resolving discrepancies arising from conflicting paleo-records of multiple geochemical proxies.This session invites contributions from observational\, experimental\, and modeling studies specifically focusing on (i) understanding the TEI distribution\, species\, and bio-availability in the ocean in connection to various sources and internal cycling\, (ii) the impact of processes at oceanic boundaries (atmosphere\, land\, shelf\, hydrothermal vents) on oceanic TEI distributions\, (iii) new insights into the processes of open ocean cycling\, (iv) application of AI/ML and other modeling techniques in assessing the marine TEI distribution. We encourage submissions based on multi-disciplinary and multi-proxy approaches. \n\n\n\nConveners: \n\n\n\nKai DengTongji University \n\n\n\nVineet GoswamiPhysical Research Laboratory \n\n\n\nAntao XuHeidelberg University \n\n\n\nSunil SinghCSIR-National Institute of Oceanography \n\n\n\n\n\n*12g – Seafloor hydrothermal processes and their impacts on the modern and ancient Earth \n\n\n\nSeafloor hydrothermal systems have profoundly influenced Earth’s biosphere\, lithosphere\, hydrosphere\, and atmosphere throughout Earth history and serve as crucial pathways for the transfer of materials and energy between the lithosphere and the exosphere (biosphere\, hydrosphere\, and atmosphere) today. Nonetheless\, hydrothermal systems’ nature within the oceanic crust drastically limits the temporal extent of direct geologic observations of their existence. Thus\, attempts to correlate seafloor hydrothermal processes with biological evolution\, global elemental budgets\, and global redox states throughout Earth history generally require interdisciplinary efforts that integrate studies of modern systems\, interpretations of the geologic record\, novel laboratory experiments\, and numerical models. Specific focuses could include the role of seafloor hydrothermalism in carbon and other elemental cycles\, studies of the linkages between high and low temperature hydrothermal alteration\, crustal mineralogy\, and seawater geochemistry\, and the relation between hydrothermal systems and the tempos and milestones of biological evolution. Submissions from early career researchers are especially welcome. \n\n\n\nConveners \n\n\n\nBenjamin M. TutoloThe University of Calgary \n\n\n\nWenhao WangSun Yat-sen University \n\n\n\nDrew SyversonUNC Charlotte \n\n\n\nKeynote Speaker \n\n\n\nJohn JamiesonDepartment of Earth Science\, Memorial University of Newfoundland \n\n\n\n\n\n13f – Geochemical proxy development for paleoceanographic and paleoclimatic research \n\n\n\nAnalysis of deep-time climatic and environmental variation is paramount to progress in understanding fundamental questions of Earth System feedbacks and sensitivity to perturbations (e.g.\, tipping points and thresholds)—including\, but not limited to\, extinctions\, large igneous provinces\, ice ages\, hyperthermalism\, as well as oceanic acidification and anoxia. However\, reconstruction of deep-time climatic and environmental change from sedimentary records remains challenging. New tools are needed to investigate poorly known aspects of paleoenvironmental systems as well as to test interpretations made using established paleoenvironmental proxies.The scope of this theme session includes novel proxy development as well as new constraints on existing geochemical proxy records. Topics include\, but are not limited to\, proxy development and calibration in modern and ancient systems (e.g.\, GEOTRACES)\, experimental constraints\, data-model calibrations\, and novel proxy applications in the ancient sedimentary record. We especially encourage submissions with new and innovative insights regarding mechanisms\, feedbacks\, or quantitative thresholds driving ancient geochemical perturbations and their relationship with environmental\, climatic\, and biological evolution. \n\n\n\nConveners \n\n\n\nJun ShenChina University of Geosciences\, Wuhan \n\n\n\nThomas J. AlgeoUniversity of Cincinnati \n\n\n\nDavid J JanssenEawag: Swiss Federal Institute of Aquatic Science and Technology \n\n\n\nSylvie BruggmannUniversity of Lausanne \n\n\n\nKeynote Speaker \n\n\n\nZunli LuSyracuse University \n\n\n\n\n\n\n\n\nTo submit an abstract please follow the instructions available here: https://conf.goldschmidt.info/goldschmidt/2025/cfp.cgi \n\n\n\nIf you wish your session to be included in this list\, please send an e-mail to ipo@geotraces.org
URL:https://www.geotraces.org/event/goldschmidt-2025/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250507T000000
DTEND;TZID=Europe/Paris:20250507T235959
DTSTAMP:20260424T103128
CREATED:20250430T103443Z
LAST-MODIFIED:20250507T113406Z
UID:58961-1746576000-1746662399@www.geotraces.org
SUMMARY:Webinar: Boosting Ocean Data Sharing in the UN Ocean Decade
DESCRIPTION:GEOTRACES will participate on the UN Ocean Decade webinar series: \n\n\n\n“Boosting Ocean Data Sharing in the UN Ocean Decade” \n\n\n\n When: May 7th\, 2025 \n\n\n\n Time: 4 PM CET / 10 AM ET \n\n\n\n Registration is now open! https://forms.gle/TVDbfKU4gftWWkrx7 \n\n\n\nWhat to expect: \n\n\n\n– A short introduction by Dr. Adam Leadbetter\, Lead Manager of the Decade Coordination Office for Ocean Data Sharing \n\n\n\n– The success story of the International GEOTRACES Programme\, a global initiative that gathers scientists from over 35 countries to share marine hydrographical and biogeochemical data in an open-access format.
URL:https://www.geotraces.org/event/boosting-ocean-data-sharing-in-the-un-ocean-decade/
CATEGORIES:GEOTRACES,GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250427T000000
DTEND;TZID=Europe/Paris:20250502T235959
DTSTAMP:20260424T103128
CREATED:20240926T130448Z
LAST-MODIFIED:20250328T103048Z
UID:57504-1745712000-1746230399@www.geotraces.org
SUMMARY:EGU General Assembly 2025
DESCRIPTION:Vienna\, Austria & Online\n\n\n\nThe EGU General Assembly 2025 brings together geoscientists from all over the world to one meeting covering all disciplines of the Earth\, planetary\, and space sciences. The EGU aims to provide a forum where scientists\, especially early career researchers\, can present their work and discuss their ideas with experts in all fields of geoscience. \n\n\n\n \n\n\n\nGEOTRACES relevant session:\n\n\n\nChemical Processes in Coastal Oceans: Natural and Anthropogenic impacts on the biogeochemical processes \n\n\n\nConvener: Aridane González González | Co-conveners: David González-Santana\, J. Magdalena Santana-Casiano\, Melchor Gonzalez-Davila \n\n\n\nCoastal oceans are dynamic interfaces between land and sea\, playing a critical role in global biogeochemical cycles with a high impact on socio-economic activities and social developments. The dynamic and physical processes as well as the human activities that take place in coastal areas make them natural laboratories to improve our knowledge about several biogeochemical interactions. In addition\, these regions are affected by both natural and anthropogenic factors such as coastal acidification\, organic matter\, nutrients\, and pollution\, among others. All these factors have impacts on the natural cycles and the magnitude of these impacts should be studied and understood in order to propose solutions to the decision makers that could help to know\, understand\, take decisions\, and protect or regulate the coastal environments. \n\n\n\nThis session aims to bring together researchers from diverse fields to discuss the latest findings on the biogeochemical processes occurring in coastal oceans\, improve our knowledge\, identify impacts\, and propose solutions. We welcome research studies that focus on both natural and anthropogenic processes that are affecting the trace metal chemistry\, CO2 system\, ocean acidification\, nutrient cycle\, organic matter\, CO2 sequestration and their impacts on the chemical processes\, etc. \n\n\n\nShare:https://meetingorganizer.copernicus.org/EGU25/session/52604 
URL:https://www.geotraces.org/event/egu-general-assembly-2025/
CATEGORIES:GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20241209T000000
DTEND;TZID=Europe/Paris:20241213T235959
DTSTAMP:20260424T103128
CREATED:20240618T082402Z
LAST-MODIFIED:20241206T100923Z
UID:57236-1733702400-1734134399@www.geotraces.org
SUMMARY:AGU2024 Annual Meeting
DESCRIPTION:Washington\, DC. USA and online.https://www.agu.org/annual-meeting \n\n\n\n\n\n\n\nWhat’s Next for Science \n\n\n\nEach year\, AGU’s annual meeting\, the largest gathering of Earth and space scientists\, convenes 25\,000+ attendees from 100+ countries to share research and connect with friends and colleagues. Scientists\, educators\, policymakers\, journalists and communicators attend AGU24 to better understand our planet and environment\, opening pathways to discovery\, opening greater awareness to address climate change\, opening greater collaborations to lead to solutions and opening the fields and professions of science to a whole new age of justice equity\, diversity\, inclusion and belonging. \n\n\n\n\n\n\n\nFind below the information on two GEOTRACES sessions and a related event at AGU2024: \n\n\n\n\n\n\n\nGEOTRACES sessions:\n\n\n\n*OS23H – Trace Element Distributions and Cycling Across Ocean Basinshttps://agu.confex.com/agu/agu24/meetingapp.cgi/Session/236929Tuesday\, 10 December 2024Marine trace elements and their isotopes regulate primary production and provide tracers of past and present oceanic processes\, including circulation and particle export. The influence of trace elements on productivity and the ocean carbon cycle is particularly notable in the remote Southern Ocean\, where distant or ice-covered continents provide reduced inputs and water mass circulation impacts global transfer of heat and nutrients. A number of recent expeditions have sampled these waters\, providing new data on tracing external elemental fluxes to the region\, constraining complex biogeochemical processes\, and measuring their imprint on subsurface water masses. This session invites presentations addressing the sources\, sinks\, and cycling of trace elements in the ocean\, particularly as studied using ocean basin sections. Results from fieldwork and/or modeling studies in the Southern Ocean\, Antarctic Circumpolar Current\, and Antarctic coastal waters are particularly encouraged\, though results from all ocean basins are welcome.Primary ConvenerBenjamin S Twining\, Bigelow Lab for Ocean SciencesConvenersJessica N Fitzsimmons\, Texas A&M University College StationGregory A Cutter\, Old Dominion University \n\n\n\n\n*OS41H – Disentangling Hydrothermal Impacts on Ocean Biogeochemistryhttps://agu.confex.com/agu/agu24/meetingapp.cgi/Session/237098Thursday\, 12 December 2024 \n\n\n\n\nExciting new research reveals the significant impact of submarine hydrothermal venting on ocean biogeochemistry at both basin and global scales. Understanding this impact requires examining processes across various scales and integrating multiple disciplines\, including observations\, experiments\, data synthesis\, and modeling. This session invites submissions on hydrothermal biogeochemistry research across all venting styles and scales. It aims to connect drivers of hydrothermal processes from marine geoscience\, organic geochemistry\, ocean circulation\, carbon and biogeochemical cycles\, and marine microbiology. We especially welcome contributions from international programs like GEOTRACES and InterRidge\, and novel research on diverse seafloor fluid flow systems worldwide\, such as mid-ocean ridges\, intraplate seamounts\, convergent margins\, and transform faults. Field\, laboratory\, and theoretical studies on the roles of hydrothermal systems in the cycling and transformation of organic matter and nutrients in the oceans are also encouraged.Primary ConvenerChristopher R German\, WHOIConvenersChristopher R German\, WHOIRandelle M Bundy\, University of Washington Seattle CampusAlessandro Tagliabue\, University of LiverpoolStudent/Early Career ConvenerAlexandria Aspin\, Oakland University \n\n\n\n\n\nRelated event that the organisers asked the IPO to share:\n\n\n\nCommunity Meeting – UNOLS Arctic Marine Research Capabilities Committee (AMRCC)December 10\, 202412:30-13:30Westin DC Downtown\, 9th St NW\, Washington\, DCThe AMRCC is a UNOLS Special Committee established in June 2024 by the UNOLS Chair and Council at the request of the NSF\, ONR\, and USARC. The purpose of the Committee is to reviewand refresh science missions and affiliated science mission requirements (SMRs) of future Federal icebreakers operating in the Arctic Ocean and other northern polar regions. To do so\, the Committee is assessing if the existing science missions and SMRs for such missions meet current and emerging needs for Arctic research on Federal icebreakers and is identifying any additional SMRs required to ensure that Federal icebreakers will meet the needs of the Arctic marine research community for the next 30 years. Specifically\, the Committee is reviewing and refreshing SMRs for (a) any commercially available polar icebreaker that may be acquired or procured and refit for operation by the Federal government; and (b) the conceptual design of future “medium” or “heavy” Federal-flagged and owned icebreakers.At this meeting\, Committee members will review the charge to the Committee and the Committee’s activities to date and will welcome comments and input on envisioned science directions and research cruises in the Arctic Ocean for the next 30 years\, on existing and future gaps in our ability to address these questions\, and on critically needed science enabling capabilities of federal vessels in the Arctic Ocean.Please contact Carin Ashjian (cashjian@whoi.edu)\, AMRCC Chair\, or Doug Russell (doug@unols.org)\, UNOLS Executive Secretary\, with any questions. The Westin DC Downtown is an ~5-minute walk from the Convention Center.See: https://www.unols.org/committee/special-committee-arctic-marine-research-capabilities-committee-amrcc for more information on the Committee.
URL:https://www.geotraces.org/event/agu2024/
CATEGORIES:GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20240218T000000
DTEND;TZID=Europe/Paris:20240223T235959
DTSTAMP:20260424T103128
CREATED:20230725T075856Z
LAST-MODIFIED:20240205T131958Z
UID:54485-1708214400-1708732799@www.geotraces.org
SUMMARY:Ocean Sciences Meeting 2024
DESCRIPTION:New Orleans\, Lousiana. \n\n\n\nhttps://www.agu.org/Ocean-Sciences-Meeting \n\n\n\n\n\n\n\nGEOTRACES will have a major presence at 2024 Ocean Sciences Meeting. This includes: \n\n\n\n** SCOR Booth ** ** GEOTRACES Sessions ** ** GEOTRACES-related events ** \n\n\n\nPlease find the details below. \n\n\n\n\n\n\n\n\n** SCOR Booth **\n\n\n\n\n\n\n\nGEOTRACES committee members will be at the SCOR booth to answer your questions and help registering your GEOTRACES datasets for inclusion in the next Intermediate Date Product (IDP2025\, check IDP2025 timeline)! \n\n\n\n\n\n\n\nStop by to get started registering your datasets for next IDP!  \n\n\n\nWhen: Monday 19 February to Thursday 22 February\, 2024\, 10am to 6pm (Monday 3-6pm only\, Thursday 10am-1pm only) \n\n\n\nWhere: Booth #607 – The booth staffing schedules will be posted here soon. \n\n\n\n\n\n\n\n\n\n\n\n\n\n***GEOTRACES and GEOTRACES related sessions***\n\n\n\n(scroll down to view the descriptions or click on the corresponding link) \n\n\n\n\n\n\n\n*Geochemical tracers of ocean processeshttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/217559 \n\n\n\nMonday\, 19 February 2024 –  10:30 – 12:00 (local time) \n\n\n\nLauren Kipp\, Rowan University\, Glassboro\, Chris T Hayes\, University of Southern Mississippi\, Stennis Space Center\, MS\, United States\, Erin Black\, University of Rochester and Thomas S Weber\, University of Rochester\, Department of Earth and Environmental Sciences\, Rochester\, NY\, United StatesSession Proposal \n\n\n\n \n\n\n\n*Biogeochemical Cycling in the Caribbean Sea\, the Gulf of Mexico and Beyondhttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/218094 \n\n\n\nThursday\, 22 February 2024 –  10:30 – 12:00 (local time) \n\n\n\nTim Conway\, University of South Florida\, College of Marine Science\, St. Petersburg\, Angela N Knapp\, Florida State University\, Tallahassee\, FL\, United States\, Juan Carlos Herguera\, Center for Scientific Research and Higher Education at Ensenada\, Ensenada\, Mexico and Jessica N Fitzsimmons\, Texas A&M University\, Oceanography\, College Station\, TX\, United States \n\n\n\n\n\n\n\n*Speciation and Bioavailability of Trace Metals in the Marine Environmenthttps://agu.confex.com/agu/OSM24/prelim.cgi/Session/218172 \n\n\n\nThursday\, 22 February 2024 – 08:30 – 10:00 and 10:30 – 12:00 (local time) Poster session: Wednesday\, 21 February 2024 – 16:00 – 18:00 (local time) \n\n\n\nKristen N Buck\, Oregon State University\, College of Earth\, Ocean\, and Atmospheric Sciences\, Corvallis\, OR\, United States\, Ana Aguilar-Islas\, University of Alaska Fairbanks\, College of Fisheries and Ocean Sciences\, Fairbanks\, United States\, Randelle M Bundy\, University of Washington Seattle Campus\, School of Oceanography\, Seattle\, United States\, Maeve C Lohan\, University of Southampton\, Ocean and Earth Sciences\, National Oceanography Centre\, Southampton\, United Kingdom and Machakalai Rajesh Kumar\, Sathyabama Institute of Science and Technology\, Chennai\, IndiaSession Proposal \n\n\n\n\n\n\n\n*Heading South: Contrasting Biogeochemical Cycling of Trace Elements and Isotopes from Tropical to Southern Ocean Watershttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/217957 \n\n\n\nFriday\, 23 February 2024 – 14:00 – 15:30 (local time) \n\n\n\nGregory A Cutter\, Old Dominion University\, Ocean and Earth Sciences\, Norfolk\, United States\, Jessica N Fitzsimmons\, Texas A&M University\, Oceanography\, College Station\, TX\, United States\, Benjamin S Twining\, Bigelow Lab for Ocean Sciences\, East Boothbay\, ME\, United States and Isuri Kapuge\, University of Delaware\, Newark\, United States \n\n\n\n \n\n\n\n*Observation-Based Data Products of Ocean Biogeochemistry and the Importance of Standardized Measurement and Uncertainty Estimation Protocols in Marine Sciencehttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/218286 \n\n\n\nFriday\, 23 February 2024 –  14:00 – 15:30 (local time) \n\n\n\nJonathan David Sharp\, CICOES\, Seattle\, United States; NOAA Pacific Marine Environmental Laboratory\, Seattle\, United States\, Raphaelle Sauzede\, Sorbonne Université\, CNRS\, Institut de la Mer de Villefranche (IMEV)\, Villefranche-sur-mer\, France\, Aimee Renee Neeley\, NASA Goddard Space Flight Center\, Greenbelt\, United States\, Joaquin Ernesto Chaves\, NASA Goddard Space Flight Center\, Easton\, MD\, United States and Chelsea Lopez\, NASA Goddard Space Flight Center\, Greenbelt\, MD\, United States \n\n\n\n \n\n\n\n*Time-series observations of ocean biogeochemistry: what we have learned and what we will learnhttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/218180 \n\n\n\nMonday\, 19 February 2024 – 08:30 – 10:00 (local time) \n\n\n\nMaki Noguchi Aita (JAMSTEC Japan Agency for Marine-Earth Science and Technology)\, Makio Honda (JAMSTEC Japan Agency for Marine-Earth Science and Technology)\, Rut Pedrosa Pamies (Marine Biological Laboratory)\, Angelicque E White (University of Hawaii at Manoa) \n\n\n\n\n\n\n\n*The influence of boundary currents on exchange processes between continental margins and the open ocean and biogeochemical consequenceshttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/198113 \n\n\n\nMonday\, 19 February 2024 – Poster session (16:00 – 18:00 – local time) \n\n\n\nAnh Pham\, University of California\, Los Angeles\, Department of Atmospheric and Oceanic Sciences\, Los Angeles\, United States\, Christian Briseño-Avena\, University of North Carolina at Wilmington\, Biology and Marine Biology\, Wilmington\, United States\, Tamaryn Morris\, South African Weather Service\, Pretoria\, South Africa and Alexis Floback\, University of Southern California\, Department of Biological Sciences\, Los Angeles\, United States \n\n\n\n \n\n\n\nSession Descriptions:\n\n\n\nHeading South: Contrasting Biogeochemical Cycling of Trace Elements and Isotopes from Tropical to Southern Ocean Waters \n\n\n\nThe cycling of biologically-essential trace elements like iron and zinc\, and predominantly scavenged elements like lead and thorium\, is driven by complex interactions of physical transport and mixing\, spatially-variable sources and sinks\, and species-specific biological uptake and regeneration. Nowhere are these controls more evident than at transitions between the ultra-oligotrophic subtropical gyres\, the highly productive waters of the Antarctic Circumpolar Current\, and the HNLC waters surrounding Antarctica. Sampling across these regimes allows the processes affecting the cycling of trace elements and isotopes to be revealed. Indeed\, programs such as SOCCOM\, GEOTRACES\, SOLAS\, and GO-SHIP have used sampling and transects in these transitional waters of the Southern Ocean. This session invites presentations on processes affecting trace elements and isotopes\, methods to study them\, and modeling approaches to explore mechanisms and rates of biogeochemical processes that are revealed in waters near the Southern Ocean. \n\n\n\nGeochemical tracers of ocean processes \n\n\n\nInternational programs such as GEOTRACES have greatly improved our understanding of the basin-scale distributions of carbon\, nutrients\, and trace elements and isotopes (TEIs) in the ocean. However\, data gaps still exist around the sources\, sinks\, and internal cycling processes that set the observed distributions. Naturally occurring radioactive isotopes can be applied as geochemical tracers to help constrain the rates of TEI input\, removal\, and transport\, while stable isotopes are exploited as tracers of sources and of internal cycling. Such processes may include the supply of aerosols to the ocean\, export of material from the surface ocean\, particle dynamics and fluxes of sinking particulate material\, sources to the water column from the early diagenesis of sediments\, sources from submarine groundwater discharge\, biological uptake of nutrients and nutrient-like chemical species\, and more. This session will be of interest to investigators applying geochemical tracers in the study of any of these processes\, using observational and/or modeling approaches. It is hoped that synthesis activities combining different TEIs or combining models with observations will emerge as a product of this session. \n\n\n\nBiogeochemical Cycling in the Caribbean Sea\, the Gulf of Mexico and Beyond \n\n\n\nThe Caribbean and Gulf of Mexico are dynamic\, interconnected\, marginal seas that host the complete range of marginal ocean environments\, including coastal shelves\, eutrophic coastal systems\, oligotrophic open waters\, anoxic basins\, dust gradients\, hydrocarbon seeps\, and hydrothermal/volcanic activity. A panoply of margin fluxes (atmospheric\, riverine\, submarine groundwater\, etc)\, the Mississippi\, productivity gradients\, periodic algal blooms\, and pollution events all drive regional spatial and temporal variability in the biogeochemistry of nutrients and trace elements and isotopes (TEIs)\, making the region an ideal natural laboratory for testing biogeochemical hypotheses. Teleconnections between the Caribbean\, the Gulf\, the Gulf Stream\, and the Atlantic provide unique opportunities for investigating how marginal environments transform and modify supply of nutrients and TEIs to open ocean waters. We invite contributions that characterize variability in the biogeochemistry/geochemistry of the Gulf and the Caribbean\, and especially the linkages between these seas and the Atlantic. Suggested submissions may include: water column nutrient\, TEI\, or geochemical distributions and fluxes; biogeochemical rate measurements\, regional biogeochemistry\, and descriptions of circulation that impact biogeochemical dynamics. This session aims to bring together interested international investigators to highlight findings and to identify areas of common interest and collaborative opportunities to help inform future planning in national/international programs. \n\n\n\nSpeciation and Bioavailability of Trace Metals in the Marine Environment \n\n\n\nThe trace metals manganese\, iron\, cobalt\, nickel\, copper\, zinc\, and cadmium play important roles in the productivity and composition of marine phytoplankton communities. Some of these metals serve as limiting nutrients to phytoplankton in open ocean regions\, others can substitute for essential metals that are less abundant\, and still others can be toxic at elevated concentrations. The bioavailability of trace metals to phytoplankton and microorganisms is largely governed by their chemical form\, or speciation\, in seawater. Insights from recent studies have highlighted the range of strategies that microorganisms employ to acquire the metals they need and the interplay between trace metals during phytoplankton growth and decay. However\, there is still much left to learn about biogeochemical controls on trace metal bioavailability and how changing ocean conditions may influence trace metal cycling and speciation. This session welcomes submissions from across the field of trace metal biogeochemistry\, including temporal and spatial studies of metal speciation from GEOTRACES and other efforts\, and experimental or modeling studies that examine feedbacks between microorganisms and trace metal chemistry\, interactions between trace metals in natural systems\, or the impacts of changing conditions (e.g.