BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//GEOTRACES - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:GEOTRACES
X-ORIGINAL-URL:https://www.geotraces.org
X-WR-CALDESC:Events for GEOTRACES
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20140330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20141026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20150329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20151025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20160327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20161030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20170326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20171029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20180325T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20181028T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20190331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20191027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20200329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20201025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230515T000000
DTEND;TZID=Europe/Paris:20230519T235959
DTSTAMP:20260424T121650
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230423T000000
DTEND;TZID=Europe/Paris:20230428T235959
DTSTAMP:20260424T121650
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220710T000000
DTEND;TZID=Europe/Paris:20220715T235959
DTSTAMP:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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
ATTACH;FMTTYPE=image/png:https://www.geotraces.org/wp-content/uploads/2021/02/Screenshot-2021-02-16-at-15.33.05.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20210604
DTEND;VALUE=DATE:20210625
DTSTAMP:20260424T121650
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
ATTACH;FMTTYPE=image/png:https://www.geotraces.org/wp-content/uploads/2021/04/Screenshot-2021-04-27-at-09.49.25.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201201
DTEND;VALUE=DATE:20201218
DTSTAMP:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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:20260424T121650
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
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20170813
DTEND;VALUE=DATE:20170819
DTSTAMP:20260424T121650
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
ATTACH;FMTTYPE=image/jpeg:https://www.geotraces.org/wp-content/uploads/2017/06/geotraces_logos_IDP2017_logo.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20170709
DTEND;VALUE=DATE:20170715
DTSTAMP:20260424T121650
CREATED:20161216T132357Z
LAST-MODIFIED:20161216T132357Z
UID:2045-1499558400-1500076799@www.geotraces.org
SUMMARY:IUPAC 2017 - World Chemistry Congress
DESCRIPTION:IUPAC 2017 – World Chemistry CongressDates: 9-14 July 2017Location: Sao Paulo\, BrazilFor further information: http://www.iupac2017.org/ \nAbstracts are due on January 8\, 2017 \nSession description: \nEnergy\, Water and Environmental Sciences (EE)http://www.iupac2017.org/symposia.php#ee \nNatural waters contain a large number of chemicals reflecting rapid global dissemination of novel substances\, including a full range of technology-critical elements (e.g.\, platinum group and rare earth elements) and emerging contaminants (e.g.\, PFAAs\, hormones and phthalates) employed to improve the production of energy and/or commodities\, especially due to the ever-expanding list of new technologies. The settlement of smart grids for electricity distribution together with the development of electric vehicles and renewable energy sources has enlarged a rising demand for advanced energy conversion and storage systems. Rechargeable batteries will continue to rely on Li-ion chemistry; however\, post Li-ion systems — such as Li-S\, Li-air\, Na-ion — are expected to reach the stage of devices. Also these developments are accompanied by the up growth of electrochemical capacitors\, fuel cells\, metal-air batteries. Solar cells\, biofuels\, water splitting\, hydrogen production and CO2 reduction are also important topics playing a leading role in the relation between energy and friendly environmental ways to assure a high efficiency of conversion and storage systems. To go further with sustainable technology\, the understanding of the fundamental concepts of materials properties and the interactions with their environment\, will be the key to find solutions which would satisfy the new society´s energy demands with a deep ecological concern. Therefore\, this symposium is devoted to recent progress in fundamental science related to rechargeable batteries and electrochemical capacitors\, fuel Cells\, metal-air batteries\, solar cells\, biofuels\, water splitting\, hydrogen production and CO2 reduction. Additionally\, this symposium will also focus on processes controlling the distribution\, fate\, bioavailability and environmental risks of technology-critical elements and emerging contaminants associated with the development of new products and technologies. \nSymposium Organizers: Roberto M. Torresi (IQ-University of São Paulo\, São Paulo\, Brazil – rtorresi@iq.usp.br) and Daniel Belanger (Département de chimie\, Faculté des Sciences\, University of Quebec\, Montreal\, Canada – belanger.daniel@uqam.ca).Co-organizer: Vanessa Hatje (CIEnAm- Universidade Federal da Bahia\, Bahia\, Brazil – vanessa@pq.cnpq.br) \nTopics \n5.7 Organic and inorganic contaminants in the environment: occurrence\, sources\, fate and impacts5.8 Trace elements cycling\, processes and fluxes across interfaces5.10 Environmental impact of emerging technologies (E-waste- an emerging global challenge and Global Environmental Challenges of Nanomaterials) \nConfirmed keynote speakers include: Antonio Cobelo\, Peter Croot\, Catherine Jeandel and Gideon Henderson \n 
URL:https://www.geotraces.org/event/iupac-2017-world-chemistry-congress/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20170509
DTEND;VALUE=DATE:20170514
DTSTAMP:20260424T121650
CREATED:20160707T144306Z
LAST-MODIFIED:20160707T144306Z
UID:2032-1494288000-1494719999@www.geotraces.org
SUMMARY:2017 PAGES Open Science Meeting
DESCRIPTION:2017 PAGES Open Science Meeting Dates: 9-13 May 2017Location: Zaragoza\, Spain \nFor further information: http://www.pages-osm.org \nGEOTRACES session: \n12. Trace elements and their isotopes as geochemical proxies of past ocean conditions \nCo-conveners: Catherine Jeandel (catherine.jeandel@legos.obs-mip.fr)\, Robert Anderson (boba@ldeo.columbia.edu)\, Susan Little (s.little@imperial.ac.uk)\, Thomas Marchitto (thomas.marchitto@colorado.edu) and Daniel Sigman (sigman@princeton.edu). \nTrace elements and their isotopes archived in marine sediments\, corals\, microfossils\, authigenic minerals and other media have been exploited widely to reconstruct past ocean conditions\, including\, but not limited to: temperature\, nutrient concentrations\, ocean circulation\, biological productivity and export production\, dissolved inorganic carbon system parameters\, and external sources of material to the ocean\, for example as dust or via boundary exchange. Despite this importance\, many proxies of necessity have been calibrated in a rather ad hoc way. Many calibrations use samples that do not necessarily represent modern conditions\, or they have been calibrated solely in the lab. Calibration is often empirical and based on only partial understanding of the processes that relate the measurable proxy to the environmental variable that it encodes. \nThere is therefore an urgent need for more thorough assessment of geochemical proxies to fully understand the uses and limitation of present proxies\, and to develop and reliably calibrate new proxies for environmental variables that are presently difficult to reconstruct. The wealth of new and high-resolution trace element and isotope data generated by GEOTRACES as well as by contemporary initiatives offers an unprecedented opportunity to assess our understanding of geochemical proxies. This session invites presentations that exploit modern ocean observations of trace elements and their isotopes to critically examine and improve the application of geochemical proxies of past ocean conditions. \nInvited Speakers: Chris Hayes (Univ. of Southern Mississippi)\, Tristan Horner (WHOI)\, Kazuyo Tachikawa (CEREGE) and Jimin Yu (Australian National University).
URL:https://www.geotraces.org/event/2017-pages-open-science-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20170226
DTEND;VALUE=DATE:20170304
DTSTAMP:20260424T121650
CREATED:20160415T122952Z
LAST-MODIFIED:20160415T122952Z
UID:2014-1488067200-1488585599@www.geotraces.org
SUMMARY:ASLO 2017\, Aquatic Sciences Meeting
DESCRIPTION:ASLO 2017\, Aquatic Sciences MeetingDates: 26 February – 3 March 2017Location: Honolulu\, Hawaii\, USA \nFor further information: http://www.sgmeet.com/aslo/honolulu2017/default.asp \n GEOTRACES sessions: \n004 – Biogeochemical Cycling of Trace Elements and Isotopes in the Arctic Ocean \nTrace elements can play a dual role in the ocean either as essential micronutrients (e.g.\, Co\, Fe\, Zn)\, or as toxicants (e.g.\, As\, Cu\, Hg)\, and can affect biological productivity\, carbon cycling and the emission of climatically important trace gases. In addition\, the distribution and isotopic composition of many trace elements and gases provide information on biogeochemical and physical processes. The Arctic Ocean\, in particular\, is undergoing rapid and profound transformation attributed to climate change. Easier access and accelerated resource exploitation are also expected in the coming years. It is therefore timely to examine more thoroughly the distribution and cycling of trace element and isotopes (TEI)\, and dissolved gases in the Arctic Ocean and to establish their potential role in controlling or recording rapidly changing oceanic processes. To that end\, after six years of collaborative planning\, the international GEOTRACES program undertook a coordinated study of TEIs\, dissolved gases\, and biological productivity in the Arctic in summer-fall 2015\, comprising three funded icebreaker programs from Germany\, Canada\, and the United States. This session seeks presentations on all aspects of this work and their relevance to Arctic Ocean processes from the GEOTRACES expeditions and other related field and laboratory efforts. \nORGANIZERS \nGreg Cutter\, Old Dominion University\, gcutter@odu.eduRoger Francois\, University of British Columbia\, rfrancoi@eos.ubc.caDavid Kadko\, Florida International University\, dkadko@fiu.eduWilliam Landing\, Florida State University\, wlanding@fsu.eduMichiel Rutgers Van der Loeff\, Alfred Wegener Institute\, Mloeff@awi.de \n  \n025 – Linking atmospheric deposition to the biogeochemistry of aquatic and marine systems \nAtmospheric deposition of lithogenic\, anthropogenic\, and marine aerosols is an important transport pathway for nutrients and contaminants to aquatic watersheds and the surface ocean. Constraining local\, regional\, and global atmospheric deposition fluxes and the bioavailability and toxicity of aerosol-sourced elements and compounds is essential to furthering understanding of global biogeochemical cycles. Aerosol emission\, transport\, and deposition processes are\, in part\, a function of changes in land use and anthropogenic emissions\, as well as short-term meteorological events and long-term climatic change on a global scale. Hence the study of system responses will improve our current understanding and facilitate the prediction of future impacts. This session invites contributions from studies of atmospheric deposition in marine and aquatic environments including\, but not limited to\, characterization of aerosol composition\, quantification of atmospheric deposition fluxes and aerosol fractional solubility\, assessment of the fate of aerosol-sourced compounds\, and the biological and chemical response to deposition. Contributions from global and regional scale field observations\, laboratory studies\, and modeling efforts are welcomed. \nORGANIZERS \nClifton Buck\, Skidaway Institute of Oceanography\, clifton.buck@skio.uga.eduRachel Shelley\, LEMAR-Universite de Bretagne Occidentale\, rachel.shelley@univ-brest.fr \n  \n029 – REE marine geochemistry in the 21st century: A tribute to the pioneering research of Henry Elderfield (1943-2016) \nHenry Elderfield had a long and multi-faceted career investigating the marine biogeochemistry of trace metals and his greatest accomplishment may be his groundbreaking measurements and interpretations of the oceanic distribution of rare earth elements (REEs). He helped revolutionize REE analysis of natural waters and produced some of the first vertical profiles in seawater by replacing painstaking chemical separations and neutron activation with isotope dilution mass spectrometry of 10 REEs together. In these days of automated in-line extraction and ICP-MS\, it is hard to recall the amount of time and effort involved in measuring picomolar REE concentrations just 30 years ago. To honor Henry’s memory we invite the next generation of aqueous geochemists to submit original work on REE cycling in the oceans. Our session will focus on the rapidly expanding dataset of REE concentrations and isotopic ratios from the GEOTRACES program and its use in the construction and testing of global marine mass balance and transport models. Studies of sources\, sinks\, and processes that create the boundary conditions for such modeling\, for instance particle scavenging and speciation\, hydrothermal and groundwater inputs\, and REE exchange in margin sediments\, estuaries\, and at the air-water interface are also welcome. \nORGANIZERS \nKaren H. Johannesson\, Tulane University\, kjohanne@tulane.eduJohan Schijf\, UMCES/Chesapeake Biological Laboratory\, schijf@cbl.umces.edu \n GEOTRACES Early Career Event: \nArctic-GEOTRACES Early Career Researcher Networking Event (ASLO 2017)26 February 2017 – 13h – Room: 305 A/B \nOver the 2015 and 2016 field seasons\, the international GEOTRACES program undertook a coordinated effort to better understand the distribution\, biogeochemical cycling\, and climate sensitivity of trace elements and isotopes (TEIs) within the Arctic Ocean. Three successful cruises were carried out in 2015 by Canadian\, US\, and German programs\, with follow-up sampling in 2016 by the German team. This effort brought together cross-disciplinary researchers from more than 12 countries working not only in the field of trace metal geochemistry\, but also observationalists and modelers studying phytoplankton physiology\, air-sea gas fluxes\, carbon and nutrient cycling\, ocean mixing\, sea ice\, and rivers. As a result\, new data sets are emerging to expand our understanding of the TEIs that regulate\, or serve as tracers for\, critical biogeochemical and physical processes within the Arctic Ocean. \nMore than 75 Early Career Researchers (ECRs: students\, postdocs and early career scientists) participated in the three Arctic Ocean cruises carried out in 2015\, with many more on the sidelines processing samples\, interpreting observations\, and developing ocean models. The goal of this workshop will be to provide a networking event for Arctic GEOTRACES ECRs who will be attending the ASLO Aquatic Sciences meeting. This forum will provide a bridge to connect ECRs between programs and establish new connections for participants to carry forward into their future careers within the GEOTRACES community. \nIdeal audience: “Early Career” Arctic GEOTRACES program participants\, including graduate students\, postdocs\, and new faculty \nTo register: All participants should send an RSVP before 25th of January. The way to do this is by filling up the following link: https://docs.google.com/spreadsheets/d/1D5a0lNLItm5x9X0bQMniutFEyOclUkxpspqb7ERb-8I/edit?usp=sharing \nAgenda (~3 hr Workshop): \n30 min (7-8 min each cruise): Introduction to each of the US\, Canadian\, German cruises\, and the focus\, cruise track\, and participants of each cruise \n30 min: 30 second introductions from each attendee about their role in the program (1 slide). \n60 min: breakout groups organized by theme/measurement type (to be decided). \n          * Goals of breakout groups: determine areas for collaborations\, emerging research themes\, future studies \n30 min: breakout group recap\, future plans \n30 min: Networking\, drinks and snacks!