\, pH\, oxygen\, temperature) on trace metal speciation or bioavailability. \n\n\n\nObservation-Based Data Products of Ocean Biogeochemistry and the Importance of Standardized Measurement and Uncertainty Estimation Protocols in Marine Science \n\n\n\nAccurate observations of ocean environmental parameters are essential for advancing scientific knowledge and informing management decisions\, and have revealed significant ocean changes over recent decades. However\, inconsistencies in instrumentation and measurement protocols can hinder data comparison and synthesis across studies. Further\, discrepancies between observations and models\, which are important tools for projecting future changes\, remain challenging to assess due to the spatiotemporal sparsity and methodological heterogeneity of ocean biogeochemical observations. The availability of open datasets from large-scale measurement campaigns (e.g.\, Argo and Biogeochemical Argo\, GEOTRACES\, GO-SHIP\, EXPORTS) presents opportunities to apply statistical\, machine-learning\, and/or interpolative techniques to fill gaps in scattered observations to produce global\, seasonally and inter-annually resolved data products. This prospect of constructing gap-filled products from heterogenous observational datasets necessitates the adoption of standardized\, consistent measurement protocols. This session will bring together researchers involved in the creation\, analysis\, or optimization of ocean observational products and the designing\, testing\, and implementing community consensus protocols for measurement standardization. Presentations will showcase new and in-development products and foster discussion about utilizing large datasets\, interpolating between observations\, promoting consistency in measurement protocols and uncertainty estimations\, and examining the role of technological advances in the measurement of ocean parameters. \n\n\n\nTime-series observations of ocean biogeochemistry: what we have learned and what we will learn. \n\n\n\nOcean time-series monitoring and sampling has provided several scientific and societal insights\, such as understanding climate-driven changes in ocean temperature\, biogeochemical cycles and marine ecosystems. Several long-term multi-variable data sets covering the atmosphere’s and ocean’s physics from the surface to the deep layer are international available in data repositories (e\,g.\, OceanSITES\, BCO-DMO). However\, data sets of water column and seafloor biogeochemistry measurements are not fully sufficient to our understanding of ocean function. For example\, there is still a lack of understanding of the relationship between surface primary production\, the biological carbon pump\, and the carbon requirements of organisms in the deeper layers. Furthermore\, long-term data to understand the coupling between biological responses and biogeochemical cycling and increasing environmental multi-stressors\, such as global warming\, acidification\, and anoxia\, is essential. In this session\, we will emphasize the importance of sustained ocean time-series programs\, and discuss the key issues that should be addressed to maintain and enhance ocean observation systems and reduce uncertainties in model predictions\, in addition to the knowledge obtained from time-series observations to date\, as well as the linkage of various approaches\, such as field observations\, satellite observations\, numerical models\, and technological development. \n\n\n\nThe influence of boundary currents on exchange processes between continental margins and the open ocean and biogeochemical consequences \n\n\n\nContinental shelf margins and their adjacent boundary current systems are significant in global budgets of heat\, freshwater and biogeochemical properties\, and are regions of strong air-sea interactions and frontal instabilities. The transport and exchanges of water masses\, heat\, nutrients\, biogeochemical constituents\, and pollutants between ocean margins and the open ocean influence biodiversity\, biomass\, and biological interactions in marine food webs\, which consequently mediate the fate of carbon and element flows. However\, understanding these exchanges has been hindered by the “scale gap” between local mixing processes\, cross shelf and onshore transport\, and interactions with boundary currents. This session explores new approaches to close the scale gap in understanding coast – ocean exchange. We encourage submissions based on empirical observations\, numerical and theoretical models that focus on: (1) material exchange in western and eastern boundary current systems; (2) the role of mesoscale and submesoscale circulations in transporting material across isobath barriers; and (3) modeling approaches that bridge the scale gap. We particularly welcome studies that focus on seasonal cycles and inter-annual variability\, climate change impacts\, extreme events\, multiscale processes\, trends\, and linkages to ecosystems. \n\n\n\n\n\n ** GEOTRACES-related events **\n\n\n\n\n\n\n\nMarChemSpec at the Ocean Sciences Meeting \n\n\n\nThose will long GEOTRACES memories will be aware of the chemical speciation modelling initiative that began as SCOR Working Group 145. This initiative has now transitioned to be a part of the IAPSO/SCOR/IAPWS Joint Committee on the Properties of Seawater. \n\n\n\nAt Ocean Sciences 2024 the group will release version 1.1 of the software product. The software is freely available via the website marchemspec.org\, and can be run standalone or called from MATLAB or Python. New for version 1.1 is the ability to fix any two of the CO2 system parameters. \n\n\n\nProject leaders David Turner and Simon Clegg will present posters on MarChemSpec applications to marine carbon dioxide removal (mCDR) (CM24A-1140) and trace metal complexation (OB34C-0880) at OSM24. Meet them at their posters and visit the Ocean Carbon & Biogeochemistry (OCB) Exhibit Booth (BOOTH 512\, OSM Exhibit Hall) to test drive the new software. David and Simon will be at the meeting all week\, and their availability at the OCB booth is likely to be broadly: \n\n\n\n\nTuesday: 10 am – 6 pm\n\n\n\nWednesday: 10 am – 4 pm\n\n\n\nThursday: 10 am\, 12 noon – 1 pm\n\n\n\n\nIf you want to arrange a specific time to meet\, please email to david.turner@marine.gu.se  or s.clegg@uea.ac.uk \n\n\n\n\n\n\n\nTown Hall “Margin/Basin Biogeochemical Dynamics: Priorities and Future Directions“ \n\n\n\nhttps://agu.confex.com/agu/OSM24/meetingapp.cgi/Session/195029 \n\n\n\nMonday\, 19 February 2024 – 12:45 – 13:45 (local time) \n\n\n\nContinental margins play a critical role in the exchange of materials between the continents and ocean basins\, and are important as sources and sinks of oxygen in their own right.   They have great economic and societal importance in terms of natural capital\, including fisheries.    Margin systems are influenced by processes common to all margins as well as factors reflecting the physical characteristics of each system.   Overlaying this complexity are the long-term effects of climate change\, which is predicted to impact marginal seas sooner than interior basins.   Recent innovations in modeling and observational technologies have the potential to advance our understanding of the biogeochemistry of this vital component of the marine system.   This Town Hall will address the future objectives of biogeochemical research in internal cycling within margins and exchange processes with ocean basins.   The Ocean Sciences Meeting is a good forum because of the strong international component. Several nations\, including Japan and Germany\, have developed very strong interdisciplinary region-specific programs spanning multiple years and we have much to learn from them.  We will also address challenges including establishing a consensus on benthic flux measurements as well as strategies link margin processes with processes occurring at the land-margin interface.
URL:https://www.geotraces.org/event/ocean-sciences-meeting-2024/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230709T000000
DTEND;TZID=Europe/Paris:20230714T235959
DTSTAMP:20260424T103128
CREATED:20221213T153254Z
LAST-MODIFIED:20230605T092410Z
UID:39294-1688860800-1689379199@www.geotraces.org
SUMMARY:Goldschmidt 2023
DESCRIPTION:There is a very interesting programme at Goldschmidt 2023 (9-14 July 2023\, Lyon\, France and online)! \n\n\n\nA list of GEOTRACES and GEOTRACES-related sessions is below (scroll down to read the session descriptions). \n\n\n\nThe deadline for abstract submission is March\, 1st 2023. \n\n\n\nList of GEOTRACES or GEOTRACES-related sessions:\n\n\n\n\n\n\n\nTheme 13\, Chemistry and physical processes of the oceans and atmosphere: now and through time:\n\n\n\n13c – Marine trace element cycling from the estuaries to the open ocean (GEOTRACES) \n\n\n\n13h – Emerging insights into processes controlling elemental and non-traditional stable isotope paleoproxies in past and present oceans \n\n\n\n13d – Hydrothermal vents from discharge to biogeochemical impacts \n\n\n\n\n\n\n\nTheme 14\, Science and Society:\n\n\n\nIn order to support broad participation\, all abstracts submitted to this theme are free of charge\, and can be in addition to another abstract from the same presenting author in another theme. \n\n\n\n14a – Use of GEOTRACES data to understand biogeochemical processes in the oceans \n\n\n\n14d – Lessons learned in communicating geochemistry to non-scientific audiences \n\n\n\n14c – Geoscientists’ Little Helpers – small software tools with big impact \n\n\n\n14e – Initiatives to advance diversity\, equity\, and inclusion in geochemistry \n\n\n\n14b – Engaging with a variety of communities: a workshop-style session to discuss issues\, ideas\, and practical solutions for more effective outreach \n\n\n\n14f – History of Geochemistry \n\n\n\n\n\n\n\nSession Descriptions:\n\n\n\n13c – Marine trace element cycling from the estuaries to the open ocean (GEOTRACES)Kai Deng\, ETH ZürichHelene Planquette\, Univ Brest\, CNRS\, IRD\, Ifremer\, LEMARAnh Le-Duy Pham\, University of California\, Los AngelesJennifer L Middleton\, Columbia UniversityPierre Damien\, University of California Los AngelesMarion Anne Fourquez\, Mediterranean Institue of OceanographyTrace elements and their isotopes in the ocean play essential roles as regulators of ocean carbon production and marine biodiversity\, as well as tracers of circulation and particle transport. This session highlights three areas of recent research that need critical attention. (1) Observational\, experimental and modelling contributions on the distribution\, flux and controls of particle-reactive elements from estuaries to open ocean. These particle-reactive elements such as rare earth elements\, Th\, Pa\, Pb\, Po\, Be\, involve processes and fluxes that are relevant in both the modern and paleo-ocean. (2) The impact of small-scale physical processes\, including submesoscale (<10 km) and mesoscale (<100 km) circulation\, turbulent mixing\, and sea-ice transport and melting on bioactive trace metals (Fe\, Mn\, Co\, Ni\, Cu\, etc.). Observational datasets on trace metals relevant to these processes are rapidly accumulating and state-of-the-art ocean modelling can use these as targets or predict distributions in areas with sparse data coverage. (3) The Southern Ocean as a whole\, and the Indian Ocean sector in particular remains poorly observed for trace elements and isotopes. Presentations are welcome on the recent SWINGS (Southwest Indian GEOTRACES Section\, Jan-Mar 2021) cruise as well as other Southern Ocean or GEOTRACES expeditions that investigate all aspects of marine trace element cycling including biogenic uptake\, remineralization\, particle fate\, export\, and circulation transport. Submission relating to all three of these areas are encouraged\, and especially by early career scientists. \n\n\n\n13h – Emerging insights into processes controlling elemental and non-traditional stable isotope paleoproxies in past and present oceansDavid J Janssen\, EawagAdina Paytan\, University of California\, Santa CruzSusan H Little\, University College LondonJiawang Wu\, Sun Yat-Sen UniversityGert J. De Lange\, Geosciences UtrechtRuifang Xie\, Shanghai Jiao Tong University \n\n\n\nTrace elements and their stable isotopes can serve as powerful proxies for understanding the biogeochemical history of the Earth\, as indicated by the biogeochemical regulations on their distribution in the modern ocean. Combinations of concentration and stable isotope data are providing new insights into their cycling\, sources and sinks. Recent results from these proxies have demonstrated their potential to build mechanistic understandings of the processes driving local and global paleoenvironmental conditions. Advancements in analytical capabilities and coordinated programs such as GEOTRACES and the Sedimentary Geochemistry and Paleoenvironments Project\, building global datasets from modern and paleo settings\, are greatly expanding proxy potentials. These advances allow for refinement of paleoproxy applications\, and the opportunity to reassess and improve some of the assumptions and uncertainties still existing.This session aims to connect modern\, paleo and methodological development communities to better integrate understandings of the present-ocean into paleoproxy applications\, and to identify key uncertainties where further research is needed. We welcome contributions improving the understanding of the biogeochemical controls on stable isotope distributions including data from modern settings\, from global modelling studies\, from culture or leaching experiments\, from studies on preservation and isolation of signals in sedimentary archives\, and from novel multi-proxy approaches. We also recognize that the field of non-traditional stable isotope geochemistry requires expensive infrastructure and time-consuming analyses\, facts that currently limit the diversity of scientists within it and thus the discipline as a whole. We welcome studies demonstrating good practice to increase accessibility\, diversity\, equity\, and inclusion of the field. \n\n\n\n13d – Hydrothermal vents from discharge to biogeochemical impactsZvi Steiner\, GEOMAR Helmholtz Centre for Ocean Research KielAnna Lichtschlag\, National Oceanography CentreDavid González-Santana\, Universidad de Las Palmas de Gran Canaria (ULPGC)Ziming Yang\, Oakland UniversityNatascha Riedinger\, Oklahoma State UniversitySeafloor hydrothermal systems and submarine volcanoes are crucial for the marine environment as they return buried substances\, including metals and dissolved gases\, from the Earth’s interior to the ocean and thus\, over geologic times\, control the composition of seawater and provide essential elements to the biosphere. Process understanding of the fate of hydrothermal products and discharges\, including complexation and scavenging by hydrothermal particles can be used as tool for answering questions around the controls of hydrothermal systems\, their evolution and activity over time and their potential impact on ocean productivity. This session will explore the fate of hydrothermal products and discharges proximal and distal to hydrothermal sources\, the diagenetic and microbial processes they undergo after deposition\, and their impact on the marine environment. We invite observational\, experimental and modelling contributions\, new approaches and new methodologies for shallow and deep hydrothermal systems from present and past times. We encourage submissions that will give new insights into the evolution of a hydrothermal system\, organic-mineral interactions\, spatial distribution and fluxes of products and discharges and the diagenetic alteration of hydrothermal products. Finally\, there are many parallels between the impacts of marine vulcanism and ocean acidification which we encourage submitters to consider. \n\n\n\n14a – Use of GEOTRACES data to understand biogeochemical processes in the oceansWilliam M. Landing\, Florida State UniversityAngela Milne\, University of Plymouth \n\n\n\nWe invite poster submissions demonstrating how trace element and isotope data\, together with nutrient\, oxygen\, hydrographic and BioGEOTRACES data from the GEOTRACES Intermediate Data Product (IDP2021) are being used to understand the biogeochemistry of the oceans. You might have used GEOTRACES data to quantify or constrain the input\, internal cycling\, and removal processes that ultimately control the global distributions of trace elements and isotopes (TEIs)\, especially those that are involved in biological cycling processes. You might have used GEOTRACES data in your teaching or outreach efforts\, and we definitely solicit reports from those activities. We imagine a collegial and convivial session where we can enjoy learning more about the various ways GEOTRACES data are being utilized. \n\n\n\n14d – Lessons learned in communicating geochemistry to non-scientific audiencesElena Masferrer Dodas\, GEOTRACES International Project OfficeChrissy Wiederwohl\, Texas A&M UniversityWe invite submission of experiences and materials for engaging with and communicating geochemistry to non-scientific audiences: general public\, schools\, the media\, policymakers\, and other stakeholders. Geochemists and scientists in general\, are very often faced to the challenge of communicating and sharing their knowledge to different audiences in a way that it is understandable to them.This session has the double purpose of showcasing examples which could serve as source of inspiration and at the same time highlight effective strategies that geochemists could follow to successfully engage with a non-scientific audience. \n\n\n\n14c – Geoscientists’ Little Helpers – small software tools with big impactJie Xu\, Institut für Geowissenschaften\, Goethe Universität FrankfurtThomas Rose\, Goethe Universität Frankfurt and Leibniz-Forschungsmuseum für Georessourcen/Deutsches Bergbau-Museum BochumJesse B. Walters\, Institut für Geowissenschaften\, Goethe UniversitätMiguel Bernecker\, Goethe University FrankfurtWorking with data over the years results almost inevitably in self-made code snippets\, scripts or spreadsheets\, and sometimes even full-fledged programmes that optimise workflows\, reduce workload and significantly speed up daily tasks. Some of them make it to the public but most remain invisible\, hidden behind the outcomes of the research they are helping with. However\, many of them are not shy but did not have the possibility to shine\, yet. We provide a spotlight for them\, so that the scientific community may benefit. We welcome presentations about all kinds of self-made software that facilitate our research. The presented tools can be written in any programming language and be in any stage of their development. We aim to raise awareness of what is already out there\, to facilitate sharing of the tools and to foster collaborations for their development. \n\n\n\n14b – Engaging with a variety of communities: a workshop-style session to discuss issues\, ideas\, and practical solutions for more effective outreachGeorgia G Soares\, Penn State UniversityBonnie Teece\, University of New South WalesIndrani Mukherjee\, University of New South WalesErica V. Barlow (she/her)\, Pennsylvania State UniversityThere are significant barriers to the implementation and progression of education and outreach activities\, particularly in the practical aspects of how to begin creating a diverse network and in co-creating and designing the activities. These barriers are especially apparent\, for example\, where fieldwork and research are performed and for early career researchers (ECRs) setting up new connections. This workshop-style session has two parts. The first part will bring together expertise from across the world to explore practical (rather than theoretical) ways of executing meaningful and impactful activities. Several experts (or “big issue” guides) will facilitate interactive discussions surrounding outreach with a variety of different communities. Topics of discussion may include co-creating decolonised outreach activities\, engaging with indigenous communities\, creating activities that capture students and/or communities from low SES backgrounds\, disability-inclusive outreach and education\, and using newer\, less traditional mediums (podcasts\, film\, social media\, etc.). Experts will lead smaller group discussions during this interactive workshop-style session and share how they engage with communities\, including lessons learned\, and encourage participants to share their experiences during outreach. At the end of this part of the session we will come together\, and each facilitator will share the ideas and practical solutions discussed in their groups. The second part is a poster session where submitters can highlight their own efforts relating to outreach people are attempting to start\, are currently engaged in\, and/or are trying to progress. Poster submissions will also shape the specific topics and issues that experts will discuss during this workshop-style session. \n\n\n\n14e – Initiatives to advance diversity\, equity\, and inclusion in geochemistrySusan H Little\, University College LondonJennifer L Middleton\, Columbia UniversityLAlastair J M Lough\, University of LeedsPallavi Anand\, The Open UniversityGeochemistry is a uniquely varied discipline\, spanning Chemistry\, Earth\, Planetary and Environmental Sciences. However\, this disciplinary diversity comes with unique challenges to fostering a diverse and inclusive community\, partly linked to inequitable access to resources and the combination of lab-\, field- and office-based approaches that geochemical research requires. In this session\, we invite presentations that assess the obstacles that contribute to the under-representation of marginalized groups within geochemistry and that suggest best practices and innovative ideas to remove those obstacles. Topics may include\, but are not limited to: data relating to professional representation (e.g.\, in awards\, medals\, grants\, graduate programs\, high-level positions\, invited talks\, papers\, journal editorships); evidence of barriers to inclusion\, personal\, institutional\, or cultural; and novel strategies and best practices to identify and overcome these barriers (e.g.\, mentoring\, networks\, funding\, institutional initiatives\, national or international policies or schemes). Abstracts to this session will be free of charge and will not prevent the submission of an abstract to another theme as presenting author. \n\n\n\n14f – History of GeochemistryJérôme Gaillardet\, IPGPWilliam M. White\, Cornell UniversityGeochemistry was not born yesterday. For example\, the multiplication of advanced analytical tools that make our daily work so fascinating in 2022 result from centuries of incremental or transformative technological innovations\, as well as from a succession of conceptual advances in the fields of physics\, chemistry\, Mathematics and Ecology. Those roots tend to be forgotten\, and this is detrimental to the quality of our science\, and our understanding of it. This session aims to explore the historical roots of geochemistry along two main directions. First\, a direction where geochemistry is conceived as a practical science based on advanced analytics\, which are only the outcome of centuries of creative technological inventions\, developments and measurements. Secondly\, geochemistry as a conceptual framework inheriting centuries of advances in the understanding of the structure and properties of matter\, light\, and other critical concepts of the geological sciences in general. All contributors who want to share with us their insights on the historical roots of our science and their pedagogical implications are welcome. A priority\, if needed\, will be given to early career scientists without discrimination for institution\, race\, etc.
URL:https://www.geotraces.org/event/39294/
CATEGORIES:GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230604T000000
DTEND;TZID=Europe/Paris:20230609T235959
DTSTAMP:20260424T103128
CREATED:20221202T090156Z
LAST-MODIFIED:20230524T144905Z
UID:39241-1685836800-1686355199@www.geotraces.org
SUMMARY:ASLO 2023\, Aquatic Science Meeting
DESCRIPTION:Palma de Mallorca\, Spain \n\n\n\nResilience and Recovery in Aquatic Systems\n\n\n\nConcepts of resilience and recovery do not only apply to aquatic ecosystems but also to societies when faced with disruptions and crises. Past events have shown that adaptability and decisiveness are important keys to resilience and recovery. Disruptions are opportune moments for setting up strategies for management and recovery. Faced with the COVID-19 pandemic\, ASLO meetings have adapted by transforming the ASM 2021 Palma meeting to virtual with a positive attitude that in 2023 we will recover and meet in-person. \n\n\n\nWe will incorporate the theme of resilience and recovery in aquatic systems into the plenary sessions and encourage submissions that examine these topics and invite you to contribute special sessions on topics relevant to freshwater and marine ecosystems.   \n\n\n\nFor further information: https://www.aslo.org/palma-2023/ \n\n\n\nGEOTRACES and GEOTRACES-related sessions:\n\n\n\n**SS014 Atmospheric Supply of Soluble Trace Elements and Isotopes: Advances and Challenges\n\n\n\nRachel Shelley\, University of East Anglia (rachel.shelley@uea.ac.uk)Susanne Fietz\, University of Stellenbosch (sfietz@sun.ac.za)Alex Baker\, University of East Anglia (alex.baker@uea.ac.uk)Morgane Perron\, CNRS – Laboratoire des sciences de l’Environnement MARin (LEMAR) (morgane.perron@utas.edu.au) \n\n\n\nApproximately 50% of primary production occurs in the oceans. Iron (Fe)\, and other trace elements (TEs)\, are essential micronutrients as primary producers require Fe for carbon (C)\, nitrogen (N) and phosphorus (P) acquisition. However\, in vast areas of the ocean\, marine production is limited by insufficient Fe availability or by the scarcity of a combination of two or more micronutrient TEs. Therefore\, the availability of TEs\, particularly Fe\, exerts a fundamental control on marine biological activity\, from bacterial and primary productivity of phytoplankton through to the fisheries which ultimately depend on them. Micronutrient TEs thereby support marine ecosystem services and CO 2 sequestration in most ocean basins and over various timescales. Atmospheric deposition provides an external source of TEs to the surface ocean. Large deposition events can relieve micronutrient (co-)limitation through the partial dissolution of TEs from aerosols. However\, large deposition events are sporadic and currently poorly understood. This presents a challenge for predicting how ocean ecosystems will respond to changes in soluble TE fluxes in the future. Therefore\, it is vital that models are able to represent and reproduce current and past TE distributions in the ocean in order to improve predictive capabilities. A further challenge is understanding how the different chemical compositions and atmospheric processing of natural and anthropogenic particles impacts TE solubility following deposition to seawater and\, thus\, the ability of biota to assimilate the TEs. Although mineral dust is proportionally the largest source of aerosol TEs to the global ocean\, anthropogenic and wildfire aerosols have a greater ability to dissolve in seawater. This results in the liberation of a larger fraction of bioaccessible TEs\, due to several factors. Following aerosol deposition\, new resource competition among primary producers can alter community structure and dynamics\, which influences the capacity of the ocean to sequester CO 2 \, fix nitrogen and produce biological gases which readily form cloud condensation nuclei. All three features exert crucial climate feedbacks. The degree to which autotrophs or heterotrophs are stimulated or suppressed by atmospheric deposition depends on the physicochemical form in which atmospheric TEs are delivered to seawater and on the initial nutrient status of the water. Again\, highlighting the need for a more integrated understanding of biogeochemical cycling including the atmospheric component. In this session\, we would like to invite submissions from novel experimental and modelling work on TE biogeochemistry at the air-sea interface. Presentations addressing key research questions including the controls on dissolution and/or uptake of aerosol TEs\, as well as modelling estimates of aerosol TE deposition fluxes in the present\, past\, or future are welcomed. Studies focusing on the Southern Hemisphere and other historically under-studied oceanic regions are particularly encouraged. This session has broad applicability to different research communities\, e.g.\, climate change\, human health\, fisheries\, and paleoclimate. As such\, we welcome cross-disciplinary submissions which address questions about the flux of TEs across the air-sea interface and the associated impact on marine ecosystems. \n\n\n\n**SSO38 Trace Metal and Macronutrient Behaviour in Large Rivers and Estuaries \n\n\n\nAdrienne Hollister\, Jacobs University Bremen (a.hollister@jacobs-university.de)Hannah Whitby\, University of Liverpool (hannah.whitby@liverpool.ac.uk)Rebecca Zitoun\, GEOMAR Helmholtz Centre for Oceanographic Research (rzitoun@geomar.de)Juan Santos-Echeandía\, Spanish Institute for Oceanography (juan.santos@ieo.csic.es) \n\n\n\nRivers are a major source of trace metals\, macronutrients and organic matter to the global oceans. Processes such as colloidal flocculation\, particle adsorption-desorption and biological activity influence the concentrations and speciation of trace metals and nutrients during estuarine mixing\, and therefore their overall behaviour and flux to the ocean. Major rivers such as the Amazon are becoming increasingly vulnerable to anthropogenic impacts\, including land use change\, hydroelectric dams\, metal pollution (e.g. from mining)\, plastic pollution (relevant as metal vectors)\, and agricultural runoff. These and other anthropogenic impacts to a river’s catchment area can lead to potentially toxic concentrations of metals (e.g. Cu\, Zn\, Pt\, Hg\, Pb\, Fe)\, or of macronutrients leading to eutrophication. In addition\, climate change is projected to cause both increased droughts and flooding\, resulting in changes in river flow and chemical output. These changes may have a drastic effect on trace metal and nutrient sources\, cycling\, transport\, fluxes\, reactivity and sinks at the land-ocean interface. As climate and land use changes amplify\, it is essential to establish a baseline for riverine trace metal and nutrient concentrations and fluxes to the ocean and sediments\, and to understand how these parameters may change with changing environmental conditions. Generally\, this session aims to evaluate the behaviour\, fluxes\, sources and sinks of trace elements and their isotopes (TEI) as well as macronutrients (N\, P\, Si) from major rivers to the ocean. Contributions focused on observational\, experimental\, and modelling approaches regarding metal- and nutrient cycling\, their chemical and biological transformation and distribution in rivers and estuaries are welcome. \n\n\n\nPosters\, presentations and hybrid presentations are welcome.  \n\n\n\n \n\n\n\nTown Hall\n\n\n\nSCOR Working Group 167\, RUSTED\, invites you to a Town Hall in the Sala Santa Catalina\, Palau de Congressos\, Palma de Mallorca at 13:30 on Wednesday 7 June 2023. \n\n\n\nConstraining the fluxes of micronutrient and pollutant trace elements (TEs) across the air-sea interface is a research priority of large international programmes such as SOLAS and GEOTRACES. RUSTED (Reducing Uncertainty in Soluble aerosol Trace Element Deposition) is the new SCOR Working Group 167. Our overarching objective is to assure the quality of TE solubility data produced from aerosol dissolution experiments and to improve the handling of such data in Earth System models. \n\n\n\nThe purpose of the Townhall is to: 1) introduce RUSTED to the Aquatic Sciences community\, 2) invite aerosol TE data contributions for inclusion in a new database and 3) assess research interests and understand barriers to participation in a workshop planned for 2025. \n\n\n\nBeyond improving understanding of air-sea biogeochemical exchanges\, RUSTED outcomes will be a valuable resource for other fields\, such as health and climate research. This Townhall will provide a unique opportunity to network with RUSTED members. \n\n\n\nFurther information about RUSTED is available here: https://www.geotraces.org/new-scor-working-group-rusted/
URL:https://www.geotraces.org/event/aslo-2023-aquatic-science-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230515T000000
DTEND;TZID=Europe/Paris:20230519T235959
DTSTAMP:20260424T103128
CREATED:20221214T102732Z
LAST-MODIFIED:20230214T103238Z
UID:39326-1684108800-1684540799@www.geotraces.org
SUMMARY:AGU Chapman Conference
DESCRIPTION:There will be an AGU Chapman conference held in Cyprus\, May 15-19\, 2023 on the role of oceanic hydrothermal systems in ocean chemistry: \n\n\n\nAGU Chapman ConferenceHydrothermal Circulation and Seawater Chemistry: What’s the chicken and what’s the egg?Agros\, Cyprus | 15-19 May 2023Website: https://www.agu.org/Chapman-Hydrothermal-Circulation-Seawater-Chemistry \n\n\n\nSession topics include: \n\n\n\n– What processes and boundary conditions control high-temperature (on-axis) hydrothermal fluxes?– What processes and boundary conditions control low-temperature (off-axis) hydrothermal fluxes?– How do hydrothermal fluxes vary in space and time in the modern and recent ocean?– How did hydrothermal fluxes vary over the Phanerozoic under different boundary conditions?– What might control hydrothermal fluxes on habitable exoplanets and the early Earth? \n\n\n\nAbstracts on all aspects of the role of hydrothermal input into the ocean are welcome and the abstract submission deadline is 25th January 2023. Feel free to reach out to any of the conveners if you have questions about the meeting.
URL:https://www.geotraces.org/event/agu-chapman-conference/
CATEGORIES:GEOTRACES Relevant Special Sessions
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DTSTART;TZID=Europe/Paris:20230423T000000
DTEND;TZID=Europe/Paris:20230428T235959
DTSTAMP:20260424T103128
CREATED:20221115T102324Z
LAST-MODIFIED:20230330T143511Z
UID:34957-1682208000-1682726399@www.geotraces.org
SUMMARY:EGU General Assembly 2023
DESCRIPTION:The EGU General Assembly 2023 (23–28 April 2023\, Vienna\, Austria and online) brings together geoscientists from all over the world to one meeting covering all disciplines of the Earth\, planetary\, and space sciences. The EGU aims to provide a forum where scientists\, especially early career researchers\, can present their work and discuss their ideas with experts in all fields of geoscience. \n\n\n\n\n\n\n\n\n\n\n\nGEOTRACES session: \n\n\n\n\n\n\n\nOS3.1\, Response of ocean biogeochemical cycles to past\, present and future climate changeConvener: Alessandro Tagliabue | Co-conveners: Charlotte Laufkötter\, Christopher Somes\, Camille Richon \n\n\n\nhttps://meetingorganizer.copernicus.org/EGU23/session/45681 \n\n\n\nAbstract submissionClimate induced alterations to net primary production act alongside changes to biogeochemical cycling of oxygen and nutrients to affect marine ecosystem structure and function\, as well as the ocean carbon cycle on decadal to centennial timescales. Climate change is driving alterations to these key components of ocean health\, both via long term changes and the emergence of extremes. The 6th Climate Model Intercomparison Project provides new opportunities to analyze the long-term changes in biogeochemistry under different emissions scenarios\, as well as to explore the emergence and potential impacts of extremes. Additionally\, historical variability linked to climate oscillations such as ENSO and the Southern Annular Mode provide an opportunity to bring insights from observed changes and impacts. Moreover\, isotope systems and proxies are often used in paleoclimate and paleoceanography across geologic timescales of climate change to interpret past environmental changes in Earth’s history. Their interpretation relies heavily on these isotope systems’ budget in the ocean. \n\n\n\nThis session invites submissions\, from both observations and modelling efforts\, that address the impact of climate change operating over multiple timescales on net primary production\, biogeochemical cycling of nutrients and oxygen\, and the ocean carbon cycle\, including cascading effects for marine ecosystems to modulate biodiversity and ecosystem services.
URL:https://www.geotraces.org/event/egu-general-assembly-2023/
CATEGORIES:GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220710T000000
DTEND;TZID=Europe/Paris:20220715T235959
DTSTAMP:20260424T103128
CREATED:20220105T103311Z
LAST-MODIFIED:20220405T134032Z
UID:14095-1657411200-1657929599@www.geotraces.org
SUMMARY:Goldschmidt 2022
DESCRIPTION:Goldschmidt is the foremost annual\, international conference on geochemistry and related subjects\, organized by the Geochemical Society and the European Association of Geochemistry. Given the exceptional circumstances due to the current Covid-19 pandemic\, the Goldschmidt2022 Conference will take place in Honolulu and also online. \n\n\n\nGEOTRACES and GEOTRACES-related sessions:\n\n\n\n12a – The interplay between terrigenous fluxes and the biological pump as reflected by trace elements and their isotopes in the oceans\n\n\n\nConveners:Adi TorfsteinHebrew University of Jerusalem \n\n\n\nZanna ChaseInstitute for Marine and Antarctic Studies \n\n\n\nThe importance of the oceanic biological pump as a modulator of atmospheric CO2 levels and global climate cannot be overstated\, yet\, some fundamental aspects of its dyanamics are still not well understood\, such as the quantitative and qualitative impacts of terrigenous inputs into the oceans. These include dust\, river outflow\, glacial meltwater\, submarine groundwater discharge (SGD)\, and other processes along the margins\, all of which impose strong controls over the efficiency of the biological pump. Constraining their rates\, sources\, sinks and role in biogeochemical cycles is critical for achieving a full understanding of the dynamics of the biological pump.Here we seek contributions that utilize trace elements and their isotopes to describe the following non-exclusive topics: 1) Quantification and characterization of terrigenous inputs (dust\, rivers\, SGDs\, etc.) into the oceans and their impact on the marine environemnt\, 2) Studies of temporal and spatial patterns of terrigenous fluxes and their interplay with marine productivity and export production\, 3) Macro and micro scale interactions between terrigenous material and organic carbon\, 4) New methodologies and approaches to studying the role of trace elements in the marine biological pump. \n\n\n\nThe submission of multidisciplinary studies is encouraged\, including applications of organic geochemistry\, radionuclides\, experimental and analytical isotope geochemistry\, modeling\, and trace element phase partitioning. In addition\, we welcome time series –based studies\, both in the modern oceans as well as paleo records. \n\n\n\n\n\n\n\n12d – The Role Of Trace Metal Speciation (Physical And Chemical) At Marine Geochemical Interfaces\n\n\n\nConveners: \n\n\n\nCatherine JeandelLEGOS (Université de Toulouse\, CNRS/CNES/IRD/UPS) \n\n\n\nRebecca ZitounGEOMAR Helmholtz Centre for Ocean Research Kiel \n\n\n\nHélène PlanquetteUniversity Brest\, CNRS\, IRS \n\n\n\nSylvia SanderGEOMAR Helmholtz Centre for Ocean Research Kiel \n\n\n\nWilliam M. LandingFlorida State University \n\n\n\nAndrea KoschinskyJacobs University Bremen \n\n\n\nTrace metals exhibit a wide range of chemical\, physical\, and biological reactivities (e.g. oxidation\, precipitation\, sorption\, complexation\, toxicity) depending on their chemical and physical speciation (e.g. ions\, ion pairs\, organic and inorganic complexes\, colloids\, suspended particles). Thus\, the speciation of metals is of great importance not only to substantiate the geochemical fate of trace metals in the world’s ocean but also to estimate their availability and toxicity to marine biota. Geochemical interfaces are of particular interest because they exert a great control on trace metal cycling\, fluxes\, and rates and a full understanding of trace metal speciation along these boundaries is necessary for a more holistic understanding of the fate of trace metals in the marine environment. However\, despite decades of marine trace metal research\, we are still lacking knowledge of the speciation along geochemical interfaces (i) in space and time; (ii) the underlying driving processes; and (iii) their role for the global marine biogeochemical element cycles. Geochemical interfaces include sediment-water and atmosphere-water boundaries as well as regions with physicochemical gradients of density\, redox conditions\, temperature\, pH\, or salinity\, such as hydrothermal systems\, ground water discharges\, deep sea environments\, estuaries\, and coastal embayments. \n\n\n\nThis session brings together transdisciplinary scientists\, exploring trace metal speciation at various marine geochemical interfaces. We encourage contributions relating to novel analytical tools\, modelling approaches\, and laboratory-based experiments. \n\n\n\n\n\n\n\n14b: “Transport of particle-reactive elements from estuaries to open ocean: role of boundary exchange and oceanic internal cycling”\n\n\n\nConvenors:Kai DengETH Zürich \n\n\n\nMilena HorvatJožef Stefan Institute \n\n\n\nJianghui (JD) DuETH Zürich \n\n\n\nIgor ŽivkovićInstitute Rudjer BoškovićJožef Stefan Institute \n\n\n\nJennifer L MiddletonColumbia University \n\n\n\nParticle-reactive metals such as rare earth elements (REE)\, thorium (Th)\, mercury (Hg) etc. and their isotopes are powerful tracers for investigating the ocean biogeochemical cycles and can be applied to track e.g. continental weathering input\, transport of water mass and particle flux\, and anthropogenic emissions. For their robust applications across space and time\, it is crucial to obtain a comprehensive understanding of the physical-chemical processes controlling the behaviors of individual particle-reactive elements; the emphasis is on exchange at ocean interfaces via e.g. rivers\, atmospheric fallout and benthic dynamics and on internal cycling via e.g. scavenging and remineralization. Such knowledge based on the modern ocean can: 1) help resolve the long-standing debate arising from conflicting records of multiple particle-reactive isotopic systems in the geological past; 2) predict how anthropogenic emission and climate change scenarios will affect the cycling of key trace metals (e.g. toxic monomethylmercury; MMHg) in marine ecosystems. \n\n\n\nThis session invites observational\, experimental and modelling contributions on the distribution\, speciation\, flux and controls of particle-reactive metals from estuaries to open ocean\, with a particular interest in the interaction between seawater/porewater (including colloids) and lithogenic/biogenic particles. Multi-disciplinary and multi-proxy studies and contributions on advances in geochemical proxy development and in determination of metal speciation are especially welcome. This session focuses on processes and fluxes in the modern oceans\, but submissions on paleo-oceanographic and paleo-environmental reconstructions are also welcome. Early career scientists are particularly encouraged to contribute to this session.