URL:https://www.geotraces.org/event/aslo-2017-aquatic-sciences-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20170109
DTEND;VALUE=DATE:20170112
DTSTAMP:20260424T121650
CREATED:20160627T131247Z
LAST-MODIFIED:20160627T131247Z
UID:2031-1483920000-1484179199@www.geotraces.org
SUMMARY:Third Xiamen Symposium on Marine Environmental Sciences (XMAS)
DESCRIPTION:Third Xiamen Symposium on Marine Environmental Sciences (XMAS)Dates: 9-11 January 2017 Location: Xiamen\, China \nFor further information: http://mel.xmu.edu.cn/conference/3xmas \n GEOTRACES Session: \nSpecial Session 4: Biogeochemical Cycling of Trace Elements in the Ocean: GEOTRACES and Beyond \nConveners: \nMartin Frank\, GEOMAR Helmholtz-Center for Ocean Research Kiel\, GermanyJing Zhang\, University of Toyama\, JapanZhimian Cao\, Xiamen University \nTrace elements in the ocean are critical for marine life serving as regulators of ocean biogeochemistry including marine ecosystem dynamics. However\, the mechanisms controlling the biogeochemical cycling of these elements and how they influence the functioning of ocean ecosystems remain elusive. The GEOTRACES program\, which aims to map the world’s oceans for trace elements and isotopes\, has facilitated rapid progress in this field enabling a coherent landscape of oceanic trace element cycling to emerge. This session seeks to bring together recent studies in the spirit of the GEOTRACES program. We invite abstracts on all aspects of oceanic dissolved and particulate trace element distributions and speciation\, as well as their isotopes\, including their application to reconstructing marine processes such as ocean circulation\, redox conditions and paleoproductivity. We also encourage submissions using lab culture experiments and modeling approaches to constrain the biological and chemical processes that determine the distributions of trace elements in seawater. \n 
URL:https://www.geotraces.org/event/third-xiamen-symposium-on-marine-environmental-sciences-xmas/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20161105
DTEND;VALUE=DATE:20161110
DTSTAMP:20260424T121650
CREATED:20160606T073706Z
LAST-MODIFIED:20160606T073706Z
UID:2025-1478304000-1478735999@www.geotraces.org
SUMMARY:CBO 2016\, Congresso Brasileiro de Oceanografia
DESCRIPTION:VII Congresso Brasileiro de Oceanografia (CBO 2016) Dates: 5 – 9 November 2016Location: Salvador – Bahia\, Brasil \nFor further information: http://www.cbo2016.org/ \nGEOTRACES Special Sessions: \n*MS5 – GEOTRACES – BrasilCoordination: Vanessa Hatje (UFBA) \nThe aim of this session is to discuss the effects of biology and climate in the biogeochemistry of the trace elements and their isotopes\, in the interfaces between the continent\, the oceans and the atmosphere. \n  \nTraining Workshop: \n \n*MC11 – Ocean Data View para iniciantesSpeaker: Leticia C. da Cunha (UERJ)06/11/2016   Fee: R$100\,00 \nThis workshop is devoted to under-graduate\, post-graduate and scientists with no experience in the open access software Ocean Data View (ODV) software\, with a focus on the GEOTRACES data (trace elements) and SOCAT (Surface Ocean CO2 Atlas). \n  \n 
URL:https://www.geotraces.org/event/cbo-2016-congresso-brasileiro-de-oceanografia/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20160905
DTEND;VALUE=DATE:20160909
DTSTAMP:20260424T121650
CREATED:20160310T111310Z
LAST-MODIFIED:20160310T111310Z
UID:2008-1473033600-1473379199@www.geotraces.org
SUMMARY:Challenger Society 2016 Conference - Oceans and Climate
DESCRIPTION:Challenger Society 2016 Conference – Oceans and ClimateDates: 5-8th September 2016Location: Liverpool\, UK. \nFor further information: https://www.liverpool.ac.uk/challenger-conference-2016/ \nGEOTRACES session: \nTrace element and isotope exchange at ocean boundariesConveners: Will Homoky (Oxford)\, Torben Stichel (Southampton) & Susan Little (Imperial) \nTrace elements and their isotopes (TEIs) play a key role in the ocean\, as micronutrients and toxicants for primary production\, as indicators of anthropogenic inputs\, as tracers of modern and past ocean circulation\, and as proxies of the paleooceanic environment. A variety of ocean boundaries mediate the exchange of TEIs between the Earth and ocean\, including the atmosphere\, rivers\, groundwater\, glaciers\, sediments and sub-aqueous volcanism. However\, for many TEIs we have very little knowledge about the rates and mechanisms controlling their exchange. We invite studies of observed and/or modelled exchange of TEIs at ocean boundaries that provide new insights into these processes. \n 
URL:https://www.geotraces.org/event/challenger-society-2016-conference-oceans-and-climate/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20160626
DTEND;VALUE=DATE:20160702
DTSTAMP:20260424T121650
CREATED:20150907T073403Z
LAST-MODIFIED:20150907T073403Z
UID:1961-1466899200-1467417599@www.geotraces.org
SUMMARY:Goldschmidt 2016
DESCRIPTION:Goldschmidt 2016Dates: 26 June – 1 July 2016Location: Yokohama\, Japan \nThe abstract deadline is 26 February 2016.  \nFor further information: http://goldschmidt.info/2016/ \n  \nGEOTRACES Workshop: \nExploring GEOTRACES data with Ocean Data View     ***For more information please go to the Workshop website*** \nOrganizers: Jing Zhang\, Reiner Schlitzer\, Elena Masferrer Dodas \nThis hands-on workshop will teach standard and advanced ODV methods for the exploration and scientific analysis of environmental data. The GEOTRACES Intermediate Data Product 2014 (IDP2014) will be used as example dataset. Participants will learn how to create publication-ready maps\, property-property plots and sections and how to apply simple or advanced station and sample filters. In addition\, an overview over the wide range of derived variables available in ODV will be given and a number of variables often needed in geochemical research will be described and applied. This includes aggregation\, interpolation\, unit conversion\, differentiation and integration. Note that creation of spinning 3D scenes is beyond the scope of this workshop. The workshop starts with presentations of general software concepts and capabilities\, followed by hands-on-sessions for the creation of specific plot types and scientific discussion rounds explaining the findings. Participants are encouraged to bring their own laptop computer with ODV (http://odv.awi.de/) and the IDP2014 dataset (http://www.bodc.ac.uk/geotraces/data/idp2014/) already installed. Specific