URL:https://www.geotraces.org/event/virtual-goldschmidt-2022/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220224T000000
DTEND;TZID=Europe/Paris:20220304T235959
DTSTAMP:20260424T103128
CREATED:20210726T114338Z
LAST-MODIFIED:20220224T194639Z
UID:12610-1645660800-1646438399@www.geotraces.org
SUMMARY:Ocean Sciences Meeting 2022
DESCRIPTION:Virtual event.  \n\n\n\nWeb page: https://www.aslo.org/osm2022/ \n\n\n\n\n\n\n\nGEOTRACES Town Hall:\n\n\n\nTH33 Accessing and utilizing the GEOTRACES 2021 Intermediate Data Product (IDP2021) \n\n\n\nThe international GEOTRACES program aims to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean\, and to establish the sensitivity of these distributions to changing environmental conditions. GEOTRACES has just released a new intermediate data product (GEOTRACES IDP2021)\, combining data acquired during the first 10 years of the program. It contains datasets on trace elements that serve as micronutrients\, tracers of continental sources to the ocean (e.g.\, aerosols and boundary exchange)\, contaminants (e.g.\, Pb and Hg)\, radioactive and stable isotopes used in paleoceanography and a broad suite of hydrographic parameters used to trace water masses. IDP2021 expands on\, and includes\, the collection of results from the Atlantic\, Pacific\, and Southern Oceans (IDP2014 and IDP2017) and includes new data from the Pacific\, Arctic and Indian Oceans. In addition\, IDP2021 includes a significant amount of BioGEOTRACES data on ligands\, enzymes\, and single cell quotas. IDP2021 will be of value to chemical\, biological\, and physical oceanographers\, especially those interested in biogeochemical cycles and the impact of micronutrients on marine carbon cycling. This Town Hall will introduce IDP2021\, explain how to access IDP2021\, and include some highlights on the use of GEOTRACES data. The goal is to intensify collaboration within the broader ocean research community but also seek feedback from the community to help us improve future data products. \n\n\n\nLead Organizer: William Landing\, Florida State University\, wlanding@fsu.edu \n\n\n\nDate and Time: Friday\, 2/25/2022 11:00 AM to 2/25/2022 12:00 PM (US EST) Location: Room 02 \n\n\n\nProgramme: \n\n\n\n\n– IntroductionBill Landing (Florida State University\, USA) \n\n\n\n– Introduction to GEOTRACES and to the GEOTRACES Intermediate Data Product 2021 (IDP2021)Catherine Jeandel (LEGOS\, Université de Toulouse\, CNES/CNRS/IRD/UT3\, Toulouse\, France)– Accessing the IDP2021Reiner Schlitzer (Alfred Wegener Institute (AWI)\, Bremerhaven\, Germany)– Education: Working with IDP2021 and webODV Explore toolPhoebe Lam (University of California\, Santa Cruz\, USA)– Exploration: Linking TEI and genomics data in IDP2021Maite Maldonado (University of British Columbia\, Vancouver\, Canada)– How can researchers register data for next IDP – The DOoR PortalBill Landing (Florida State University\, USA)– Q&A with speakersChaired by: Bill Landing (Florida State University\, USA) / Catherine Jeandel (LEGOS\, Université de Toulouse\, CNES/CNRS/IRD/UT3\, Toulouse\, France) \n\n\n\n\n \n\n\n\nGEOTRACES sessions:\n\n\n\nCT01 Temporal Variability of Bioactive Trace Elements in the Ocean: Towards Constraining Drivers\, Mechanisms and Timescales \n\n\n\nOrganizers:Peter Sedwick\, psedwick@odu.eduErin Black\, erinb@ldeo.columbia.eduAlessandro Tagliabue\, a.tagliabue@liverpool.ac.ukSimon Ussher\, simon.ussher@plymouth.ac.uk \n\n\n\nIn the past decade\, our understanding of the distribution of bioactive trace elements has improved greatly\, advancing the development of numerical models that provide mechanistic insight and predictive capability. However\, in addition to establishing the spatial distribution of biologically active trace elements\, it is equally important to understand their temporal variability. Such information provides critical constraints on the mechanisms that control the biogeochemical cycling of these elements\, and allows the assessment and expansion of numerical modeling efforts. In this session\, we invite interdisciplinary contributions from both observationalists and modelers that examine the time variation of bioactive trace elements in the ocean\, from both chemical and biological perspectives\, over timescales ranging from daily to millennial. \n\n\n\nCT03 Advances in understanding of the biogeochemical processes shaping the basin-scale distributions of trace elements and their isotopes \n\n\n\nOrganizers:Tim Conway\, tmconway@usf.eduLauren Kipp\, kipp@rowan.eduJessica Fitzsimmons\, jessfitz@tamu.eduGreg Cutter\, gcutter@odu.edu \n\n\n\nA range of important trace elements act as micronutrients\, toxins\, or tracers throughout the global oceans. The distributions of these trace elements are shaped by a range of biotic and abiotic processes including external sources and sinks\, microbial uptake and regeneration\, exchange with particles\, and physical circulation of the oceans. In recent years\, field programs such as GEOTRACES\, CLIVAR\, and SOLAS have hugely expanded the available datasets of trace elements and their isotopes (TEIs) throughout the oceans. These and other datasets are being used to determine the processes\, sources\, and sinks that control observed TEI distributions\, and the transformations and rates of input\, removal\, and exchange associated with each process. Here\, we invite submissions of abstracts using ocean transect\, field\, laboratory\, or modelling datasets that focus on the distribution\, isotopic composition\, speciation\, and cycling of TEIs at the basin-scale\, as well as abstracts which use geochemical tracers to interrogate the internal cycling and source/sink processes which shape these basin-scale distributions or transform TEIs within the ocean. In addition to studies that yield insights into the current distributions and cycling of TEIs\, we also invite submissions that investigate how the oceanic cycling of TEIs may change in response to the changing oceans and warming climate. \n\n\n\nCT10 Sources\, sinks\, and cycling of trace elements in coastal and near-shore systems \n\n\n\nOrganizers:David Janssen\, janssen.davej@gmail.comVeronique Oldham\, voldham@uri.eduEmily Estes\, estes@iodp.tamu.edu \n\n\n\nThe terrestrial-ocean continuum regulates the delivery of trace elements to the global ocean; however\, important gaps remain in understanding the complex cycling of trace elements in coastal systems. Further\, coastal systems face significant pressure from anthropogenic climate change\, nutrient loading\, and inputs of environmental toxins. This session aims to connect GEOTRACES-style studies on distributions of trace elements with studies examining processes and cycling of trace elements in nearshore environments to better bridge the terrestrial-ocean continuum. We invite contributions examining the cycling of trace elements and their isotopes in rivers\, wetlands and estuaries; inlets\, marginal seas and inland seas; and the near-shore coastal ocean. Field\, laboratory\, and modelling studies of trace element distributions\, speciation\, biological transformations\, sources and sinks\, and pollution & remediation are welcome. We particularly encourage studies (1) on the transport of terrestrially-sourced metals and dissolved organic matter to near-shore environments; (2) on metal fluxes to and from shelf sediments; (3) linking processes regulating near-shore trace element availability and their impact on the biosphere; and (4) investigating natural and anthropogenic perturbations on trace element cycling in these systems. \n\n\n\nCT11 Mercury transformations in marine ecosystems \n\n\n\nOrganizers:Eric Capo\, eric.capo@hotmail.frAmina Schartup\, aschartup@ucsd.eduHeyu Lin\, heyu.lin@student.unimelb.edu.auLars-Eric Heimbürger\, lars-eric.heimburger@mio.osupytheas.fr \n\n\n\nMercury (Hg) is a naturally occurring element that has been mined and released by humans for millennia. Inorganic Hg is released by natural processes such as volcanic activity\, and also by human activities which have largely outweighed natural ones. We have known for half a century that methylmercury is naturally formed in marine sediment and water column from inorganic Hg and is a potent neurotoxicant. The majority of global methylmercury exposure for human populations is from marine ecosystems due to its bioaccumulation in predatory fish at levels that are a million times\, or more\, higher than seawater. Yet our understanding of abiotic and biotic Hg transformations in marine systems is still limited. A greater understanding of the microbial reactions and geochemical conditions conducive to the formation and degradation of methylmercury is needed to mitigate its impacts on the health of fish-consuming wildlife and human populations. This session invites presentations on Hg transformations in marine ecosystems. \n\n\n\nOB20 Towards BioGeoSCAPES: Linking cellular metabolism with ocean biogeochemistry \n\n\n\nOrganizers:Adrian Marchetti\, amarchetti@unc.eduYoshiko Kondo\, yoshikondo@nagasaki-u.ac.jpNaomi Levine\, n.levine@usc.eduDalin Shi\, dshi@xmu.edu.cn \n\n\n\nBioGeoSCAPES is an international program initiative aimed at integrating knowledge on organism identity and physiology within frameworks of community ecology and global ocean biogeochemistry. It is envisioned that an improved\, predictive\, and quantitative understanding of ocean metabolism on a changing planet can be achieved by combining detailed information on plankton (i.e.\, virio-\, bacterio-\, phyto- and zoo-) cell status\, biochemical processes\, and species interactions with intercalibrated measurements of nutrient fluxes\, concentrations\, and speciation (e.g.\, macronutrients\, including inorganic and organic carbon\, micronutrients and vitamins). We invite contributions describing research that can serve as inspiration for this nascent program. Appropriate abstracts could include: studies that integrate cellular metabolism through physiological and ‘omics approaches (e.g.\, genomic\, transcriptomic\, proteomic\, metabolomic\, metallomic\, lipidomic\, etc.) with biogeochemical measurements\, including fluxes; or studies that scale from the cellular to the ecosystem level through integrated field measurements or mechanistic models of interactions. With the COVID-19 pandemic significantly impacting field research opportunities\, we are particularly interested in laboratory and modelling studies that provide new insights into BioGeoSCAPES-related topics across different scales of time and space. \n\n\n\nHL11 Arctic Ocean processes\, progress\, and potential explored through synthesis supported research \n\n\n\nOrganizers:Laura Whitmore\, lmwhitmore@alaska.eduLaramie Jensen\, jensenla@uw.eduRyan McCabe\, rmccabe.ocean@gmail.com \n\n\n\nSession Abstract:The Arctic Ocean is changing rapidly as a result of global climate change at rates disproportionate to other ocean basins. Changes in stratification\, circulation\, and ice cover are giving way to a cascade of biogeochemical and ecological changes that are altering the character of the Arctic Ocean. These changes influence the global ocean by modulating freshwater export from the Arctic Ocean to the North Atlantic Ocean\, the transfer of chemical constituents\, and the connectivity of organismal populations. Because of continued annual sea ice coverage and accessibility barriers; data collection across small (seasonal) and larger (annual to decadal) timescales has been historically difficult. In order to elucidate and ultimately predict the impacts of climate change on the Arctic Ocean system a synthetic and trans-disciplinary effort is valued. In this spirit\, we encourage submissions across ecological\, chemical\, physical\, and geological sub-disciplines with special consideration to interdisciplinary approaches and to studies investigating spatial and/or temporal scales.
URL:https://www.geotraces.org/event/ocean-sciences-meeting-2022/
LOCATION:Hawaii Convention Center\, Honolulu\, HI\, United States
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20211213
DTEND;VALUE=DATE:20211218
DTSTAMP:20260424T103128
CREATED:20210618T081643Z
LAST-MODIFIED:20210826T142651Z
UID:12284-1639353600-1639785599@www.geotraces.org
SUMMARY:AGU Fall Meeting 2021
DESCRIPTION:The abstract submission deadline is 4 August 2021 at 23:59 EDT/03:59 +1 GMT. \n\n\n\nTo submit an abstract: https://www.agu.org/Fall-Meeting/Pages/Present/Abstracts \n\n\n\nGEOTRACES session:\n\n\n\nPP024. Refinement of paleo-proxies in the GEOTRACES era \n\n\n\nhttps://agu.confex.com/agu/fm21/webprogrampreliminary/Session117493.html \n\n\n\nSession Description: \n\n\n\nOur knowledge of the past ocean relies upon measurable quantities in the sedimentary record that represent past conditions. The development of these proxies is driven by linking relationships between processes in the modern ocean and the transfer of signals into preserved archives\, ranging from bulk sediment to species-specific fossils. The international GEOTRACES program has been surveying the global ocean distribution of trace elements and isotopes\, many of which have specific paleoceanographic applications\, including protactinium-thorium ratios and neodymium isotopes. Furthermore\, the advancements GEOTRACES has made in the understanding of micronutrient metals\, redox sensitive metals and nutrient isotopic ratios also have significant implications for our understanding of past ocean circulation\, biological productivity\, particle Kuxes and climate. In this session we welcome abstracts focusing on either modern or past ocean systems that speak to the development\, calibration\, or modeling of proxies and/or any associated updates to our proxy-based understanding of ocean conditions \n\n\n\nCo-conveners: Christopher Hayes\, Kazuyo Tachikawa\, Kassandra Costa and Jesse R Farmer.
URL:https://www.geotraces.org/event/agu-fall-meeting-2021/
LOCATION:New Orleand and Online\, United States
CATEGORIES:GEOTRACES,GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210704
DTEND;VALUE=DATE:20210710
DTSTAMP:20260424T103128
CREATED:20210119T092952Z
LAST-MODIFIED:20210726T122748Z
UID:11144-1625356800-1625875199@www.geotraces.org
SUMMARY:Virtual Goldschmidt 2021
DESCRIPTION:Goldschmidt is the foremost annual\, international conference on geochemistry and related subjects\, organized by the Geochemical Society and the European Association of Geochemistry. Given the exceptional circumstances due to the current Covid-19 pandemic\, the Goldschmidt2021 Conference will be an online meeting. \n\n\n\nGEOTRACES session: \n\n\n\n13a. Marine biogeochemistry: Particle fluxes and dissolved trace element cycling from source to sink \n\n\n\nConveners: Adi Torfstein\, Hebrew University of JerusalemPhoebe Lam\, University of California\, Santa CruzWilliam B Homoky\, University of LeedsErin Black\, Lamont-Doherty Earth ObservatoryAmber Annett\, University of SouthamptonChristopher T Hayes\, University of Southern Mississippi \n\n\n\nProvisional keynote:Claudia Benitez-Nelson\, University of South Carolina \n\n\n\nThe compositions of seawater and marine particulate material\, and their temporal and spatial fluxes and exchange\, play a pivotal role in modulating the biological pump and atmospheric CO2 uptake\, as well as various biogeochemical processes in the oceans. Determination of the inputs\, settling fluxes\, remineralization rates\, chemical scavenging and the linkage of particles to seawater composition and marine productivity\, are therefore critical for a full understanding of marine biogeochemical cycles and their impact on global climate. \n\n\n\nHere we seek contributions on the following non-exclusive topics: (1) new methodologies for determination of trace element concentrations\, isotopic compositions\, or particle flux rates\, (2) new approaches to characterize particle compositions\, including across size classes\, mineralogical phases or different environments\, or (3) the interactions between particles and dissolved distributions. We encourage submissions of multi-disciplinary studies\, such as GEOTRACES or other programs\, including applications of radionuclides\, experimental and analytical isotope geochemistry\, modeling\, and trace element partitioning between solid\, colloidal and dissolved phases. We focus on studies that describe processes in the modern oceans but submissions discussing paleoceanographic conditions are welcome. We further seek studies that focus on the interplay between external sources (e.g.\, dust\, rivers\, margins)\, surface productivity and marine particulate and dissolved compositions and fluxes.
URL:https://www.geotraces.org/event/2021-goldschmidt-conference/
LOCATION:Lyon & on-line\, France
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210622
DTEND;VALUE=DATE:20210628
DTSTAMP:20260424T103128
CREATED:20210216T125758Z
LAST-MODIFIED:20210726T122712Z
UID:11281-1624320000-1624838399@www.geotraces.org
SUMMARY:ASLO 2021\, Aquatic Sciences Meeting
DESCRIPTION:Virtual Meeting\n\n\n\nAquatic Sciences for a Sustainable Future:  Nurturing Cooperation\n\n\n\nInitially this meeting was scheduled to be held in Palma\, but due to COVID-19\, it is necessary to hold the ASLO 2021 Aquatic Sciences Meeting virtually. However\, organisers plan to meet in Palma in 2023. \n\n\n\nEvent website: https://www.aslo.org/2021-virtual-meeting/ \n\n\n\nGEOTRACES and GEOTRACES related sessions:\n\n\n\n*SS63 Towards a mechanistic understanding of metal-microbe interactions in the Oceans\n\n\n\nMartha Gledhill\, GEOMAR Helmholtz Center for Ocean ResearchYeala Shaked\, Interuniversity Institute for Marine Sciences & The Fredy and Nadine Herrmann Institute of Earth Sciences\, Hebrew University of Jerusalem\, JerusalemIngrid Obernosterer\, Microbial Oceanography Laboratory(LOMIC)\, CNRS-Sorbonne University \n\n\n\nTrace metals are essential for life\, catalysing key cellular reactions which then govern patterns of ocean fertility and biodiversity. Fundamental in this regard are the ways in which ocean microbes acquire essential metals and how biological activity is affected by metal availability. Diverse microbial community members can compete for this scarce resource\, and trace-metal related metabolic functions can also be partitioned among taxa and benefit the whole population. Defining these interactions is critical for understanding the relationship between metabolic rates and elemental cycles in the ocean. Developments in this field are being led by advances in analytical chemistry\, nanotechnology\, molecular biology\, and bioinformatics\, as well as the expansion of ‘omics’-related observations of in-situ microbial communities\, and within the context of high resolution geochemical such as obtained as part the international GEOTRACES program. In this session we invite contributions that bring together insights from these different disciplines to better understand how microbial activity\, diversity and ecology is shaped by interactions with trace metals over different space and time scales. By linking across disciplines\, there is the potential to develop the mechanistic understanding required to inform the ecological and biogeochemical models we rely on for testing hypotheses and projecting the impacts of ocean change that will result from the impending BioGeoScapes program. We are specifically interested in contributions that address (i) metal uptake and interactions between microbes for metal resources\, (ii) how microbes adapt their physiology to metal scarcity and varied supply\, and (iii) how trace metals shape microbial activity and diversity in the ocean. \n\n\n\n*SS03 Distribution and impacts of ocean nutrient limitation\n\n\n\nThomas Browning\, GEOMAR Helmholtz Centre for Ocean Research KielMark Moore\, University of SouthamptonErin Bertrand\, Dalhousie UniversityAlessandro Tagliabue\, University of Liverpool \n\n\n\nNutrient limitation constrains primary production throughout the global ocean and regulates its responses to climate change. A broadscale picture of nutrient limitation in the current ocean has emerged\, with nitrogen limitation revailing in the stratified subtropical gyres and iron limitation in open ocean and some coastal upwelling regions. However\, new research is rapidly adding important detail to this simple picture. Evidence continues to accumulate for co-limitation between these and other nutrients\, including additional trace elements and vitamins. Such (co-)limitations are likely set by nutrient supply and removal mechanisms to and from the surface ocean\, phytoplankton elemental stoichiometry\, as well as microbial interactions within communities that are simultaneously under the influence of multiple additional abiotic (light\, temperature) and biotic (grazing\, viral lysis) controls. To understand this complexity\, new approaches ranging from advances in ‘-omics’ capabilities\, coordinated cruise programmes and autonomous platform observations\, through to alternative mathematic constructions of nutrient limited growth rates\, are being utilized. Such advances are urgently needed to better understand the drivers and impacts of oceanic nutrient limitation\, as well as meeting the needs of testing and improving Earth System Model simulations projecting the impacts of climate change. This session invites contributions utilizing in situ\, experimental\, and modelling approaches that represent new advances in understanding oceanic nutrient limitation. These could range from those describing the basic distribution and identity of limiting nutrients for diverse microbial groups to understanding the mechanisms\, impacts\, and future development of nutrient limitation in the ocean. \n\n\n\nThe full session list of sessions is available at: https://www.aslo.org/2021-virtual-meeting/session-list/
URL:https://www.geotraces.org/event/aslo-2021-aquatic-sciences-meeting/
LOCATION:Virtual Meeting\, VA
CATEGORIES:GEOTRACES Relevant Special Sessions
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END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210604
DTEND;VALUE=DATE:20210625
DTSTAMP:20260424T103128
CREATED:20210427T075405Z
LAST-MODIFIED:20220217T151429Z
UID:11905-1622764800-1624579199@www.geotraces.org
SUMMARY:OCB Summer Workshop
DESCRIPTION:Registration is free and open to all. If you are interested in attending part or all of the OCB workshop\, you must register in order to receive connection information for the virtual sessions. Connection information will be sent out a few days before each session. Please register by June 1. \n\n\n\nGEOTRACES will be present at the OCB Networking sessions: \n\n\n\nMonday\, June 7 from 3:30-5:00 pm EDT – Catherine Jeandel and Elena Masferrer (GEOTRACES IPO)Tuesday\, June 15 from 12:30-1:30 pm EDT – Maite Maldonado\, Bob Anderson and Elena MasferrerTuesday\, June 22 from 4:45-5:30 pm EDT – Catherine Jeandel and Bob Anderson.\n\n\n\nOCB2021 plenary topics: \n\n\n\nBridging the divide between ocean biology and geochemistry (Chairs: Dreux Chappell\, Adam Martiny\, Patrick Rafter)Optical biogeochemistry: Above and below the waterline (Chairs: Amy Maas\, Seth Bushinsky\, Maria Tzortziou)Ocean-based negative emissions technologies (Chairs: Lennart Bach\, Jaime Palter\, Clare Reimers\, Patrick Rafter)Ocean Worlds (Chairs: Laura Lorenzoni\, Chris German\, Alison Murray\, Ashley Kleinman\, Paula Bontempi\, Adam Martiny)Opportunities and Challenges in Ecological Forecasting (Chairs: Victoria Coles\, Marjorie Friedrichs\, Charlie Stock\, Susanne Menden-Deuer\, Raleigh Hood)\n\n\n\nOCB will kick off with a virtual early career mixer on June 4. Virtual partial day OCB sessions are tentatively planned for June 7\, 11\, 15\, 18\, 22\, and 24. In addition to plenary sessions\, OCB 2021 will include targeted community discussions on OCB-relevant topics\, OCB activity updates\, early career and agency program manager networking events\, virtual poster sessions\, and more!