requests by participants prior to the workshop or during the event are welcome. \nGEOTRACES sessions: \n12d: Oceanic Cycling of Trace Elements Using Elemental\, Isotopic\, and Modeling Approaches: Geotracers and Beyond… \nConvenors: Tim Conway\, Tristan Horner\, Jessica Fitzsimmons\, Hajime Obata\, Catherine Jeandel\, Andrew Bowie\, Phoebe LamKeynote: Sylvia Sander (University of Otago) \nAbstract: The distribution of trace elements and their isotopes in the oceans results from a myriad of processes\, with these elements serving critical roles as regulators of ocean biogeochemistry including marine ecosystem dynamics. Despite this\, we still lack a complete understanding of not only the mechanisms by which these elements influence the functioning of ocean ecosystems\, but also the controls on the transfer of these elements at oceanic interfaces (e.g. atmospheric\, ice\, sedimentary\, shelf\, rivers\, and hydrothermal interfaces)\, and the processes that transform these critically important elements within the ocean interior. Recent concerted international endeavors such as the GEOTRACES Program are changing this picture and enabling a coherent landscape of oceanic trace element cycling to emerge. Accordingly\, this session seeks to bring together scientists from recent oceanographic expeditions to integrate results within and between ocean basins. We invite abstracts on all aspects of oceanic dissolved and particulate trace element distribution and speciation\, and we encourage submissions that apply novel analytical methods to understand elemental and isotopic (stable and radiogenic) distributions in the oceans\, including those that address metal speciation\, ligand binding\, and size-fractionated distributions. We especially encourage submissions that utilize modeling approaches which draw on new datasets and/or which aim to constrain the biological and chemical processes that determine the distributions of trace elements in seawater in the context of large-scale physical mixing\, or past and present ocean circulation\, redox conditions and hydrothermal activity. \n12f: Elemental and Isotopic Marine Biogeochemistry at a Range of Scales: The Global Ocean\, Marginal Seas\, and Polar Atmosphere–Sea Ice–ocean Systems \nConvenors: Susan Little\, Daiki Nomura\, Gregory de Souza\, Markus Frey\, Delphine Lannuzel\, Jun Nishioka\, Patrick Rafter\, Martin VancoppenolleKeynote: Daniel Sigman (Princeton University) \nAbstract: We invite observational and modelling studies of marine elemental and isotopic biogeochemical cycling at a range of spatial scales. Our broad purview includes large-scale studies of macro- (N\, Si) and micronutrients (e.g. Zn\, Fe\, Cu\,) and other biogeochemically-cycled elements (e.g. Ba\, Cd)\, as well as regional studies with a focus on the biogeochemistry of the the polar sea-ice zone (Arctic and Antarctic). By providing an interdisciplinary forum\, this session aims to find parallels (and contrasts) between the isotope systems of macro- and micro-nutrients\, and to better understand the components\, drivers\, processes and interfaces related to the cycling of carbon\, nutrients\, and trace elements and their isotopes (TEIs) within the polar atmosphere–sea ice–ocean system. Studies covering the spectrum of possible scales from whole-ocean budgets to molecular-scale fractionation are solicited\, especially those that form a part of the GEOTRACES programme. In particular\, we invite studies attempting to pick apart the roles of the physical circulation and internal oceanic cycling (e.g. biological uptake\, scavenging\, speciation) on tracer distributions\, including the role of particulates and their associated TEI distributions. Submissions from the polar hydrosphere\, atmosphere and cryosphere are solicited\, including those related to polar climate change\, river-ocean interaction\, snow and sea ice physics and biogeochemistry\, polar atmospheric chemistry and ocean acidification. \n16d: Models of Life and Geochemistry: Integrating Large-Scale Datasets into Global Climate Models \nConvenors: Seth John\, Tatiana Ilyina\, Andy Ridgwell \nAbstract: ew global datasets and global modeling techniques can be brought together to study questions of biological\, geochemical\, and climatic importance. This session focuses on the utilization of large-scale datasets within a variety of modeling frameworks. Recent global datasets include shipboard ocean chemical observations such as GEOTRACES and WOCE\, shipboard time-series programs\, and sensor data such as Argo\, mooring\, and remote sensing data. Each of these observational datasets can be studied within the context of various global modeling techniques including coupled GCMs and high-resolution regional models as well in conjunction with relatively newly developed and numerically-efficient global-scale tools such transport matrix models (TMMs) and decadal predictions systems. We seek contributions from scientists working across a broad spectrum of global biogeochemical cycles including carbon\, nitrogen\, oxygen\, nutrient\, trace-metal\, and particle distribution in the oceans\, and the application of such tracers for constraining ocean circulation as well as sources and sinks of biologically and geochemically important elements and their variability in the ocean. We also encourage submissions rooted in modern geochemical observations that address future biogeochemical changes in the ocean by forward modelling. \nGEOTRACES related-sessions: \n14j: Linked Landscapes: Biogeochemical Connections Among Headwater Streams\, Rivers\, Estuaries and Coastal Ecosystems \nConvenors: Nobuhito Ohte\, David Widory\, Scott Wankel\, Taylor Maavara\, Philippe Van Cappellen\, Pierre Regnier\, Ronny Lauerwald\, Dipankar Dwivedi\, Carl Steefel \nAbstract: Rivers and their surrounding landscapes are the great integrators of the freshwater cycle and they represent the main pathway for biogeochemical transfers from land to ocean. An understanding of the mechanisms governing the linkages throughout the aquatic continuum is crucial for predicting ecosystem function\, water quality\, greenhouse gas emissions and the role of the coastal ocean in global carbon budgets. The structure and function of riverine\, estuarine and coastal ecosystems are strongly affected by surrounding terrestrial ecosystems through a combination of hydrologic and biogeochemical dynamics and feedbacks\, including hyporheic exchange. However\, a