URL:https://www.geotraces.org/event/ocb-summer-workshop/
LOCATION:Virtual Meeting\, VA
CATEGORIES:GEOTRACES Relevant Special Sessions
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END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201201
DTEND;VALUE=DATE:20201218
DTSTAMP:20260424T103128
CREATED:20200824T092824Z
LAST-MODIFIED:20210726T122336Z
UID:8867-1606780800-1608249599@www.geotraces.org
SUMMARY:AGU Fall Meeting
DESCRIPTION:GEOTRACES-related session: \n\n\n\nTitle: Advances in Understanding Meridional Overturning Circulation from Past to Future: Insights from Multiple Approacheshttps://agu.confex.com/agu/fm20/meetingapp.cgi/Session/110375 \n\n\n\nAbstract:The Meridional Overturning Circulation (MOC) is a major driver of Earth’s climate and biogeochemical cycling on many timescales. Modern oceanographic observations and modeling studies are making great advances in understanding MOC dynamics\, predictability\, and connections to Earth’s systems over seasonal to decadal periods. Meanwhile\, paleoclimate observations and modeling studies have highlighted the close link between changes in the climate system and variations in the structure and/or magnitude of MOC over multi-decadal to tectonic timescales. Much remains to be understood about the interplay between MOC changes and the cryosphere\, atmosphere\, and ocean biogeochemistry\, as well as mechanisms driving past\, present and future MOC variations. Modern and Paleo approaches are complementary and together bring new insights into MOC dynamics and predictability under future climate conditions. This session welcomes theoretical\, modeling\, and observation-based studies that investigate the nature\, stability and sensitivity of the MOC to external forcing and internal feedbacks across seasonal-to-tectonic timescales. \n\n\n\nPrimary ConvenersKelly H KilbourneUniversity of Maryland Center for Environmental Science Chesapeake Biological Lab \n\n\n\nConvenersFeng HeUniversity of Wisconsin-MadisonXu ZhangLanzhou UniversityJulia GottschalkLamont-Doherty Earth Observatory\, Columbia University of the City of New York
URL:https://www.geotraces.org/event/agu-fall-meeting/
LOCATION:Virtual Meeting\, VA
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200621
DTEND;VALUE=DATE:20200627
DTSTAMP:20260424T103128
CREATED:20200304T100108Z
LAST-MODIFIED:20210726T122204Z
UID:5728-1592697600-1593215999@www.geotraces.org
SUMMARY:Virtual Goldschmidt 2020
DESCRIPTION:Goldschmidt is the foremost annual\, international conference on geochemistry and related subjects\, organized by the Geochemical Society and the European Association of Geochemistry. \n\n\n\nGEOTRACES session: \n\n\n\n14m: Biogeochemical Cycling of Trace Elements and their Isotopes in the Oceans (GEOTRACES) \n\n\n\nConveners: Tim Conway\, Mariko Hatta\, Nick Hawco \n\n\n\nKeynote: Brandy TonerInvited Speakers: Jun Nishioka\, Sam Wilson \n\n\n\nTrace elements and their isotopes (TEIs) play critical roles in ocean biogeochemistry and carbon cycling\, as well as providing new insights into oceanic processes such as circulation\, ventilation\, particle scavenging\, primary productivity\, redox state and source/sink processes. In the last decade\, the International GEOTRACES Program has facilitated rapid progress in this area\, providing a wealth of data\, answers and new questions for our understanding of past and present ocean TEI cycling. In this session\, we aim to bring together studies from a range of disciplines\, over a range of scales\, that aim to address current questions in marine biogeochemical cycling. We invite submissions concerning any aspects of trace element chemistry and biogeochemistry in the oceans\, and encourage submissions presenting process studies or making use of large-scale concentration distributions or modeling of TEIs or their isotopes to provide new insights. Given the Hawaiian location of Goldschmidt in 2020\, and the recent sharp focus on the importance of East Pacific Rise and Loihi as TEI sources\, we especially encourage submissions dealing with the biogeochemistry of both near and far-field hydrothermal activity. We also encourage studies which focus on rates\, abiotic/biotic particle scavenging\, trace-metal speciation\, redox and isotope cycling\, organic ligand metal interactions\, and boundary exchange (redox\, atmosphere\, sediments\, hydrothermal\, rivers)\, or those that aim to use trace element isotope systems (e.g. Ba\, Si\, Zn\, Cd\, Cr\, Ni) as redox or productivity paleoproxies.
URL:https://www.geotraces.org/event/goldschmidt-2020/
LOCATION:Virtual Meeting\, VA
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200216
DTEND;VALUE=DATE:20200222
DTSTAMP:20260424T103128
CREATED:20191010T081347Z
LAST-MODIFIED:20210726T112538Z
UID:3277-1581811200-1582329599@www.geotraces.org
SUMMARY:2020 Ocean Sciences Meeting 
DESCRIPTION:2020 Ocean Sciences Meeting Dates: 16-21 February 2020Location: San Diego\, California\, USA. \n\n\n\nFor more information: https://www2.agu.org/ocean-sciences-meeting \n\n\n\nGEOTRACES and GEOTRACES related sessions: \n\n\n\nRevealing Biogeochemical Processes on Basin Scales through Ocean TransectsSession ID#: CT008https://agu.confex.com/agu/osm20/prelim.cgi/Session/84582 \n\n\n\nBiogeochemical processes that affect the cycling of trace elements and their isotopes\, as well as carbon\, macronutrients and other constituents\, are studied using two basic field strategies: sampling at a fixed station or regime to measure rates and examine specific processes\, or transects on up to basin scales. Each has its strengths and weaknesses\, but transects can gather a broad sweep of information on a relatively short time scale that can then be used to develop a more specific process-oriented approach. Indeed\, the GEOSECS program of the 1970’s used the transect approach\, and currently the GO-SHIP/Repeat Hydrography and international GEOTRACES programs feature long ocean transects. This session will highlight biogeochemical processes revealed on basin transects that affect trace constituents such as trace elements and isotopes\, as well as organic constituents\, including carbon and macronutrients. It will also focus on sampling and data analysis methods applied to sampling across basins\, and biogeochemical modeling studies that integrate data from long transects into their analyses. \n\n\n\nPrimary Chair: Gregory A Cutter\, Old Dominion University. \n\n\n\nCo-chairs: Phoebe J Lam\, University of California Santa Cruz;  Karen L Casciotti\, Stanford University; Rob Middag\, Royal Netherlands Institute for Sea Research. \n\n\n\nLinking the biology\, geochemistry\, and circulation of the Gulf of MexicoSession ID#: OB015https://agu.confex.com/agu/osm20/prelim.cgi/Session/84432 \n\n\n\nSession Description: \n\n\n\nThe Gulf of Mexico is a small\, dynamic marginal sea that supports a broad range of oceanographic environments\, including eutrophic coastal systems\, oligotrophic open ocean waters\, hydrocarbon-impacted waters and sediments\, and shelf waters that are susceptible to frequent harmful algal blooms. Large atmospheric\, riverine\, and submarine groundwater fluxes strongly influence the biogeochemistry of near-shore and open ocean waters\, yielding a high degree of spatial and temporal variability. Several recent studies have focused on characterizing the biogeochemistry of the Gulf of Mexico using a range of interdisciplinary approaches. Following on a successful 2018 OSM Town Hall led by GEOTRACES and OCB\, this session will bring together interested investigators to highlight new results from the Gulf and identify potential areas of common interest and collaborative opportunities to help inform future planning in GEOTRACES\, OCB\, and other relevant programs. We invite contributions that characterize the variability in the biology\, geochemistry\, and/or physical oceanography of the Gulf of Mexico\, and especially the linkages between them. Suggested contributions may include\, but are not limited to descriptions of water column and benthic geochemical distributions\, biogeochemical rate measurements\, characterizations of molecular ecology\, geochemical fluxes\, and descriptions of circulation that impact Gulf biogeochemical dynamics. \n\n\n\nPrimary Chair: Angela N Knapp\, Florida State University. \n\n\n\nCo-chairs: Alan M Shiller\, University of Southern Mississippi; Heather M Benway\, Woods Hole Oceanographic Inst.; Juan Carlos Herguera\, Center for Scientific Research and Higher Education at Ensenada. \n\n\n\nControls on trace metal biogeochemistry and physicochemical speciation in seawaterSession ID#: CT004https://agu.confex.com/agu/osm20/prelim.cgi/Session/85790 \n\n\n\nSession Description: \n\n\n\nTrace metals function as essential micronutrients and pollutants in the ocean. Organic complexation\, size partitioning\, and redox changes of trace elements can be mediated by biological processes including uptake\, regeneration\, cell lysis\, and organic ligand production. Additional processes influencing the production\, degradation\, and composition of organic matter also play an important role in controlling trace metal distributions\, and both vary across environments (e.g. estuaries\, open ocean\, air-sea-sediment interfaces\, hydrothermal systems). In turn\, resulting changes in bioavailability and cycling of trace elements governs the function and composition of marine phytoplankton communities. Recent efforts\, particularly within GEOTRACES\, have expanded the database of trace metal concentrations and physicochemical speciation. This session seeks to link our understanding of biology\, organic matter\, and trace metal chemistry from molecular to basin-wide scales\, from studies related to biologically-mediated transformations of trace elements to the wider processes controlling metal distributions\, size partitioning\, and fluxes. We welcome submissions highlighting how marine organisms influence the physicochemical speciation of trace elements in seawater\, and how changes in trace element chemistry impact the structure and function of marine ecosystems. In addition to observational\, experimental and modelling studies\, we also invite contributions on the production\, degradation\, and characterization of metal-binding compounds and colloids. \n\n\n\nPrimary Chair: Hannah Whitby\, IUEM Institut Universitaire Européen de la Mer. \n\n\n\nCo-chairs: Randelle M Bundy\, University of Washington; Jessica N Fitzsimmons\, Texas A & M University College Station; Andrea Koschinsky\, Jacobs University Bremen. \n\n\n\nBiogeochemical cycles in oxygen minimum zones: mechanisms\, drivers\, and changeSession ID#: CT001https://agu.confex.com/agu/osm20/prelim.cgi/Session/85226 \n\n\n\nSession Description: \n\n\n\nOxygen minimum zones in the coastal and open ocean are spatially expanding and intensifying\, with model projections showing continued O2 loss in the future. These regions play a fundamental role in the biogeochemical cycles of elements such as carbon\, nitrogen and sulfur as well as trace elements\, host microbial communities with diverse metabolic pathways\, and act as significant sources and sinks of nutrients and climatically relevant (greenhouse) gases. Yet\, significant questions on the nature\, drivers and variability of these processes remain. This session aims to build a comprehensive view of oxygen minimum zone biogeochemistry\, by inviting researchers who apply a variety of approaches to these problems\, from field and laboratory measurements\, to -omics based studies\, to observational synthesis and numerical models. Specifically\, we invite submissions investigating: (1) the distribution\, speciation and transformation of macronutrients (N\, P\, Si)\, trace metals (e.g. Mn\, Fe\, Co\, Ni\, Cu\, Zn\, Cd)\, redox-active elements (e.g. S\, Cr\, Mo\, I) and their isotopes; (2) microbial interactions and their impacts on biogeochemical cycles; (3) processes occurring in and around particle-associated microenvironments\, and (4) the physical drivers and variability of these processes. Studies assessing regional or global impacts with large/new datasets\, e.g. from international programs such as GEOTRACES\, and integrative approaches combining modeling\, field/laboratory measurements\, and/or microbial and molecular approaches are especially encouraged. \n\n\n\nPrimary Chair: David Janssen\, University of Bern. \n\n\n\nCo-chairs: Daniele Bianchi\, University of California Los Angeles; Thomas S Weber\, University of Rochester. \n\n\n\nCT003 – Chemical Speciation and Biogeochemistry in a Changing OceanSession ID#: CT003https://agu.confex.com/agu/osm20/prelim.cgi/Session/85778 \n\n\n\nSession Description: \n\n\n\nHow is seawater chemistry responding to global change processes\, and what are the consequences for marine ecosystems? How do advances in our understanding of chemical speciation give new mechanistic insight into biogeochemical processes? The thermodynamics of solution chemistry in addition to the distribution of trace metals and organic complexes along a gradient of particle sizes and ephemeral clusters are the focus of our session. Although solution thermodynamics is a relatively mature field\, there is an upsurge of research on both measurement and modelling of chemical speciation and an increasing focus on the assessment of uncertainties. This session will also explore interactions between solid and soluble species\, focusing on how recent developments examining the continuum between solid and dissolved (colloids\, nanoparticles\, etc.) alter our paradigm view of element cycling. The transport and reactivity of these ‘in-between’ species may differ from their fully dissolved or solid counterparts\, yet they are the most difficult to sample and observe. We invite submissions pertaining to the measurement and modelling of chemical speciation; assessment of modelling uncertainties; abiotic and biotic transformations from the solid to soluble phase and back again; reactions at the solid-solution interface; trace metal binding environments; sediment-seawater relationships; and interpretation of paleo records. \n\n\n\nPrimary Chair: David R Turner\, University of Gothenburg. \n\n\n\nCo-chairs: Veronique Oldham\, University of Delaware; Sylvia Sander\, IAEA; Emily R Estes\, WHOI. \n\n\n\nAutonomous observing systems for macronutrients and bioactive trace metals in coastal and open ocean settings: present status\, challenges and emerging technologiesSession ID#: IS003https://agu.confex.com/agu/osm20/prelim.cgi/Session/84800 \n\n\n\nSession Description: \n\n\n\nProgress and discovery in the understanding and modeling of biological productivity and species composition in the marine environment is limited by our ability to make macronutrient and bioactive trace metal measurements at relevant spatial and temporal scales. While significant progress has been made with the advent of UV and microfluidic nitrate sensors\, there are still few analytical systems for other important macronutrient species (P\, Si\, NH3) and virtually none for bioactive trace metals that can be deployed on the expanding array of platforms dedicated to long term unattended data gathering (i.e.\, moorings\, gliders\, profilers)\, particularly in oligotrophic surface ocean settings. \n\n\n\nThis session aims to: (1) highlight the latest developments in macronutrient and bioactive trace metal analytical methodologies with strong potential or demonstrated capabilities for unattended operation in coastal and open ocean settings and\, (2) serve as a forum to nurture collaborations among sensor developers and oceanographers with an engineering and analytical chemistry inclination. Contributions from all stages of development are encouraged including: remote samplers\, passive samplers\, reagent-based microfluidic analyzers including the use of novel chemical probes\, electrochemical methods\, optical sensors\, as well as the optimization\, calibration\, and field validation of emerging in situ technologies. \n\n\n\nPrimary Chair: Maxime Grand\, Moss Landing Marine Laboratories. \n\n\n\nCo-chairs: Andrew R Bowie\, University of Tasmania; Agathe Laes-Huon\, IFREMER; Alexander Beaton\, National Oceanography Center\, Soton. \n\n\n\nTowards BioGeoSCAPES: Exploring molecular drivers of ocean metabolism and biogeochemistrySession ID#: OB030https://agu.confex.com/agu/osm20/prelim.cgi/Session/84717 \n\n\n\nBioGeoSCAPES has been proposed as an idea for a new international coordinated research program to integrate knowledge on organism identity and physiology within frameworks of community ecology and global ocean biogeochemistry. It is envisioned that an improved\, predictive\, and quantitative understanding of ocean metabolism can be developed by combining detailed information on cell status\, biochemical processes\, and species interactions with intercalibrated measurements of nutrient fluxes and concentrations. We invite contributions describing research that can serve as inspiration for this nascent program. Appropriate abstracts could include: studies that integrate molecular and biogeochemical measurements\, including fluxes; research that places ‘omics observations (e.g.\, genomic\, transcriptomic\, proteomic\, metabolomic\, metallomic\, lipidomic\, etc.) within quantitative numerical modeling frameworks; or studies that scale from the cellular to the ecosystem level through integrated field measurements or mechanistic models of interactions. The aim of this session is to highlight research that combines informatics\, modeling\, and biogeochemical measurements across scales of time and space\, to test\, integrate\, connect\, and expand upon studies of ocean ecology and metabolism. \n\n\n\nPrimary Chair: Benjamin S Twining\, Bigelow Lab for Ocean Sciences. \n\n\n\nCo-chairs: Erin Marie Bertrand\, Dalhousie University; Martha Gledhill\, GEOMAR Helmholtz Centre for Ocean Research; Naomi Marcil Levine\, University of Southern California. \n\n\n\nThe role of micronutrient cycles in global-scale dynamicsSession ID#: CT010https://agu.confex.com/agu/osm20/prelim.cgi/Session/85400 \n\n\n\nSession Description: \n\n\n\nVia their fundamental control on ocean productivity and the biological carbon pump\, the cycling of nutrients plays an integral role in the dynamics of atmospheric CO2 and climate. In contrast to the ‘big three’- nitrogen\, phosphorus and silicon\, with their well characterised modern distributions and relatively stable inventories\, micronutrients\, such as iron\, remain relatively poorly observed and have the potential for rapid and profound changes in their inventories and biological availability in response to a host of poorly constrained processes. Micronutrients are currently the ‘wild card’ in both past and future carbon cycle and climate change\, prompting the need for improved understanding of their role in Earth system dynamics. We invite a broad range of submissions to provide insights into the pieces of the puzzle\, addressing boundary inputs and sinks\, exchanges between dissolved and solid phases\, interactions with organic compounds\, and their reciprocal interactions with microbial ecosystems. Submissions may include observations\, data synthesis or models\, and may address ocean nutrient cycling over a range of time-scales\, from past (paleo) through contemporary\, and/or in response to future global change. We particularly encourage new insights into the role of feedbacks and the role micronutrient cycles play in shaping global-scale dynamics. \n\n\n\nPrimary Chair: Andy Ridgwell\, University of California Riverside. \n\n\n\nCo-Chair: Alessandro Tagliabue\, University of Liverpool \n\n\n\nUnderstanding Rare Earth Element (REE) distributions and isotopic ratios and the mechanisms behind their use as tracers of (paleo)oceanic processesSession ID#: CT011https://agu.confex.com/agu/osm20/prelim.cgi/Session/84457 \n\n\n\nAnalytical advances have enabled a significant increase of environmental REE abundance and isotopic (e.g. Nd\, Ce) data. These elements are increasingly recognized as promising tracers for elucidating past and present natural and man-made processes in a variety of aquatic environments. However\, in spite of this growth in observations\, our understanding of the mechanisms\, capabilities and limitations of geochemical proxies based on REE abundances and isotopic ratios remains incomplete. We therefore invite presentations of field\, laboratory\, or modeling studies of REEs and related isotope systems aimed specifically at exploring mechanistic connections between their geochemical behavior and observed distributions in marine and terrestrial waters and sediments. Of particular interest are investigations linking REE abundance distributions to Nd or Ce isotopic ratios; validating the use of REEs as proxies of paleoceanographic processes; and addressing REE fractionation and source-to-sink transport on a global scale and at “geochemical hotspots” like estuaries\, hydrothermal vents\, nepheloid layers etc. Presentations that merely contribute TEI distribution data will be given lower priority. We especially encourage submissions from students and early-career scientists. \n\n\n\nPrimary Chair: Brian A Haley\, Oregon State University \n\n\n\nCo-chairs: Torben Stichel\, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven; Johan Schijf\, University of Maryland Center for Environmental Science; Vanessa Hatje\, Universidade Federal da Bahia.