mechanistic understanding of the nature of these linkages and feedbacks is lacking\, particularly at the watershed- to global-scales. Investigating these knowledge gaps is complicated by the unprecedented rates of change over the last 100 years to the absolute and relative fluxes of elements such as C\, N\, P\, S\, Si\, Fe and Ca\, delivered by rivers to lakes and coastal zone. Here\, we invite observational and theoretical contributions that identify and characterize: 1) biogeochemical linkages among terrestrial\, river and coastal ecosystems\, 2) the influence of local settings (geology\, hydrology\, climate\, ecotypes\, etc.) on these biogeochemical linkages\, and 3) the time-dependent and coupled responses of riverine biogeochemical fluxes and transformations to anthropogenic drivers. Specific topics may include\, but are not limited to\, eutrophication and nutrient loading in aquatic systems\, internal nutrient recycling\, nutrient elimination/mitigation\, river damming and channelization\, multi-scalar properties of the hyporheic exchange flows that impact nutrient cycling\, and impacts on trace gas fluxes (e.g.\, methane\, nitrous oxide). \n15b: Radionuclide Fate and Transport after the Fukushima Accident: Identifying What We Have Learned and Remaining Knowledge Gaps \nConvenors: Anne Mathieu\, Daniel I. Kaplan\, Yoshiho Takahashi\, Seigo Amachi\, Fan Qiaohui\, Yuichi Onda\, Chris Yeager\, Tsuyoshi Thomas Sekiyama\, Mizuo KajinoKeynote: Yuichi Onda (Tsukuba University) \nAbstract: In 2011\, an earthquake of magnitude 9\, followed by a tsunami\, triggered a major nuclear accident at the Fukushima Daiichi Nuclear Power Plant that released radionuclides in the environment. Five years after the Fukushima disaster\, a milestone has been reached. One of the key conclusions made to date\, is that while many studies have identified similarities to other nuclear accident sites\, such as Chernobyl\, studies have also revealed new insights into radionuclide transport owing to the circumstances surrounding the Fukushima accident\, such as the direct injection of radioactivity into the ocean. While significant progress has been made\, many uncertainties remain. The objective of this session is to not only present advances\, but also identify key knowledge gaps that are limiting further advancement in these areas of research. Any research on the fate and transport of radionuclides related to the Fukushima accident is welcome in this session. In particular\, papers are encouraged that integrate monitoring\, experimental\, and/or modeling approaches to add perspective and understanding to the recent accident in Fukushima. Relevant topics also include radionuclide biogeochemistry influencing transport in terrestrial and marine systems. \n15e: Isotope Approaches to Characterize the Impacts of Natural Resource Development and Other Human Activities on the Environment \nConvenor: Millot RomainKeynote: Nathaniel R. Warner (Pennsylvania State University) \nAbstract: Recent analytical developments of isotope systematics\, for instance metals and metalloids (Hg\, Cr\, Zn\, Cu\, Pb\, Cd\, Tl\, Ag\, Sn\, U\, Fe\, Se\, Mo\, U\, Ra\, Th) in the Environment\, have experienced an unprecedented increase over the past few years. It is well known that: 1- metals mining and both conventional and unconventional hydrocarbon extraction can have a considerable environmental footprint\, 2- within the framework of the exploitation of unconventional gases and oil\, chemical elements potentially toxic to humans and wildlife (called the radionuclides toxic metals: RTM) pollute the flowback\, 3- more generally the contribution of human activities such as industries\, agriculture and various domestic inputs\, becomes more and more significant in natural systems.The aim of this session is to explore methods\, indicators and research applications using innovative isotope systematics of elements such as H\, C\, N\, O\, S and Hg\, Zn\, Cr\, Cu\, Cd\, Mo\, Ag\, Se\, that in fine will provide: i) stronger constraints on the origin(s) and ii) a better characterization of the processes controlling the budgets of toxic metals and compounds in the Environment (e.g.\, soil\, sediment\, water\, air) at local and global scales\, in addition to transfer of these constituents to the food chain and potential effect on human health. \n15l: Advances in Mercury Biogeochemistry \nConvenors: Colin Cooke\, Jeroen SonkeKeynote: Daniel Obrist (DRI\, Reno Nevada\, USA) \nAbstract: Mercury is a global pollutant that\, once converted to methylmercury\, can negatively impact human health. Present-day anthropogenic emissions of mercury are approximately an order of magnitude greater than natural emissions\, and the chemical speciation of Hg dramatically affects its mobility and toxicity. Understanding the environmental cycling of mercury is paramount if reductions to mercury exposure are to be achieved. We invite presentations focused on field\, laboratory and modeling studies of the sources\, transport and fate of mercury in Earth surface environments (atmosphere\, oceans & continents)\, including human exposure. We particularly welcome the use of novel approaches including but not limited to genomics\, enriched Hg isotopes\, stable Hg isotopes\, spectroscopy\, 3D coupled models\, Hg-Se interactions etc. \n16a: Tracing Ocean Circulation – Past and Present \nConvenors: Ruza Ivanovic\, Tina van de Flierdt\, David WilsonKeynote: Geoffrey (Jake) Gebbie (Woods Hole Oceanographic Institution) \nAbstract: Ocean circulation is an important part of the Earth system\, playing a key role in controlling or responding to climate change. With limited direct observations for ocean currents and mixing\, geochemical tracers are a valuable tool for reconstructing ocean circulation\, past and present. Increasingly\, such tracers are being incorporated into complex numerical climate models\, the observational database is being expanded\, and better knowledge of what influences the geochemical archives is being gained. These recent improvements in modelling and measuring tracers enable a more thorough understanding of ocean-climate interactions on a range of timescales. For this session\, we invite contributions that use measured and/or modelled geochemical tracers to constrain ocean dynamics in the past and present. We particularly encourage submissions that link changes in ocean circulation and mixing with surface climate.
URL:https://www.geotraces.org/event/goldschmidt-2016/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20160221
DTEND;VALUE=DATE:20160227
DTSTAMP:20260424T121650
CREATED:20140416T094200Z
LAST-MODIFIED:20190912T142043Z
UID:1900-1456012800-1456531199@www.geotraces.org
SUMMARY:2016 Ocean Sciences Meeting
DESCRIPTION:2016 Ocean Sciences Meeting Dates: 21-26 February 2016Location: New Orleans\, Louisiana\, USA. \nFor more information: http://osm.agu.org/2016/ \nGEOTRACES and GEOTRACES-related Town Halls:  \nTown Hall “Opportunities to Strengthen Your Science (and Proposals) using GEOTRACES Data”  \nThursday\, February 25\, 2016: 6:30 PM – 7:30 PMLocation: Ernest N. Morial Convention Center\, 228-230   \nDescription: GEOTRACES released its first intermediate data product ( IDP2014)\, featuring dissolved trace elements and their isotopes\, during the 2014 Ocean Science meeting. The next data product (IDP2017) will more than double the amount of data and number of variables\, including particulate elements. This town hall will: 1) Inform the community about strategies to access\, download and manipulate data from IDP2014 and provide preliminary information about IDP2017; 2) Seek feedback from users of IDP2014 to improve IDP2017 and make it as user-friendly as possible; and 3) Present the outcome of the first Iron-Model Intercomparison Project (FeMIP)\, in which comparison to GEOTRACES data allowed an unprecedented assessment of model performance.  \n \nTowards a standard\, user-friendly chemical speciation model for seawater and estuarine waters \nMonday\, February 22\, 2016 — 12:45-1:45 pmLocation: Ernest N. Morial Convention Center\, 228-230 \nThere is at present no community-agreed model for calculating speciation – particularly of key trace metals\, the carbonate system\, and including the various definitions of pH – in oceanic and estuarine environments. Consequently\, chemical speciation calculations are often of uncertain accuracy\, and are neither traceable nor repeatable by others. SCOR Working Group 145 aims to (i) develop an internationally agreed speciation model based on the Pitzer equations to address these problems\, and (ii) make this model available through a user-friendly web tool. This Town Hall meeting will present the draft scope of the model and seek comments from potential users. \n GEOTRACES-sessions: \nAtmospheric deposition and ocean biogeochemistry \nMonday\, February 22\, 2016\, 228-230: 8-10 am\, Poster Hall: 4-6 pm \nPrimary Chair: Ana M Aguilar-Islas\, University of Alaska Fairbanks\, Fairbanks\, AK\, United StatesChairs: Clifton S Buck\, Skidaway Institute of Oceanography\, Savannah\, GA\, United States and Meredith Galanter Hastings\, Brown Univ-Geological Sciences\, Providence\, RI\, United States \nSession Description: \nAtmospheric deposition of marine\, lithogenic and anthropogenic aerosols is an important transport pathway for nutrients and contaminants to the surface ocean. Constraining local\, regional and global atmospheric deposition flux estimates and the bioavailability of aerosol-derived elements and compounds is essential for furthering understanding of ocean biogeochemistry. This transport pathway acts as an important chemical bridge between the lithosphere and hydrosphere linking major biogeochemical cycles. Aerosol emission\, transport and deposition processes are\, in part\, a function of global change related to changes in land coverage\, anthropogenic emissions and climate. Hence the study of ocean responses will improve our ability to predict future impacts. The GEOTRACES international program includes objectives related to the atmospheric input of trace elements and isotopes to accomplish its goal. Other programs\, such as SOLAS and CLIVAR\, continue to make significant contributions as well. This session invites contributions from studies of atmospheric deposition in the marine environment\, including observations of atmospheric deposition fluxes\, aerosol composition\, aerosol fractional solubility\, the fate of aerosol-derived compounds and the biological and chemical response to deposition within the surface ocean. Contributions from global and regional scale field observations\, laboratory studies and modeling efforts are welcomed. \nThe role of particles in the cycling of trace elements and their isotopes in the ocean \nTuesday\, February 23\, 2016\, 228-230: 8-10 am\, 2-4 pm\, Poster Hall: 4-6 pm \nPrimary Chair: Hélène Planquette\, LEMAR\, CNRS\, Plouzané\, France Chairs: Phoebe J Lam\, University of California Santa Cruz\, Department of Ocean Sciences\, Santa Cruz\, CA\, United States and Benjamin S. Twining\, Bigelow Lab for Ocean Sciences\, East Boothbay\, ME\, United States \nSession Description: \nA number of trace metals are thought to control marine ecosystem features and biological productivity. While trace elements in the dissolved phase have been the focus of many investigations\, we are still largely ignorant of the large scale distribution of particulate trace elements and their size partitioning and chemical composition. The GEOTRACES program\, which aims to provide a comprehensive view of the distribution of trace elements and their isotopes (TEIs) in the world’s oceans\, is providing new insights on these aspects. Furthermore\, there is a crucial need to understand the exchange mechanisms between particulate and dissolved pools\, including adsorption\, desorption\, aggregation\, precipitation\, biological uptake and remineralization processes. This session seeks to bring together scientists interested in better constraining the role of ocean particles in the biogeochemical cycles of TEIs\, in different oceanic environments\, such as the continental shelves and slopes\, the nepheloid layers\, or the particle-poor regions of the open ocean. We invite abstracts on all aspects of oceanic particulate TEIs\, through experimental\, in situ and modeling approaches. \nTrace Elements and Isotopes at the Interfaces of the Atlantic Ocean \nMonday\, February 22\, 2016\, 228-230: 10:30 am-12:30 pm\, Poster Hall: 4-6 pm \nPrimary Chair: Geraldine Sarthou\, LEMAR UMR 6539 CNRS UBO IRD IFREMER\, IUEM\, Plouzané\, FranceChairs: Edward A Boyle\, Massachusetts Institute of Technology\, Earth Atmospheric and Planetary Sciences\, Cambridge\, MA\, United States\, Gideon Mark Henderson\, University of Oxford\, Earth Sciences\, Oxford\, United Kingdom and Micha J.A. Rijkenberg\, Royal Netherlands Institute for Sea Research\, Den Burg\, Netherlands \nSession Description: \nTrace elements play a crucial role in the ocean. Some are toxic at high concentrations\, others serve as essential micronutrients in the many metabolic processes active in marine organisms. Some trace elements and their isotopes (TEIs) are diagnostic and allow the quantification of specific oceanic mechanisms. Studying the biogeochemical cycles of TEIs is thus necessary to deepen our understanding of carbon and nutrient cycling\, climate change\, ocean ecosystems and environmental contamination. The Atlantic Ocean is one of the primary CO2 sinks of the world ocean and one of the most biologically productive. Recently\, full-depth