URL:https://www.geotraces.org/event/2020-ocean-sciences-meeting/
LOCATION:San Diego Convention Center\, San Diego\, CA\, United States
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20190818
DTEND;VALUE=DATE:20190824
DTSTAMP:20260424T103128
CREATED:20190117T095920Z
LAST-MODIFIED:20190117T095920Z
UID:2103-1566086400-1566604799@www.geotraces.org
SUMMARY:Goldschmidt 2019
DESCRIPTION:Goldschmidt 2019Dates: 18 – 23 August 2018Location: Barcelona \nFor further information: https://goldschmidt.info/2019/ \nAbstract submission deadline: 29 March 2019 \nGEOTRACES sessions: \n \n10c: Arctic and sub-Arctic Processes: Understanding Changing Ocean Circulation and Biogeochemistry \nConveners: Núria Casacuberta\, Michael Karcher\, John Smith\, Lauren Kipp\, Christian März\, Robyn Tuerena \nResearch in the context of GEOTRACES and beyond has shown the value of using chemical tracers in seawater for documenting and understanding transient ocean processes. Tracer applications in ocean models have provided significant additional insights into physical oceanography and fostered the improvement of ocean models. Natural and anthropogenic tracers such as radionuclides\, gas tracers\, oxygen isotopes\, DOM\, etc. can facilitate a better understanding of circulation and mixing in high latitude regimes. With a focus on the Arctic Ocean and its adjacent seas we invite contributions dealing with chemical tracers as tools for investigations on the circulation within and exchanges between the Arctic and sub-Arctic Seas\, including the northern Atlantic and Pacific oceans. We encourage contributions on large-scale processes occurring over annual to decadal time scales\, that provide insight into dispersion pathways in the Arctic and sub-Arctic seas and tele-connections between Arctic circulation and the Meridional Overturning Circulation via the Arctic Loop Current. We especially encourage contributions combining modelling with tracer measurements. Questions to be addressed may include: • What can be learned about circulation and modification of water masses in the northern oceans based on tracer observations and modelling? • What are the elements of water mass dispersion that appear to be stable over timescales of years to decades\, and which are changing? • What are the governing physics and bio-geochemistry factors? • What are the most promising new tracers for the Arctic domain? • How can collaboration between observational tracer science and modelling be improved? \n10j: Biogeochemical Cycles of Low Oxygen Zones and their Response to Ocean Deoxygenation  \nConveners: Nicole Bale\, Darci Rush\, Ruifang Xie\, Tim Conway\, Insa Rapp\, Laura Bristow \nKeynote: Caroline Slomp (Utrecht University) \nObservations in the past decades have confirmed steadily declining dissolved oxygen concentrations in the subsurface oceans including coastal systems (coastal hypoxia) and open ocean oxygen minimum zones. Future expansion and spread of oxygen deficient zones in the ocean is predicted as a consequence of climate change\, and will result in major changes to marine biogeochemical cycles. These changes will impact sources and sinks of nitrogen\, phosphorus\, sulfur and redox-sensitive trace metals in the oceans\, with global effects on the biota that utilize these elements. This session seeks to bring together geochemical\, biological and physical scientists working on present and past low-oxygen environments\, in order to gain an integrated view of biogeochemistry in these systems. We thus invite submissions of field\, experimental and modelling studies focusing on major nutrients\, trace elements\, dissolved gases\, microbial ecology\, molecular biomarkers\, productivity and physical drivers in these systems. We encourage submissions focusing on (1) the distribution\, isotopic composition\, and speciation of macro- (e.g.\, N\, P\, S\, Si) and micronutrients (e.g.\, Fe\, Zn\, Cd\, Ni\, Cu) across the entire oxic-anoxic transition both in the modern ocean and the geologic past such as oceanic anoxic events\, (2) assessment of the marine sources and sinks of these elements from low-oxygen environments\, (3) N2O and CH4 production and emissions in low-oxygen systems\, and (4) the impacts of chemical and physical change on productivity and microbial pathways. Regional or global interpretations based on earth system models or large chemical datasets from programs such as GEOTRACES are especially encouraged. \n10k: Trace Metal Cycling and Radioisotope Tracers of Ocean Biogeochemistry (GEOTRACES)  \nConveners: Aridane G. González\, Hannah Whitby\, Amber Annett\, Emilie Le Roy \nThis session will highlight recent advances in marine trace element chemistry and the use of radionuclides as tracers in the marine system. In particular\, we focus on the speciation and ligand-binding reactions of trace metals\, and investigation of both micro- and macro-nutrient cycles and fluxes using natural and anthropogenic radionuclides. The GEOTRACES program\, which aims to map the world’s oceans for trace elements and their isotopes with unprecedented resolution\, has facilitated rapid progress in these research areas. Radioisotopes are becoming increasingly powerful tracers for studying the biogeochemical cycles of carbon\, nutrients\, trace elements and isotopes in the world’s oceans. These tracers can be naturally-occurring or anthropogenic\, with a wide range of half-lives allowing their application to a broad array of processes. Methodological advances and standardization (e.g. through GEOTRACES and RiO5) are contributing to increasing spatial coverage and temporal resolution of data of many marine radioisotopes. In order to understand the processes behind trace metal fluxes and export\, we must also understand the physico-chemical interactions and organic speciation of trace metals\, which play an important role in their biogeochemical cycling. The GEOTRACES effort has vastly increased the database of metal-binding organic ligand distributions\, demonstrating key features and distinct regional trends. However the identification of these ligands\, as well as their effect on the redox reactions and bioavailability of trace metals in natural waters\, are still largely unconfirmed. In this session\, we invite observational\, experimental and modelling contributions on the distribution and characterization of organic ligands in the ocean\, as well as their effect on the redox reactions of metals in seawater. In tandem\, this session brings together studies using radionuclides to investigate aspects of marine biogeochemistry from local to global scale: fluxes and export of particulate material\, sources and sinks of macro- and micro-nutrients\, elemental cycles at ocean margins (e.g. estuaries\, sediments\, hydrothermal vents\, air-sea interface)\, or rates of biological processes (e.g. biological export and remineralisation). Studies presenting advances in methodology\, novel applications of radionuclide tracers\, or using radioisotopes to quantify human impacts on ocean biogeochemistry are also welcome. \n08m: Wally Broecker: A Scientific Celebration of a Life in Geochemistry \nConveners: Sidney Hemming\, Edouard Bard\, Sigurdur Gislason\, Roberta L. Rudnick \nWally Broecker was a towering figure in geochemistry. His research themes that spanned many sub-fields of modern geochemistry\, notably radiocarbon dating (the topic of his Ph.D. thesis)\, chemical oceanography and atmospheric chemistry and their changes through time. He developed methods for dating and tracing processes in the Earth system and applied them to various natural archives such as sediments from the deep-sea and from lakes on land\, fossil corals from tropical islands\, speleothems from caves and varnish deposits from deserts. This allowed him to address myriad research questions\, including testing the orbital theory; determining paleo-hydroclimate in drylands and documenting abrupt climate change that involved coupling between atmosphere and ice-sheets dynamics and the general circulation of the global ocean.Wally became intensely interested in\, and worried about\, the fate of anthropogenic CO2 in the atmosphere\, ocean and biosphere and its consequences such as greenhouse warming and ocean acidification. He was among the first scientists to warn us about the negative aspect of global warming and pleaded for engineering solutions to capture and sequester fossil fuel CO2.Over his long and exceptional career\, Wally always had a powerful and positive influence on a large number of students\, post-docs\, collaborators and fellow scientists working in other institutions on all continents. This session is in honor of Wally’s legacy and in the spirit of his wide-ranging interests and generosity. \nIncludes the GEOTRACES talk: \nGEOTRACES: Inspired by GEOSECS to Investigate Trace Elements and their Isotopes in the Ocean Anderson R\, Francois R\, Frank M\, Henderson G\, Jeandel C & Sharma Mhttps://goldschmidt.info/2019/abstracts/abstractView?id=2019002892Wednesday 21 August 2019\, 10h15 \nGEOTRACES-related sessions: \n08f: The Role of Carbon in Regulating Climate States: Lessons from Earth’s Past \nConveners: Kate Littler\, Gerhard Kuhn\, Norbert Frank\, Thomas Chalk\, William Gray \nKeynotes: Jessica Tierney (University of Arizona)\, Robert (Bob) Anderson (LDEO – Columbia Univ.) \nThis session aims to bring together scientists from the proxy and model communities that study all aspects of past cold and warm states of the Earth’s climate system. We welcome model or proxy studies of biogeochemical cycles and climate change that bring new evidence to light of the concentration and movement of carbon between atmosphere\, biosphere\, oceans\, and sediments and its role in regulating the climate states. This is because Earth’s climate is strongly forced by the concentration of CO2 in the atmosphere on a number of different timescales and climate models rely on accurate information from carbon reservoirs to reconstruct our past and predict our future climate states. Therefore\, this session aims to gather work on reconstructing CO2 and/or its movements between reservoirs to narrow down on the primary mechanisms of climate change on geological timescales\, as well as divining our near future through past evidence of glacial CO2 changes\, long-term CO2 drawdown and release\, and major climate transitions. Submissions interrogating the nature of orbital scale climate variability from any period are strongly encouraged as well as those looking at modern processes of carbon regulation and uptake. \n10a: Silicate Alteration in Ocean Sediments and Synthetic Glasses: Process\, Consequence\, and Kinetics \nConveners: Wei-Li Hong\, Jianghui Du\, Isabelle Muller\, David A McKeown \nKeynote: Catherine Jeandel \nReverse weathering and alteration of silicate mineral-glass under low temperature is of fundamental importance in the source and sink of various elements\, planetary climate\, carbon cycling\, and considerations for long-term nuclear waste glass storage. Silicate glass stability is of concern to many scientific studies: basaltic glasses in geochemical systems\, nuclear waste glasses in their final repository\, and weathering of industrial or cultural heritage glass objects. These processes have been studied through field observations as well as by laboratory experiments. For example\, reverse weathering is known to acidify solution through the neo-formation of clay minerals\, which constitutes significant sinks for trace elements and alkalinity in the ocean and sediments. Weathering of marine silicate minerals\, on the other hand\, has been shown to buffer solution pH and promote the precipitation of authigenic carbonates by increasing alkalinity and the release of cations. The interaction of silicate glass and water has been investigated by laboratory leach tests that range from days to over 30 years. These leach studies have identified smectites concomitant with long-term glass stability at low leach rates\, as well as the common occurrence of rapid acceleration of glass alteration associated with zeolite formation at high temperatures or high ratios of glass surface area to leachant volume. Outstanding issues concerning silicate alteration that will be addressed in this session include: the impact on benthic fluxes of various elements in the ocean; the effect on the global elemental cycle and planetary climate; how the strength of these processes vary with time and space; the factors governing the formation of aluminosilicate minerals (such as zeolites and smectites)\, the associated kinetics during glass alteration and its modeling. The two keynote speakers will share their insights on how submarine weathering of lithogenic material affects benthic fluxes of macro- & micro-nutrients (Dr. Catherine Jeandel from LEGOS)\, and macroscopic to atomic scale silicate glass alteration (Dr. Stéphane Gin from CEA). \n  \n10h: The Oceanic Particle Flux and its Cycling within the Deep Water Column \nConveners: Maureen Conte\, Rut Pedrosa Pamies\, Phoebe Lam\, Henry Ruhl \nThe oceanic particle flux plays a major role in global elemental cycles\, the ocean uptake of carbon dioxide\, and the transfer of energy and matter to the deep ocean and sediments. The particle flux and its composition represent a dynamic balance between biological processes that generate large sinking particles in the upper ocean and particle cycling processes within the ocean interior that consume\, modify and produce new sinking particles\, including biologically-driven organic matter remineralization\, particle aggregation/disaggregation\, chemical scavenging\, and authigenic mineral precipitation. New observational platforms\, sampling methods and advances in chemical and molecular techniques (e.g.\, metabolomics\, metagenomics\, transcriptomics) allowing for expanded particle characterization are providing novel insights on particle flux transformations within the deep water column\, including the depth evolution of particle-associated microbial communities and the scavenging of dissolved and suspended materials associated with biological reprocessing of flux materials. Synthesis and modeling studies are providing increased understanding of linkages between ecosystem structure and global patterns in surface export and flux transfer efficiency to the deep ocean. This multidisciplinary session will bring together scientists under research themes related to geochemistry\, biology\, oceanography\, modeling and climatology to present the current status of our understanding of processes controlling the magnitude and composition of the oceanic particle flux\, its attenuation and transformation with depth\, and its coupling with associated biogeochemical cycles. Session presentations will describe novel findings and syntheses which\, in turn\, will highlight key knowledge gaps in the particle flux and its role in geochemical cycles. \n  \n12a: Hydrobiogeochemical Processes at the Sediment-Water Interface: Wetlands\, River Corridors and Coastal Zones \nConveners: Dipankar Dwivedi\, Xingyuan Chen\, Joseph Tamborski\, Valentí Rodellas\, Edward O’Loughlin\, Yamin Deng\, Virginie Sanial \nKeynote: Christof Meile (University of Georgia) \nTerrestrial-aquatic and surface-groundwater interfaces are transitional zones that play a vital role in controlling the exchange of water and chemical constituents between land and water systems. In terrestrial-aquatic interfaces (e.g.\, wetlands and lagoons) the movement of water and the biogeochemically catalyzed transformations of its constituents determine the mobility of nutrients and contaminants\, the emission of greenhouse gasses into the atmosphere\, carbon (C) cycling and sequestration in subsurface environments\, and the quality of water itself. Likewise\, groundwater-surface water interactions (e.g. hyporheic and porewater exchange\, terrestrial and submarine groundwater discharge) have long been recognized as an important component of the hydrological cycle and an essential pathway for the transfer of material (e.g. nutrients\, metals\, C\, and contaminants) to surface water bodies (e.g. coastal ocean\, streams\, lakes\, lagoons\, and wetlands). This session brings together studies focusing on hydrobiogeochemical exchanges occurring at terrestrial-aquatic and surface-groundwater interfaces\, and their impacts on freshwater and marine systems. We particularly welcome new contributions addressing i) geomorphological and hydrobiogeochemical processes (including redox dynamics and transformations of C\, nutrients\, metals\, and contaminants) occurring in wetland environments (sediments\, rhizosphere\, and water)\, coastal aquifers\, submarine groundwater discharge zones\, and hyporheic zones; ii) modeling of ecosystem processes; iii) the challenges of bridging across scales (e.g.\, molecular to landscape; regional to global-scale). Method-based contributions which address iv) omics and bioinformatics approaches for identifying microbial interactions\, and v) new methodologies and the combination of approaches to trace groundwater-surface water interactions and associated forcing mechanisms\, are also welcomed. \n  \n13f: Trace Elements Speciation: Novel Methodologies and Insights into Transformations Influencing their Global Biogeochemical Cycle \nConveners: Sylvain Bouchet\, Adrien Mestrot \nMany trace elements (TE) can be toxic (e.g.\, As\, Hg\, Sb) and/or essential (e.g.\, Cu\, I\, Se) for humans\, plants and wildlife. Some also play important roles in atmospheric processes\, e.g.\, S\, I and Br. To understand the biogeochemical cycle and effects of TE\, it is crucial not only to quantify them in environmental and biological compartments\, but also to determine their speciation. This entails the distribution of TE between specific chemical forms in term of electronic or oxidation state\, molecular structure or complexes formed with various ligands. Indeed\, the partitioning\, transport\, bioavailability\, bioaccumulation and toxic or beneficial effects of TE largely depend on their speciation. The goal of this session is to highlight recent advances (1) in methodologies\, using elemental\, molecular and/or spectroscopic techniques\, allowing the identification and/or quantification of TE species (2) in our mechanistic understanding of the biotic and/or abiotic transformations affecting TE species (e.g.\, alkylation/dealkylation\, oxidation/reduction\, colloid formation and sorption/desorption) and (3) in assessing fluxes of TE among aquatic\, terrestrial and atmospheric (eco)systems. Contributions to the session may include fundamental and applied research based on laboratory work\, field experiments and/or modeling approaches. Studies looking at the potential effects of on-going and future global changes\, such as climate change and eutrophication\, on the fate of TE and their species are also strongly encouraged. \n  \n13e: Radionuclides in the Environment: Modeling\, Experimental\, Scaling\, Controlling Chemical/Microbial/Hydrological Processes \nConveners: Peter H. Santschi\, Daniel Kaplan \nSince the onset of the Manhattan project\, fluxes of anthropogenic radionuclides through the environment increased. This has resulted in increased concentrations of a number of anthropogenic radionuclides in the various environmental reservoirs. Consequently\, there is a growing need to understand and predict the consequences of increased fluxes of anthropogenic radionuclide\, in relation to those of natural radionuclides. At the same time\, the input of both anthropogenic and natural radionuclides can provide us\, due to their radioactive decay\, with the ability to get insights into time and spatial scales of key chemical/microbial/hydrological processes. The objective of this session is increased understanding of biogeochemical processes that control radionuclide cycling and their consequences in natural and anthropogenic systems. The emphasis is on modeling\, experimental\, scaling\, controlling chemical/microbial/hydrological processes. Themes can include: 1) Radionuclide speciation in aquatic\, terrestrial and atmospheric compartments\, including particulate and colloidal phases\, and the role biological processes play in determining radionuclide mobility\, oxidation state and degree of organic complexation/chelation. 2) Radionuclides in environments that provide sinks of radionuclides in the geosphere\, including wetlands\, lake sediments and soils. 3) Controlling chemical/microbial/hydrological processes\, including dissolution from primary mineral or organic phases\, sorption and incorporation into secondary phases. \n  \n 
URL:https://www.geotraces.org/event/goldschmidt-2019/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20190708T080000
DTEND;TZID=Europe/Paris:20190718T170000
DTSTAMP:20260424T103128
CREATED:20190123T083828Z
LAST-MODIFIED:20190123T083828Z
UID:2107-1562572800-1563469200@www.geotraces.org
SUMMARY:27th IUGG General Assembly
DESCRIPTION:27th IUGG General Assembly Dates: 8-18 July\, 2019Location: Palais des Congrès in Montréal\, Québec\, Canada \nThe 27th International Union of Geodesy and Geophysics (IUGG) General Assembly will be held July 8-18\, 2019 at the Palais des Congrès in Montréal\, Québec\, Canada. This is a special opportunity for participants from Canada and from around the world to come together and share their science and culture. 2019 marks the 100th anniversary of IUGG; we will look back on the accomplishments of the previous century of Earth and space science research\, and forward to the next century of scientific advancement. Join us for a host of scientific activities\, including special public lectures\, keynote Union lectures and a wide variety of themed sessions. \nIAPSO is sponsoring or co-sponsoring 31 symposia covering a wide range of topics\, including several two linking to biogeochemistry (see below) but also subjects such as marine plastics and ocean acidification. \nThe program details can be found at the Assembly’s website: http://www.iugg2019montreal.com/iugg-program.html. Deadline for abstract submission in February 18th 2019. \nGEOTRACES relevant sessions: \n \nP02 – PHYSICS AND BIOGEOCHEMISTRY OF SEMI-ENCLOSED\, SHELF SEAS\, AND COASTAL ZONES \nConvener: Peter Zavialov (Russia) \nCo-Conveners: Jianping Gan (China)\, Osmar Moller Jr (Brazil)\, Katrin Schroeder (Italy) \nDescription \nThis interdisciplinary symposium provides a joint forum for oceanographers whose research focuses on physical\, chemical\, and biological processes in coastal zones\, semi-enclosed and shelf seas of the World\, as well as their responses to climate change and anthropogenic impacts. These areas are often characterized by complex interactions between land\, ocean\, and atmosphere\, they exhibit rich dynamics driven by a variety of feedbacks and forcing mechanisms. Marginal seas and coastal areas are particularly vulnerable to climate change effects and anthropogenic stressors. Given their limited geographical extension and their sometimes constricted connection to the open ocean\, these environments often exhibit shorter timescales in their responses to external forcing: this is why they are widely recognized as natural “laboratories” for studying oceanic processes and interactions between the physical\, biogeochemical and climatic spheres. They also play an exceptionally important role in ecosystem services and socio-economic issues and require careful governance measures to avoid or mitigate environmental deterioration. \nGathering experts from different regions\, the symposium will give a global perspective of the topic through comparison and elucidation of similarities and differences. Contributions on different regions are invited\, related to themes such as innovative observational\, theoretical\, experimental and modeling studies of the hydrodynamics\, marine biogeochemistry (e.g.\, nutrient dynamics\, primary production\, acidification\, algae blooms) and the influence these regional seas and coastal zones exert on the adjacent basins/oceans and on the global scale. Studies of past\, present and future climate variability are welcome\, as well as interdisciplinary studies on the bio-physical interactions in semi-enclosed and shelf seas. \nP09 – MARINE BIOGEOCHEMISTRY THROUGH TIME: NUTRIENT\, TRACE METAL\, OXYGEN\, AND CARBON CYCLING IN THE PAST\, PRESENT AND FUTURE \nConvener: Kate Hendry (UK) \nCo-Conveners: Zanna Chase (Australia)\, Katja Fennel (Canada)\, Patrick Rafter (USA) \nDescription \nOcean biogeochemistry is undergoing significant changes\, with likely effects on primary production and ecosystem health from massive human perturbations of the global carbon and nitrogen cycles. Future projections are highly uncertain\, but unlocking drivers and effects of biogeochemical reorganizations in Earth’s past may hold clues. \nThe aim of this symposium is to explore recent developments in our understanding of marine biogeochemistry at the interface of different disciplines. Topics could include limitation of primary production by micro-nutrients and macro-nutrients; the role of ecological interactions at the scales of populations\, assemblages and ecosystems; boundary processes including sedimentary cycling\, inputs from rivers\, groundwater\, the cryosphere and atmosphere; and physical movement that influences nutrient distribution and light availability by turbulent mixing\, mesoscale eddies and large-scale ocean circulation. We welcome contributions that offer a broad perspective from a wide range of disciplines\, including studies that utilise and bring together paleoclimate archives\, modern oceanographic observations\, and models.