high resolution measurement campaigns\, especially in the framework of the international GEOTRACES program\, have revolutionized our understanding of the TEI cycling in the Atlantic Ocean. However\, processes occurring at the oceanic interfaces are very complex and need more attention. The aim of this session is to increase our understanding of the exchange of TEIs at the interfaces between the ocean and i) the atmosphere\, ii) the continents (e.g. by rivers and groundwater)\, iii) the marine sediments\, and iv) the ridges. We will particularly encourage contributions dealing with interdisciplinary studies\, with new insights gained by application of state-of-the-art analytical tools and modeling approaches. \nTrace Metal Bioavailability and Metal-Microorganism Interactions  \nThursday\, February 25\, 2016\, 228-230: 8-10 am\, Poster Hall: 4-6 pm \nPrimary Chair: Julia M Gauglitz\, Woods Hole Oceanographic Institution\, Marine Chemistry and Geochemistry\, Woods Hole\, MA\, United StatesChairs: Randelle Bundy\, Woods Hole Oceanographic Institution\, Marine Chemistry and Geochemistry\, Woods Hole\, MA\, United States and Jill N Sutton\, IUEM/UBO\, Technopôle Brest-Iroise\, Place Nicolas Copernic\, Plouzané\, France \nSession Description: \nThe distributions of trace elements in the marine environment are undeniably linked to biological processes. Low concentrations or low bioavailability of trace metals in the water column can lead to micronutrient limitation and stress\, while greater availability may increase biological demand and enhance the growth of microorganisms. Recent advances in high throughput biological techniques\, including “omics”\, as well as high-resolution geochemical data from the GEOTRACES program (www.geotraces.org) has lead to a wealth of new data. However\, meaningful interpretation of these data often still relies on process studies\, incubation-based experimental work\, or the culturing of representative or novel organisms. This session invites contributions on every scale of metal-microorganism interactions\, ranging from small-scale mechanistic work to large-scale biogeochemical cycle studies. We encourage abstracts that investigate trace metal acquisition strategies\, cellular metabolism\, chemical speciation and bioavailability\, and/or studies that link trace metal and biological water column data. Presentations that strive to better understand the biological control exerted on the distribution of trace elements in the marine environment are especially encouraged. \nTrace metal speciation in seawater: measurements\, modelling and impact on marine biogeochemistry \nWednesday\, February 24\, 2016\, 228-230: 8-10 am\, 2-4 pm\, Poster Hall: 4-6 pm \nPrimary Chair: David R Turner\, University of Gothenburg\, Gothenburg\, SwedenChairs: Stan MG van den Berg\, University of Liverpool\, Liverpool\, L69\, United Kingdom\, Sylvia Gertrud Sander\, University of Otago\, Dunedin\, New Zealand\, Kristen N Buck\, University of South Florida Tampa\, Tampa\, FL\, United States\, Rachel Shelley\, LEMAR/UBO\, Brest\, France\, Peter L Morton\, Florida State University\, Department of Earth\, Ocean\, and Atmospheric Science\, Tallahassee\, FL\, United States\, Christian Schlosser\, GEOMAR Helmholtz Centre for Ocean Research Kiel\, Chemical Oceanography\, Kiel\, Germany and Eric P. Achterberg\, GEOMAR Helmholtz Centre for Ocean Research Kiel. \nSession Description: \nGlobal change processes\, in particular ocean acidification\, are changing the chemistry of seawater. The carbon dioxide system and trace metal speciation are expected to be among the chemical components of seawater most strongly affected by global change processes. The distribution and identity of organic metal complexing ligands in the marine system\, and modelling of the chemical speciation using updated parameters\, play an important role in understanding the changes that take place and in projecting future changes. This session builds on two SCOR working groups : WG139 which is focused on organic metal-binding ligands; and WG145 which is focused on modelling metal speciation in seawater. One aspect of metal speciation that is receiving particular attention is the bioavailability of trace metals\, with extensive measurement programmes on the complexation of bioactive trace metals currently under way\, in particular within the GEOTRACES program. This work is producing exciting new field data that will benefit from improved speciation modelling and additional measurements. We invite contributions on the identification\, distribution and provenance of organic ligands in the marine environment\, the modelling of inorganic and organic metal speciation\, and linkages of trace metal speciation with ocean acidification and other factors of climate change. \nGEOTRACES-related sessions descriptions:  \nVariability in Southern Ocean Productivity over Different Timescales \nThursday\, February 25\, 2016\, Poster Hall: 4-6 pmFriday\, February 26\, 2016\, 215-216: 10:30 am-12:30 pm \nPrimary Chair: Alessandro Tagliabue\, University of Liverpool\, Liverpool\, United KingdomChairs: Philip Boyd\, IMAS\, ACE-CRC\, University of Tasmania\, Hobart\, Australia\, Eugene W Domack\, University of South Florida St. Petersburg\, St Petersburg\, FL\, United States and Amy Leventer\, Colgate University\, Geology\, Hamilton\, NY\, United States \nSession Description: \nSouthern Ocean productivity plays an important role in regulating marine resources\, ocean biogeochemistry and the global carbon cycle. Canonically\, variations in iron supply and demand are thought to regulate the variations in phytoplankton productivity. However\, via the actions of ocean physics\, the Southern Ocean also encounters substantial fluctuations across space and time in temperature\, sea ice and glacial ice dynamics and the availability of light and/or macro- and micro-nutrients. How these regulatory factors act individually and in combination to shape the dynamics of biological activity across food webs in different Southern Ocean regions and different timescales is not well understood. This hampers our ability to project with confidence how future environmental change will affect this important ecosystem. In particular we lack an understanding of how variations in the physical and/or biogeochemical environment are underpinned and connected to the broader picture of ecosystem structure\, as well as wider biogeochemical feedbacks. We invite presentations from field\, laboratory\, remote sensing\, modelling and paleo studies that seek to unravel the dynamics of the Southern Ocean marine ecosystem from a seasonal or decadal or millenial scale viewpoint. Efforts to combine insights across disciplines and scales from physics to biogeochemistry to ecosystems are actively encouraged. \n \nGEOTRACES Tutorial: \nT014: What Controls the Distribution of Dissolved Iron in the Ocean? \nTuesday\, February 23\, 2016\, 03:30 PM – 04:00 PMLocation: Ernest N. Morial Convention Center – RO3 \nPrimary Chair: Alessandro Tagliabue\, University of Liverpool\, Liverpool\, L69\, United Kingdom \nSession Description: \nDue to