URL:https://www.geotraces.org/event/27th-iugg-general-assembly/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20190421
DTEND;VALUE=DATE:20190426
DTSTAMP:20260424T103128
CREATED:20190329T133423Z
LAST-MODIFIED:20191010T083223Z
UID:2108-1555804800-1556236799@www.geotraces.org
SUMMARY:SOLAS Open Science Conference
DESCRIPTION:SOLAS Open Science Conference\nDates: 21-25 April 2019\nLocation: Sapporo\, Japan \nFor further information: https://www.confmanager.com/main.cfm?cid=2778 \n\nGEOTRACES Special Session:  \nAtmospheric deposition of iron\, ocean biogeochemistry and marine emission of biological aerosols \nConveners: Akinori Ito (JAMSTEC)\, William M. Landing (Florida State University) and Douglas S. Hamilton (Cornell University) \nAtmospheric deposition of aerosols to the ocean has been suggested to modulate marine primary productivity. Marine organic material has been shown to be an important source of ice-nucleating particles (INP) in high-latitude environments\, and hence impacts the atmospheric energy balance. Significant progress has been made in our understanding of atmospheric inputs of labile iron (Fe) from natural and anthropogenic sources to the surface oceans. However\, there are still large uncertainties regarding the relative importance of different sources of aerosols\, the effects of atmospheric aerosol deposition on bioavailable Fe concentrations in the ocean and on the marine organic material and its role as INP. The discussion in this session focuses on problems and challenges in laboratory experiments and field measurements to improve the representations of trace metal biogeochemistry in atmosphere and ocean models\, in particular\, the two-way movement of aerosol material across the boundary between the atmosphere and ocean.
URL:https://www.geotraces.org/event/solas-open-science-conference-2/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20190223
DTEND;VALUE=DATE:20190303
DTSTAMP:20260424T103128
CREATED:20180921T130603Z
LAST-MODIFIED:20191010T083351Z
UID:2097-1550880000-1551571199@www.geotraces.org
SUMMARY:ASLO 2019\, Aquatic Sciences Meeting
DESCRIPTION:ASLO 2019\, Aquatic Sciences Meeting\nDates: 23 February – 2 March 2019\nLocation: San Juan\, Puerto Rico \nFor further information: https://aslo.org/sanjuan2019/main\n \n\nGEOTRACES sessions: \n\nSS51. New views on the biological transformation of metals in the marine environment \nRandelle Bundy\, University of Washington\nShane Hogle\, Massachusetts Institute of Technology\nKatherine Heal\, University of Washington\nKristen Buck\, University of South Florida\nP. Dreux Chappell\, Old Dominion University \n \nRecent results from the GEOTRACES program and other large-scale oceanographic surveys have provided compelling new insights into the distributions\, chemical speciation\, sources\, and sinks of trace metals. The bio-active trace metals such as iron\, copper\, cobalt\, zinc\, nickel and manganese are particularly compelling because they influence surface ocean primary productivity\, deep ocean carbon storage\, and atmospheric carbon dioxide concentrations in our modern earth system and over geologic timescales. There is still much to learn about the regeneration of bioactive metals from organic matter\, the influences of biological ligand production\, and the impacts of trace metal bioavailability in the ocean. Insights from recent biogeochemical studies have raised new questions related to the biogeochemical processes impacting the distributions of trace metals\, and novel methodological approaches are now revealing the molecular mechanisms that connect major bio-active trace metal cycles to the physiology\, ecology\, and evolution of marine microorganisms. However\, these techniques have only begun to be coupled with the wealth of existing geochemical knowledge afforded by existing large-scale programs. Here we welcome submissions relating to the cycling of bio-active trace metals\, particularly those using innovative techniques and novel modeling approaches. We also welcome studies from across temporal and spatial scales\, as well as experimental and modeling studies that bridge biological and geochemical cycling of trace elements. We hope this session will provide a forum for diverse scientific perspectives on the biogeochemical cycling of trace metals in the ocean. \n 
URL:https://www.geotraces.org/event/aslo-2019-aquatic-sciences-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20190106
DTEND;VALUE=DATE:20190110
DTSTAMP:20260424T103128
CREATED:20180129T085709Z
LAST-MODIFIED:20180129T085709Z
UID:2076-1546732800-1547078399@www.geotraces.org
SUMMARY:Fourth Xiamen Symposium on Marine Environmental Sciences (XMAS-IV)
DESCRIPTION:Fourth Xiamen Symposium on Marine Environmental Sciences (XMAS)Dates: 6-9 January 2019Location: Xiamen\, China \nFor further information: http://mel.xmu.edu.cn/conference/4xmas \n \nThe deadline for abstract submission is Aug 31\, 2018.  \nGEOTRACES session: \nThe role of trace metals in controlling structure and function of microbial communities in contemporary oceans  \nPunyasloke Bhadury\, Yeala Shaked\, Maria Maldonado\, Yihua Cai\, Chris Bowler \nTrace metals are essential for life\, catalyzing key cellular reactions that influence ocean productivity\, biodiversity\, and biogeochemical cycling of the major elements including carbon and nitrogen. Essential trace metals\, such as iron and zinc\, are usually present at very low dissolved concentrations in seawater and are mostly found as stable organic complexes. Indeed\, in large oceanic regions trace metals control the physiology and ecological functioning of microbial communities. There is a need to understand how microbial communities including nano and pico-phytoplankton acquire essential metals and how biological activity is affected by metal availability and resulting consequences for cycling of essential elements such as carbon\, nitrogen and phosphorus. To understand many of these questions\, large international research programs such as GEOTRACES have been initiated incorporating trans-disciplinary approaches to understand mechanistic links between geochemical and biological variability. In this session\, we welcome contributions from researchers\, including early career scientists\, investigating the role of trace metals on the structure and functioning of microbial communities including marine phytoplankton across ecosystems. In particular\, we welcome submissions in areas which address the link between trace metals and isotopes with a focus on microbial communities mediating the cycling of major nutrients in contemporary oceans\, metal uptake and competition between microbes for metal resources and the role of trace metals in shaping cellular function and evolution. \nSession ID: C3 [Bio-GEOTRACES]
URL:https://www.geotraces.org/event/fourth-xiamen-symposium-on-marine-environmental-sciences-xmas-iv/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20180812
DTEND;VALUE=DATE:20180818
DTSTAMP:20260424T103128
CREATED:20171106T151733Z
LAST-MODIFIED:20171106T151733Z
UID:2063-1534032000-1534550399@www.geotraces.org
SUMMARY:Goldschmidt 2018
DESCRIPTION:Goldschmidt 2018Dates: 12 – 17 August 2018Location: Boston\, USA \nFor further information: https://goldschmidt.info/2018/index \nAbstract submission deadline: 30 March 2018 \nGEOTRACES session: \n \nSession 07i: New Insights in Marine Trace Element Biogeochemistry \nConveners: Christian Schlosser\, Florian Scholz\, Rene Boiteau\, Tim Conway\, Daniel Ohnemus\, Jennifer McKay\, William Homoky and Jessica Fitzsimmons. \nThe cycling of trace elements in the ocean is strongly influenced by a combination of biotic and abiotic processes including biological utilization\, water mass circulation\, sources and sinks\, and interactions with particles. Many trace elements are essential for life\, while others may be toxic pollutants. Therefore\, understanding the factors that control the distribution\, reactivity\, and bioavailability of these elements is important for predicting their effect on ecosystems and climate\, and for using them as tracers of ocean processes. Recent advances in oceanography have begun to clarify the unique sources and chemical forms of these elements throughout the ocean. Examples include better constraints on the cycling and sources of dissolved elements by isotopic analyses\, improved parametrization of benthic metal processes and fluxes in biogeochemical models\, revelation of particulate and colloidal metal phases by size-partitioned analyses\, and elucidation of siderophore\, humic\, and mineral forms of metals using novel applications of electrochemical\, mass spectrometric\, and x-ray spectroscopic methods. This session solicits submissions highlighting new findings about the processes that influence the marine biogeochemistry of marine trace elements and their isotopes in the past and present. We invite contributions that focus on the study of elemental isotope fractionation\, biological uptake and remineralization\, exchange processes at the sediment-bottom water and hydrothermal interfaces\, metal speciation and redox chemistry\, and biogeochemical modeling. Abstracts concerning new insights on elemental cycling from GEOTRACES ocean sections and process studies on the cycling of trace elements\, and any other works focused on understanding the transformations of metals from the molecular to global scale are strongly encouraged.  \nGEOTRACES-related session: \nSession 07l: Carbon Storage in the Ocean now and over Time \nConveners: Laura Robinson\, Gideon Henderson\, Christopher Hayes\, Barbel Honisch and Joe Stewart. \nKeynote speaker: Richard Zeebe (University of Hawaii) \nThis session invites contributions that relate to mechanisms through which the oceans cycle and store carbon. We welcome studies that consider the natural system’s capacity to store carbon today and over geologic timescales\, the rates of carbon cycle processes\, and the biogeochemical pathways involved in the carbon cycle. We also welcome efforts to examine modern day geoengineering of the ocean’s biogeochemical systems. \n  \nSession 07m: Sedimentary biogeochemical cycling along continental margins: role of climate\, tectonic setting\, and oceanographic regimes \nConveners:  Sian Henley\, Johan Faust\, Silke Severmann\, Robert Aller \nContinental margins are regions of intense diagenetic cycling\, sediment-water fluxes\, and burial of biogenic and lithogenic debris.  Margins are generally characterized by high biological productivity and sediment accumulation rates. However\, specific modes of benthic elemental cycling\, authigenic mineral formation\, and storage are strong functions of depositional environment\, including physical dynamics and sediment sources.  The effects of climate change\, such as decreasing sea-ice in the higher latitudes or changing precipitation patterns in drainage basins\, have the potential to greatly alter benthic cycling and the exchange between sediments and the water column.   This session will explore and contrast benthic biogeochemical cycling along continental margins from a range of climatic and weathering regimes (e.g.\, drainage basin weathering\, Corg reactivity)\, tectonic setting (active\, passive margins)\, sediment types (permeable\, impermeable)\, coastal processes (deltaic\, non-deltaic)\, and oceanographic conditions (e.g.\, upwelling\, ice cover\, ventilation – oxygenation\, tidal range). We particularly welcome contributions that focus on the origin\, processing\, fate\, and characterization of organic and inorganic carbon\, nutrients and metals within the context of modern climate\, oceanographic and ecosystem change.
URL:https://www.geotraces.org/event/goldschmidt-2018/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20180610
DTEND;VALUE=DATE:20180616
DTSTAMP:20260424T103128
CREATED:20180118T145424Z
LAST-MODIFIED:20180118T145424Z
UID:2075-1528588800-1529107199@www.geotraces.org
SUMMARY:ASLO 2018 Summer Meeting
DESCRIPTION:Association for the Sciences of Limnology and Oceanography (ASLO) 2018 Summer Meeting Dates: 10 -15 June 2018Location: Victoria\, BC\, Canada \nFurther information: https://aslo.org/victoria2018/main \nGEOTRACES-related sessions: \nSS82: EMERGING MODELS OF TRACE METAL BIOAVAILABILITY TO AQUATIC ORGANISMS \nDavid Semeniuk\, Minnow Environmental Inc. (dsemeniuk@minnow.ca)Randelle Bundy\, University of Washington (rbundy@uw.edu)Anne Cremazy\, U. British Columbia (acremazy@zoology.ubc.ca) \nWell established equilibrium-based trace metal bioavailability models for aquatic organisms (e.g.\, the Free Ion Activity Model and Biotic Ligand Model) have proven useful for predicting the bioavailability and toxicity of metals in aqueous environments for a variety of organisms\, from phytoplankton to fish. These models propose that metal bioavailability is proportional to the concentration of the free metal ion in solution. Thus\, given enough information about the chemical environment\, one can predict metal bioavailability and potential toxicity. Yet\, emerging laboratory and field studies indicate that these models do not accurately predict metal bioavailability under all environmentally realistic conditions\, such as when salinity and pH varies\, when natural organic ligands and bioavailable metabolites are present\, and at low trace metal concentrations (as opposed to high concentrations typical of industrial effluents). In light of this\, this session seeks new work that explores modified or alternative models for trace metal bioavailability to aquatic organisms\, and their ecological implications. We invite research concerning both experimental and biophysical chemical modeling of trace metal bioavailability\, including the roles of chemical speciation\, kinetic controls on metal bioavailability\, and the influence of metal and organic ligand mixtures on metal speciation\, bioavailability and toxicity.