its role as a limiting nutrient in the Southern Ocean\, the role for iron in governing how ocean productivity influences wider biogeochemical cycling and atmospheric carbon dioxide levels is well accepted. Around twenty years ago the first compendium of dissolved iron observations was published\, enabling initial insights into the controls on its cycling and distribution. Today the number of compiled iron observations stands in the tens of thousands and is growing further thanks to the efforts of the GEOTRACES programme. In this tutorial I will review the new insights gained into the controls on the oceanic iron distribution that illuminates important roles for a range of sources and identifies crucial components of its biological cycling. These emerging ideas place important constraints on our efforts to represent the iron cycle in the global ocean models used for integrating to basin and global scales\, as well as climate prediction. In this context I will discuss how the role for iron in controlling past atmospheric carbon dioxide and future ocean productivity has matured. Finally\, I will highlight the key challenges that need to be tackled over the coming years\, with an emphasis on the opportunities provided by additional observational constraints. \n 
URL:https://www.geotraces.org/event/2016-ocean-sciences-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20151214
DTEND;VALUE=DATE:20151219
DTSTAMP:20260424T121650
CREATED:20140415T100844Z
LAST-MODIFIED:20140415T100844Z
UID:1899-1450051200-1450483199@www.geotraces.org
SUMMARY:American Geophysical Union Fall 2015 Meeting
DESCRIPTION:American Geophysical Union Fall 2015 MeetingDates: 14-18 December 2015Location:  San Francisco\, California\, USA \nFor further information: http://fallmeeting.agu.org/2015/ \nGEOTRACES related sessions: \nGC067: Trace Metal Cycling in the Environment – 40 Years of AdvancementsConvenors: (1) Priya Ganguli (2) Frank Black (3) Sergio Sanudo-Wilhelmy (4) Ed BoyleSession ID#: 8771Invited Speakers:Rob Mason\, University of ConnecticutPeter Swarzenski\, US Geological SurveyKristen Buck\, University of Southern Florida \nOur understanding of metal cycling in the modern environment has been revolutionized by improvements in sample handling (i.e.\, trace metal clean techniques) and by innovations in technology. These advancements have enabled researchers to accurately quantify trace metal concentrations in a range of media (water\, air\, sediment\, biota)\, and thereby evaluate system response to key environmental reforms\, such as the U.S. Clean Water Act of 1972 and the global effort to phase out leaded gasoline\, which began in 1973. It is timely to assess our understanding of trace metal cycling in the modern environment as we embark on new global efforts to protect human and ecosystem health\, such as the 2013 Minamata Convention on Mercury. We solicit presentations on trace metal cycling in a variety of systems\, including water\, atmosphere\, sediment\, and biota. We are particularly interested in research that evaluates trends and/or draws biogeochemical links among environmental spheres._______________________________________Note: Russ Flegal\, who was instrumental in promulgating trace metal clean techniques and advancing our understanding of metal cycling in the environment\, is retiring from UC Santa Cruz this academic year. This session will provide an opportunity to celebrate the breadth of his contributions to the field. \nA035: Dust in High Latitudes: From its Origins to its ImpactsPrimary Convener: Santiago Gasso\, GESTAR/NASA\, Silver Spring\, MD\, United StatesSession ID#: 8015Conveners: John Crusius\, USGS Western Regional Offices Seattle\, Seattle\, WA\, United States\, Gisela Winckler\, Lamont -Doherty Earth Observatory\, Palisades\, NY\, United States and Paul A Ginoux\, NOAA Princeton\, Princeton\, NJ\, United States \nFrom long records of dust in ice cores to present day satellite imagery of dust blown off the coasts of Alaska\, Iceland and the Patagonia desert\, observations show how dust in high latitudes is pervasive and sustained over hundreds of thousands of years. High latitudes amplify dust effects on climate through their interactions with ice clouds\, reduction of surface albedo\, and the transport/supply of micronutrients to the surface ocean\, triggering phytoplankton blooms and affecting biogeochemical cycles. Yet\, most research on dust has focused on the subtropical regions and the areas around the dust belt. In this session we would like to focus on dust research at high latitudes\, and we invite presentations addressing all aspects of emission\, transport and impacts of dust (or volcanic ash) \, from the geologic past and the present\, as well as model simulations of the future. \n  \nOS010: Exploring the Dust-Ocean Connection in a Changing ClimatePrimary Convener: Maurice Levasseur\, Laval University\, Quebec-Ocean\, Quebec City\, QC\, CanadaSession ID#: 8749Conveners: William L Miller\, University of Georgia\, Athens\, GA\, United States and Mitsuo Uematsu\, University of Tokyo\, Bunkyo-ku\, Japan \nOcean-atmosphere interactions take different forms. Every year\, the atmosphere delivers massive amounts of nutrients to the global Ocean\, often relieving nutrient limitations and thus altering primary production and various related chemical pathways and feedbacks to the atmosphere. These fertilization events\, which include desert dust and volcanic ash depositions\, are episodic and mostly unpredictable\, hence notoriously difficult to study. While considerable advances have been made during the last few years on the global distribution of these deposition events and on their impact on ocean biogeochemistry the question remains: Can we confidently extrapolate current understanding to a high CO2 world? In this session\, we seek contributions on all aspects of this fascinating connection between the continents\, the atmosphere and the ocean. Papers exploring the importance of global change (climate warming\, change in wind patterns\, ocean acidification\, ocean stratification\, etc.) on dust emission\, transport and impact on the ocean are particularly welcomed.
URL:https://www.geotraces.org/event/american-geophysical-union-fall-2015-meeting/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20150928
DTEND;VALUE=DATE:20151003
DTSTAMP:20260424T121650
CREATED:20150514T123628Z
LAST-MODIFIED:20150514T123628Z
UID:1956-1443398400-1443830399@www.geotraces.org
SUMMARY:22nd ISEB Symposium\, Dynamics of Biogeochemical Systems: Processes and Modeling
DESCRIPTION:22nd International Society for Environmental Biogeochemistry (ISEB) SymposiumDynamics of Biogeochemical Systems: Processes and ModelingDates: 28 September – 2 October 2015Location: Piran\, Slovenia. \nAbstract submission deadline: June 15\, 2015. \nFor futher information: www.iseb22.ijs.si \nGEOTRACES Special Session: \nMarine and coastal environments – Special session: GMOS and GEOTRACES
URL:https://www.geotraces.org/event/22nd-iseb-symposium-dynamics-of-biogeochemical-systems-processes-and-modeling/
CATEGORIES:GEOTRACES Relevant Special Sessions
END:VEVENT
END:VCALENDAR