URL:https://www.geotraces.org/event/aslo-2018-summer-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20180211
DTEND;VALUE=DATE:20180217
DTSTAMP:20260424T103128
CREATED:20160415T123518Z
LAST-MODIFIED:20160415T123518Z
UID:2015-1518307200-1518825599@www.geotraces.org
SUMMARY:2018 Ocean Sciences Meeting
DESCRIPTION:2018 Ocean Sciences Meeting Dates: 11-16 February 2018Location: Portland\, Oregon\, USA. \nFor more information: http://osm.agu.org/2018/# \nGEOTRACES and GEOTRACES related Town Halls: \nRelease of new GEOTRACES Data ProductWednesday\, February 14\, 2018\, 12:45 PM – 01:45 PMOregon Convention Center – Oregon Ballroom 201 Room has changed! \nGEOTRACES\, an international study of the marine biogeochemical cycles of trace elements and their isotopes\, has released its second data product (IDP2017).  The new data product expands greatly on the first collection of results released in 2014 in two important ways: 1) by adding a substantial body data from new cruises and 2) by adding additional datasets not available in the 2014 data product from cruises across the five world Oceans (e.g. aerosols\, isotopes and biological parameters that support the emerging BioGEOTRACES initiative). This expanded set of parameters available in the IDP2017\, ranging across micronutrients\, contaminants\, radioactive and stable isotopes and a broad suite of hydrographic parameters used to trace water masses provides an unprecedented means to understand the role of trace elements in shaping the functioning of the Ocean system.  We invite everyone to this town hall to learn about accessing IDP2017 and how it can be used for interdisciplinary research and teaching applications: http://www.bodc.ac.uk/geotraces/data/idp2017/ \nOrganizers: Robert F Anderson\, Columbia University of New York; Alessandro Tagliabue\, University of Liverpool; Gregory A Cutter\, Old Dominion University and Maite Maldonado\, University of British Columbia. \nDeveloping a framework for trace element\, isotope\, and other biogeochemical research in the Gulf of Mexico and Caribbean SeaTuesday\, February 13\, 2018\, 12:45 PM – 01:45 PMOregon Convention Center – Oregon Ballroom 201 Room has changed! \nIn addition to their dynamical influence on the formation of the Gulf Stream\, the Gulf of Mexico and Caribbean Sea are strongly affected by continental margin processes such as major river inputs and significant submarine groundwater discharges. GEOTRACES studies have increasingly demonstrated the importance of ocean margins in affecting trace element and isotope (TEI) fluxes to the open ocean. Given the importance of these marginal fluxes for cycling of carbon and nutrients\, the Gulf of Mexico has been a regional focus for recent OCB activities. However\, these activities\, as well as the 2010 Deepwater Horizon oil spill\, have revealed major gaps in our understanding of how inputs to the shelf influence biogeochemical and biological processes in open waters\, especially with regard to TEIs. Most such Gulf studies have focused on the Louisiana and West Florida shelves\, with little attention to open waters and interactions with the Loop Current. The steering committees of US GEOTRACES and OCB are beginning a conversation devoted to TEI research in the Gulf of Mexico and Caribbean. We invite GEOTRACES\, OCB\, and other ocean scientists interested in these marginal seas to discuss processes of interest\, existing programs and data sets\, and potential steps forward. \nOrganizers: Alan M Shiller\, University of Southern Mississippi; Heather M Benway\, Woods Hole Oceanographic Inst.; Robert F Anderson\, Columbia University & Lamont-Doherty Earth Observatory; Angela N Knapp\, Florida State University; Benjamin S Twining\, Bigelow Lab for Ocean Sciences and Kristen N Buck\, University of South Florida \nUpdate on the Second International Indian Ocean Expedition (IIOE-2)Monday\, February 12\, 2018\, 12:45 PM – 01:45 PMOregon Convention Center – D135-D136 \nThe second International Indian Ocean Expedition (IIOE-2) was launched on December 2015 and it will run through 2020 and beyond. This session will provide an update on international research activities that are being undertaken and planned in IIOE-2 and also report on the outcomes of a recent US Indian Ocean Science Planning workshop. The session will also present the mechanisms for involvement of interested scientists in IIOE-2 activities. \nOrganizers: Raleigh R Hood\, Michael J McPhaden and Lynne D Talley. \nGEOTRACES and GEOTRACES related sessions: \nThe Behavior of Trace Elements and Isotopes in Different Ocean Basins: New Insights from Comparisons and ContrastsSession ID#: 28118 Wednesday\, February 14\, 2018\, 08:00 AM – 10:00 AM\, 02:00 PM – 04:00 PMPosters: Wednesday\, February 14\, 04:00 PM – 06:00 PM \nSession Description: \nRecent international programs such as GEOTRACES have been examining the biogeochemical cycling of trace elements and isotopes (TEIs) in the world’s oceans to reveal the mechanisms and rates affecting their concentrations\, distributions\, chemical forms\, and interactions with organisms. In addition to studies by individual investigators\, the accumulating results show many similarities\, but some surprising differences between ocean basins\, with a classic example being the regionally-specific Cd/PO4 relationships. In the same way that deviations from the Redfield ratio of N/P between ocean basins\, known since the 1970s GEOSECS program\, provide insight into nitrogen cycle processes\, what can we learn from the comparisons and contrasts of TEIs\, and what tools are needed to explore and test these observations? This session seeks presentations from the observational and modeling communities on lessons learned from inter basin TEI data sets with respect to inputs to\, cycling within\, and exports from the world’s oceans. In addition we invite contributions that consider how TEI distributions\, their chemical speciation\, and interactions with micro-organisms shape microbial community structure and productivity in various ocean basins. \nPrimary Chair:  Gregory A Cutter\, Old Dominion University\, Ocean\, Earth and Atmospheric Sciences\, Norfolk\, VA\, United States \nCo-chairs:  Adrian Burd\, University of Georgia\, Athens\, GA\, United States\, Jay Thomas Cullen\, University of Victoria\, Victoria\, BC\, Canada and Tung-Yuan Ho\, Research Center for Environmental Changes Academia Sinica\, Taipei\, Taiwan \nAbiotic and Biotic Retention\, Recycling\, and Remineralization of Metals in the OceanSession ID#: 23502 Monday\, February 12\, 2018\, 04:00 PM – 06:00 PM and Tuesday\, February 13\, 2018\, 08:00 AM – 10:00 AM Posters: Monday\, February 12\, 2018\, 04:00 PM – 06:00 PM \nSession Description: \nTrace metals shape both the biogeochemical functioning and the biological structure of oceanic provinces\, and considerable insight into trace metal distributions have been gleaned from international programs like GEOTRACES. To date\, observational and modelling efforts have mainly focused on modes of external metal supply from different sources. While this has yielded important advances\, we also know that metals undergo key internal transformations such as biotic uptake\, scavenging\, recycling\, and remineralization.  These internal transformations play crucial roles in shaping the biogeochemical cycling of metals by governing their bioavailability\, oceanic distributions\, and residence times. In this session we solicit presentations that address key questions regarding the abiotic and biotic processes regulating (i) the retention timescale for metals in the upper ocean\, (ii) surface ocean metal recycling and bioavailability\, (iii) the subsurface regeneration length scales for metals in the ocean interior\, and (iv) the role of mineral versus organic characteristics of sinking particles on metal scavenging.  We also seek presentations that provide insights into how these key questions are mediated by differing physico-chemical and microbial processes in contrasting ocean settings. Presentations showing insights from the diverse standpoints of biogeochemical oceanography and molecular ecology\, from both observational and modelling perspectives\, are strongly encouraged. \nPrimary Chair:  Philip W Boyd\, University of Tasmania\, Institute for Marine and Antarctic Studies\, Hobart\, Australia \nCo-chairs:  Kristen N Buck\, University of South Florida Tampa\, College of Marine Science\, Tampa\, FL\, United States; University of South Florida\, College of Marine Science\, St. Petersburg\, FL\, United States\, Jessica N Fitzsimmons\, Texas A&M University\, Department of Oceanography\, United States and Alessandro Tagliabue\, University of Liverpool\, Liverpool\, United Kingdom \nThe Dawn of BioGEOTRACES: Metal-Microbe Interactions in the OceanSession ID#: 27768Thursday\, February 15\, 2018\, 08:00 AM – 12:30 AMPosters: Thursday\, February 15\, 2018\, 04:00 PM – 06:00 PM \nSession Description: \nTrace metals are essential for life\, catalysing key cellular reactions which then govern patterns of ocean fertility and biodiversity. Fundamental in this regard are the ways in which ocean microbes acquire essential metals and how biological activity is affected by metal availability. Developments in this field are being led by advances in analytical chemistry\, nanotechnology\, molecular biology\, and bioinformatics\, as well as the expansion of ‘omics’-related observations of in-situ microbial communities\, and the advent of new high resolution geochemical data from the international GEOTRACES program. It is now timely to bring together insights from these different disciplines\, spanning observation and modelling approaches to better understand how microbial activity\, diversity and ecology is shaped by interactions with trace metals over different space and time scales. By linking across disciplines\, there is the potential to develop the mechanistic understanding required to inform the ecological and biogeochemical models we rely on for testing hypotheses and projecting the impacts of ocean change. We are specifically interested in contributions that address (i) metal uptake and competition between microbes for metal resources\, (ii) how microbes adapt their physiology to metal scarcity and varied supply and (iii) how trace metals shape cellular function and evolution. \nPrimary Chair:  Adrian Marchetti\, University of North Carolina\, at Chapel Hill\, Department of Marine Sciences\, Chapel Hill\, NC\, United States \nCo-chairs:  Maria Teresa Maldonado\, University of British Columbia\, Vancouver\, BC\, Canada\, Alessandro Tagliabue\, University of Liverpool\, Liverpool\, United Kingdom and Yeala Shaked\, Hebrew University\, Interuniversity Institute for Marine Sciences\,\, Eilat\, Israel \n  \nBiogeochemical Processes Across Oxic-Anoxic TransitionsSession ID#: 28621Monday\, February 12\, 2018\, 08:00 AM – 10:00 AM\, 10:30 AM – 12:30 PMPosters:  Monday\, February 12\, 2018\, 04:00 PM – 06:00 PM \nSession Description: \nA suite of metabolically and chemically important oxidation-reduction reactions occur through the transitions from oxic to anoxic regions of the ocean. These reactions drive nutrient availability and metal solubility\, as well as organic matter production\, consumption\, and preservation. As oxygen minimum and deficient zones expand\, redox reactions in low to no oxygen environments are becoming globally more important\, both for the nitrogen and carbon cycles and also for trace metals. Understanding such environments can provide an important analogue for ocean chemistry and microbial life in the Precambrian\, prior to the great oxygenation events. This session seeks to bring together geochemical\, biological\, and physical scientists working on low oxygen and anoxic regions\, in order to create an integrated picture of biogeochemistry in these environments. Presentations from observational\, experimental\, or modeling standpoints on nutrients\, trace elements\, dissolved gases\, isotope systematics\, microbiology\, biological productivity\, or physical drivers in these regions are all invited. We especially encourage submissions investigating the redox transition in the water column or sediments of restricted basins such as Saanich Inlet and the Black Sea\, as well as GEOTRACES and open-ocean studies of settings such as the Eastern Tropical Pacific\, North Atlantic\, and Indian OMZs. \nPrimary Chair:  Jeffry V Sorensen\, University of Victoria\, School of Earth and Ocean Sciences\, Victoria\, BC\, Canada \nCo-chairs:  Roberta Claire Hamme\, University of Victoria\, School of Earth and Ocean Sciences\, Victoria\, BC\, Canada and Tim M Conway\, University of South Carolina\, Columbia\, SC\, United States \nOcean Biogeochemistry and Air-Sea InteractionsSession ID#: 29651Thursday\, February 15\, 2018\, 02:00 PM – 04:00 PM and Friday\, February 16\, 2018\, 08:00 AM – 10:00 AMPosters:  Wednesday\, February 14\, 2018\, 04:00 PM – 06:00 PM \nSession Description: \nStudies of ocean biogeochemistry related to air-sea interactions are providing significant new information to help us understand a wide variety of physical\, chemical and biological processes in the oceans. There are many processes that link the surface ocean and the lower atmosphere\, for example\, the release of biogenic compounds as sources of cloud or ice condensation nuclei\, the deposition of natural and anthropogenic aerosols that can affect plankton communities\, the transport of airborne microbes that can alter the dynamics of proximal and distant ecosystems\, the biology\, chemistry and physics of the sea-surface microlayer (SML) as the interface through which all exchanges between the atmosphere and the ocean occur\, the enrichment of surfactants and other biogenic compounds in the SML that can affect gas exchange rates\, etc. Understanding these processes is crucial for improving the reliability of regional and global models and the evaluation of future scenarios. We welcome contributions on all aspects of the physics\, chemistry\, and biology of air-sea interactions\, including observations\, experimentation\, methodological or technical developments\, and theoretical and modeling efforts. \nPrimary Chair:  Francesc Peters\, Institute of Marine Sciences (ICM\, CSIC)\, Barcelona\, Spain \nCo-chairs:  William M Landing\, Florida State University\, Department of Earth\, Ocean\, and Atmospheric Science\, Tallahassee\, FL\, United States\, Oliver Wurl\, Carl von Ossietzky Universität Oldenburg\, Institute for Chemistry and Biology of the Marine Environment\, Wilhelmshaven\, Germany and Brian Ward\, National University of Ireland\, Galway (NUIG)\, School of Physics\, Galway\, Ireland \n  \nBridging Microbial\, Stable Isotope\, and Micronutrient Approaches to Marine Carbon and Nitrogen RecyclingSession ID#: 28316Monday\, February 12\, 2018\, 08:00 AM – 10:00 AMPosters:  Monday\, February 12\, 2018\, 04:00 PM – 06:00 PM \nSession Description: \nThe efficiency of the ocean’s biological carbon pump is determined by the physical transport and cycling of both macro- (N\, P\, Si\, S\, O) and micro-nutrients (e.g. Fe\, Zn\, Co\, Cu\, Cd\, Ni\, Mn\, Mo\, V\, B\, Se). However\, even as our capability to measure nutrient concentrations and their isotopes have expanded to include basin-scale datasets\, we continue to be challenged by new insights with respect to variable plankton and organic matter stoichiometry\, lateral nutrient transport fluxes\, ‘new’ vs. ‘recycled’ nutrients\, metal-organics complexation\, scavenging rates\, variable remineralization rates\, elemental residence times\, and more. Here we welcome submissions that address macro- and micro-nutrient cycling and their effects on sustaining the marine carbon (e.g. export production) and nitrogen (e.g. nitrogen fixation\, denitrification) cycles. A wide breadth of scales (meso\, regional\, basin\, global; paleo\, present\, future) and scientific approaches to these questions are encouraged including observational\, theoretical\, modeling\, and isotopic studies. Finally\, we encourage submissions that work to bridge oceanographic disciplines. \nPrimary Chair:  Patrick A Rafter\, University of California Irvine\, Irvine\, CA\, United States \nCo-Chair:  Robert T Letscher\, University of New Hampshire\, Earth Sciences\, Durham\, NH\, United States and Alexis Pasulka\, California Polytechnic State University \n 
URL:https://www.geotraces.org/event/2018-ocean-sciences-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20170813
DTEND;VALUE=DATE:20170819
DTSTAMP:20260424T103128
CREATED:20160415T123823Z
LAST-MODIFIED:20190912T142043Z
UID:2016-1502582400-1503100799@www.geotraces.org
SUMMARY:Goldschmidt 2017
DESCRIPTION:Goldschmidt 2017Dates: 13 – 18 August 2017Location: Paris\, France \nFor further information: http://goldschmidt.info/2017/ \n GEOTRACES Event: \nPublic release of GEOTRACES Intermediate Data Product 2017Wednesday\, 16 August 2017\, 12h45 – 14h15\, Room 252A/B (Palais des Congrés de Paris) \nBuilding on the success of its first intermediate data product\, released in 2014\, the GEOTRACES programme will deliver the next Intermediate Data Product (IDP2017) at the Goldschmidt Conference in Paris. GEOTRACES is an international study of the marine biogeochemical cycles of trace elements and their isotopes. The IDP2017 presents a remarkable synthesis of data from the Atlantic Ocean and a more complete coverage of data from the Arctic\, Indian\, Pacific and Southern Oceans than was provided in IDP2014. Moreover\, it includes a larger range of biogeochemical parameters. \n \n  \n  \n  \n  \nGEOTRACES and GEOTRACES-relevant sessions: \n \n10i: Cycles of Trace Elements and Isotopes in the Ocean: GEOTRACES and Beyond Monday 14 August and Tuesday 15 August \nConvenors: Tim Conway\, Geraldine Sarthou\, Tianyu Chen\, Gregory de Souza\, Aridane G. González\, Kristen Buck\, Tina van de Flierdt\, Walter Geibert\, Zhimian Cao\, Catherine Jeandel\, Yves Plancherel\, Phoebe Lam \nTrace elements and their isotopes (TEIs) in the ocean are critical for marine life\, regulating ocean biogeochemistry and carbon cycling. TEI distributions also provide insight into ocean ventilation and circulation\, redox states\, productivity and hydrothermal inputs in the present and the past. The GEOTRACES program\, which aims to map the world’s oceans for TEIs\, has facilitated rapid progress\, enabling a coherent picture of TEI cycling to emerge. Accordingly\, in celebration of the launch of the GEOTRACES IDP 2017 at Goldschmidt\, this session aims to bring together studies addressing pressing questions in marine biogeochemistry. We invite submissions on a range of marine biogeochemical themes: (1) Comparing the distribution\, isotopic composition and speciation of the trace metals (Fe\, Zn\, Cd\, Ni\, Cu\, Ba) with the major nutrients (e.g. C\, N\, Si) in order to draw parallels and contrasts\, and especially to determine the role of the Southern Ocean in creating pre-formed signatures. (2) Investigating the oceanic distribution\, composition and interactions of TEI-binding organic ligands\, and their role in metal redox cycling\, distribution and speciation. (3) Investigating how interactions with oceanic boundaries (sediments\, hydrothermal vents\, atmosphere)\, (4) How abiotic/biotic internal cycling influences the distribution of oceanic TEIs\, and investigating TEIs which trace rates and particle scavenging. (5) Integrating multi-proxy GEOTRACES datasets including circulation tracers in order to address longstanding questions in biogeochemistry and paleooceanographic proxy calibrations. We encourage submissions with culture and modeling work to interpret TEI distributions\, as well as submissions combining interactions of different phases (e.g. particulate and dissolved) and multi-element datasets. \n10g: Submarine Groundwater Discharge: Forms\, Delivery\, Timing\, Processes\, Pathways and Scaling of Biogeochemical FluxesTuesday 15 August PM \nConvenors: Hans Dürr\, Nils Moosdorf\, Michael Böttcher\, Hannelore Waska\, Jing Zhang\, Walter Geibert \nSubmarine groundwater discharge (SGD) is now an established factor in marine budgets of nutrients as well as trace elements and their isotopes (TEIs). SGD can form subterranean estuaries (STE) where fresh meteoric groundwater mixes with seawater circulating in the sediment. Processes in the STE and at the sediment-water interface strongly influence the resulting net fluxes to the near-shore. The magnitude\, speciation and spatial variability of these diffuse biogeochemical inputs can have multiple impacts on biological activity in coastal environments and marginal seas\, many of which are considered key areas for regional GEOTRACES projects. However\, the temporal and spatial dynamics of processes determining SGD/STE biogeochemistry are poorly understood\, attempts of upscaling SGD for regional- to continental budgets have been difficult\, and lag behind the development of large-scale hydrogeological models of SGD. We invite contributions by geochemists\, hydrogeologists\, biologists and geophysicists related to: biogeochemistry (experimental and modeling) of SGD/STE from deep aquifers to the sediment-water interface with regards to distribution\, speciation and function of constituents; the dynamics of key biotic and abiotic processes in the STE; resulting net fluxes of SGD of nutrients\, micronutrients and tracers in the near-shore and in marginal seas; the behavior of particulates and their associated TEI distributions along coastal circulation and land-ocean gradients; approaches and strategies that connect multiple temporal and spatial scales. Studies related to regional anthropogenic effects and climate change are also welcome. We expect this session to facilitate joint investigations and cooperation of the regional terrestrial\, marine biogeochemical and ocean/environmental sciences community. \n10h: Non-Conventional Stable Isotopes in the Ocean: Novel Applications\, Technological Advances and Future Applications Wednesday 16 August PM and Thursday 17 AM \nConvenors: Horner Tristan\, Pearce Christopher\, Philip Pogge von Strandmann\, Kathleen Scheiderich\, Juan Carlos Silva-Tamayo \nThe past twenty years have seen an explosion of interest in using non-conventional stable isotope systems (‘non-CHONS’) to understand the relationships between—and temporal evolution of—the input\, internal cycling\, and output of chemical species from the ocean. These isotope systems have proved to be key tracers of Earth’s biogeochemical cycles\, and have provided important breakthroughs in our understanding of chemical fluxes across the major ocean boundaries (e.g. rivers\, atmosphere\, boundary exchange\, hydrothermal vents) as well as (bio)geochemical processes operating within the ocean (e.g. biological uptake and release\, speciation\, scavenging). This session invites contributions that offer novel perspectives using non-conventional isotope systems and the processes that control their cycling between Earth’s major reservoirs in modern and/or past settings. Submissions that present new analytical tools or experiment-based approaches for studying the mechanisms of elemental and isotope fractionation during mineral-fluid interactions\, redox transformations\, or biological cycling are strongly encouraged\, as are those that demonstrate how these techniques can be used to quantify the flux and internal cycling of chemical species in the ocean through time. We also welcome contributions that offer novel perspectives by synthesizing existing data into new conceptual models\, or use isotopic tracer-based approaches to aid constraint of the fluxes of other biogeochemically-cycled elements\, particularly those that integrate over a wide range of spatial and temporal scales. \n10m: Insights into Ocean Processes Through the Application of Radioactive Tracers Tuesday 15 August PM and Wednesday 16 August AM \nConvenors: Paul Morris\, Guizhi Wang\, Virginie Sanial \nThe use of radioactive tracers to investigate ocean processes is an increasingly mainstream component of the techniques available to marine chemists. This so-called “nuclear toolbox” has seen continued development\, from better sampling and measurement technology to smaller sample volumes\, which has opened new avenues of investigation for studying ocean processes. While many of these radioactive tracers occur naturally in the environment\, ocean scientists can also use radioactive tracers released through human activities via intentional releases and accidental events. These radioactive tracers can be applied to a range of time-scales in both local case studies and basin-scale investigations that target both boundary and open-ocean processes. This session welcomes submissions that use radioactive tracers as a primary tool to investigate: (1) fluxes of particulate matter and dissolved materials\, (2) water mass mixing and mixing rates\, (3) processes that occur at the ocean boundaries (including coastline\, seabed\, and surface)\, and (4) studies that attempt to constrain geochemical budgets. Contributions that address method development\, novel applications of well-established tracers to new systems\, transport and fates of anthropogenic radionuclides in the ocean\, and issues that arise from the inherent integrating properties of radioactive tracers are also welcomed. \n10n: Nutrient Biogeochemistry in the Ocean: Past\, Present and FutureWednesday 16 August \nConvenors: Scott Wankel\, Sinhué Torres-Valdés\, Kimberly Popendorf\, William Haskell\, Christian März\, Damien Cardinal\, Wiebke Mohr\, C. Mark Moore\, Francois Fripiat\, Xingchen Wang\, Jia-Zhong Zhang \nThe availability of nutrients\, specifically nitrogen (N)\, phosphorus (P) and silicon (Si)\, exerts strong control on net primary production in the oceans\, the efficiency of carbon export from the euphotic zone\, and even the composition of the atmosphere. While the cycling of these elements is intimately coupled\, each elemental cycle possesses distinct characteristics regarding oceanic sources and sinks\, modes of internal recycling\, residence times and bioavailability. Indeed\, dynamics of individual nutrients diverge in important ways\, leading to formation of distinct regimes in both modern and past ocean systems. For example\, our understanding of specific processes (such as N2 fixation) has greatly expanded over the past two decades including delineation of new habitats\, description of new organisms\, and identification of new lifestyles. Nevertheless\, the relative roles of specific groups in various regions of the ocean\, their spatial and temporal variability\, and factors influencing their activity and distribution remain unclear. Furthermore\, while clear changes are often observed in response to contemporary climate change (including ocean warming\, acidification and deoxygenation)\, responses to such alterations and consequences for ecosystem functioning are far from understood. This session brings together new analytical and modeling insights to marine environments advancing our fundamental understanding of nutrients and their importance to the Earth system of the past\, present and future. We encourage submissions highlighting novel approaches (especially application of natural abundance and tracer-level stable isotopes) and those dealing with inter-elemental (de)coupling\, multiple spatial scales (cells to oceans)\, and/or multiple temporal scales – from geologic past to the future. \n17g: Paleoceanographic and Paleoclimate proxies: Their standing on Elderfield’s proxy development CurveThursday 17 August \nConvenors: Marie-Laure Bagard\, Marie Boye\, Oscar Branson\, Sambuddha Misra\, Guillaume Paris\, Kauzyo Tachikawa \nGeochemical proxies are essential tools to understand the evolution of seawater chemistry\, climate of the past\, and cycling of material between the different surface and deep reservoirs of the planet. Professor Henry (Harry) Elderfield helped develop numerous chemical tracers in the sedimentary record of ocean circulation\, isotope systems and seawater chemistry and temperature\, deeply influencing our understanding of chemical oceanography\, atmospheric interactions\, paleoclimate\, and biomineralization. Harry noted that a proxy develops through phases of optimism\, to pessimism and eventually to realism as our understanding of the applicability and limitation of a proxy evolves – the infamous ‘Elderfield Curve’. We invite submissions that critically evaluate or apply new and established proxies of past-climate and seawater chemistry and redox state\, how they are influenced by processes such as diagenesis\, and consider or alter their position on the Elderfield Curve. Contributions are invited from studies that utilize new (e.g. U/Ca; Na/Ca; Li/Mg ∂7Li\, ∆47) and established (e.g. Mg/Ca; B/Ca; ∂11B\, ∂18O\, eNd\, uk’37\,) proxies for paleoclimate and paleoceanographic studies\, including proxies used for deep time reconstructions (e.g. Fe-speciation\, ∂98Mo\, ∂53Cr). The focus will be on studies that outline novel and multi-proxy applications from a range of sedimentary phases\, investigate the mechanisms behind them\, notably through laboratory experiments and modern observations (GEOTRACES\, porewaters\, continental input\,…) or highlight possible limitations of established ones. \n 
URL:https://www.geotraces.org/event/goldschmidt-2017/
CATEGORIES:GEOTRACES Relevant Special Sessions
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