BEGIN:VCALENDAR VERSION:2.0 PRODID:-//GEOTRACES - ECPv6.15.18//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: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 END:VTIMEZONE BEGIN:VEVENT DTSTART;VALUE=DATE:20180812 DTEND;VALUE=DATE:20180818 DTSTAMP:20260405T222447 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:20180916 DTEND;VALUE=DATE:20180920 DTSTAMP:20260405T222447 CREATED:20180109T132621Z LAST-MODIFIED:20180109T132621Z UID:2073-1537056000-1537401599@www.geotraces.org SUMMARY:An Ocean of Opportunity DESCRIPTION:An Ocean OpportunityDates: September 16-20\, 2019 Location: Honolulu Convention Center\, HI For further information: www.oceanobs19.net\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\n\n\n\n\nThe organizers of OceanObs’19 are soliciting abstracts of Community White Papers describing aspirations for the coming decade from all interested groups. The Community White Papers should promote international collaboration and large-scale sustained ocean observing efforts\, and address one or ideally more of the seven (anticipated) themes (Discovery\, Ecosystem Health & Biodiversity\, Climate Variability & Change\, Water\, Food\, & Energy Security\, Pollution & Human Health\, Hazards & Maritime Safety\, and Blue Economy) and two crosscutting themes on data information system and ocean observing governance topics. \nBased on the contributed abstracts of Community White Papers\, the OceanObs’19 Program Committee will solicit full Community White Papers to be submitted by end of September 2018. The Program Committee may recommend that authors of particular abstracts collaborate and merge the concepts described in separate abstracts to develop a joint Community White Paper. The papers will be peer-reviewed and published in an open access journal before the conference.  \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nWe seek abstract contributions that provide solutions to build and enhance connections between end users and ocean observations in relation to one or more of the conference themes.  Additionally\, abstracts should focus on (one or more of the following):  \n\nStrategies to address social and economic needs including the development of the Blue Economy;\nEmerging science concepts that require multidisciplinary sustained observations (i.e. biological\, biogeochemical\, physical\, geological\, social and economic\, etc.);\nThe value of existing ocean observations and their potential relevance in an evolving ocean observing system;\nThe requirements for sustaining and enhancing ocean observing capabilities;\nThe development of new observing technologies and networks\, including identification of new transformative directions for ocean observing;\nAdvances in open data\, information technology\, and governance systems;\nObservational or observation-model synthesis;\nThe need for improved processes to better support research and operations;\nInnovations in engagement with end-user communities.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\n\n\n\nCONFERENCE INFORMATION:\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nThe main goal of the conference will be to further develop effective strategies for a sustained\, multidisciplinary and integrated ocean observing system\, and to better connect user communities and observers. End user communities include operational users\, national and local authorities as well as researchers\, from the public and private sectors.  Engagement with international user communities can take diverse forms\, including closer interaction to better target their needs for ocean observing networks and derived products while better informing management decisions. OceanObs’19 will continue the tradition of building the vision of ocean users and observers.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nBACKGROUND:\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nAs part of the decadal conference series\, OceanObs’19 will galvanize the ocean observing community ranging from scientists to end users. OceanObs’19 seeks to improve response to scientific and societal needs of a fit-for-purpose integrated ocean observing system\, for better understanding the environment of the Earth\, monitoring climate\, and informing adaptation strategies as well as the sustainable use of ocean resources.   OceanObs’99 resulted in an internationally coordinated system for physical climate and ocean carbon observations. OceanObs’09 expanded the range of communities working together to undertake more comprehensive ocean observations and led to the Framework for Ocean Observing. OceanObs’19 will seek to advance these outcomes by extending its reach the full spectrum of ocean communities.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\nExpected Schedule\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nDec 18\, 2018: Release of call for abstracts of Community White Papers March 15\, 2018: Due date for abstract submission March 15 – April 30\, 2018: Program Committee reviews and consolidates Community White Paper list April 30\, 2018: Invitations to group authors for Community White Papers September 30\, 2018: Community White Papers due\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nFor any additional information\, please reach out to info@oceanobs19.net or check out www.oceanobs19.net for up-to-date info!  URL:https://www.geotraces.org/event/an-ocean-of-opportunity/ CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20180919 DTEND;VALUE=DATE:20180922 DTSTAMP:20260405T222447 CREATED:20180905T102418Z LAST-MODIFIED:20180905T102418Z UID:2096-1537315200-1537574399@www.geotraces.org SUMMARY:BioGEOTRACES Japan DESCRIPTION:BioGEOTRACES JapanDates: 19-21 September 2018Location: Nagasaki University\, Nagasaki\, Japan \nProgramme \nThe Programme of this workshop is available to download. URL:https://www.geotraces.org/event/biogeotraces-japan/ CATEGORIES:GEOTRACES Scientific Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20181021 DTEND;VALUE=DATE:20181026 DTSTAMP:20260405T222447 CREATED:20180319T091400Z LAST-MODIFIED:20180319T091400Z UID:2085-1540080000-1540511999@www.geotraces.org SUMMARY:DISCO XXVI DESCRIPTION:DISCO XXVI (Dissertations Symposium in Chemical Oceanography 26)Dates: 21-25 October 2018Location: Kona\, Hawai’i\, USA \nFor further information: http://www.soest.hawaii.edu/DISCO/DISCO_symposium/index.htm URL:https://www.geotraces.org/event/disco-xxvi/ CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20181106T080000 DTEND;TZID=Europe/Paris:20181109T170000 DTSTAMP:20260405T222447 CREATED:20171204T132054Z LAST-MODIFIED:20171204T132054Z UID:2072-1541491200-1541782800@www.geotraces.org SUMMARY:SPERA 2018 DESCRIPTION:SPERA 2018: Bringing Environmental Radioactivity Research to Western Australia Dates: 6th – 9th November 2018Location: Perth\, Australia  \nFor more information: http://www.promaco.com.au/events/spera2018/  \nBackground \n The South Pacific Environmental Radioactivity Association (SPERA) would like to invite professionals\, researchers\, and students to join the SPERA Conference in Perth\, WA. SPERA meetings are an invaluable venue for scientific exchange amongst those that work on environmental radioactivity\, open to all professionals\, researchers and students. \n The program will cover all aspects of environmental radioactivity\, ranging from advances in methods\, new research in radioecology and work being conducted on emergency preparedness and in contaminated sites. We aim to have as many oral presentations as possible in the various sessions\, as well as a large selection of posters that shall boost debate and discussion amongst attendees. This will be complemented by several exciting talks by invited speakers and by a one-day workshop on Radiotracers in the Environment\, co-organised with the RACI Radiochemistry Division. \n The conference will take place at The University of Western Australia. This is located 5 minutes from Perth CBD and is positioned alongside Perth’s iconic Swan River. \n Program Tuesday\, 6th November: Pre-conference workshop – RACI Radiochemistry Division Wednesday\, 7th November: Conference Day 1 Thursday\, 8th November: Conference Day 2 Friday\, 9th November: Conference Day 3 \nSPERA 2018 Organising Committee Prof. Pere Masque. Edith Cowan University Dr. Viena Puigcorbé. Edith Cowan University Ms. Gloria Salgado. Edith Cowan University Dr. Sandra Sdraulig. Australian Radiation Protection and Nuclear Safety Agency Mr. Peter Medley. Environmental Research Institute of the Supervising Scientist Prof. Ian McArthur. The University of Western Australia \n  URL:https://www.geotraces.org/event/spera-2018/ CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20181108 DTEND;VALUE=DATE:20181111 DTSTAMP:20260405T222447 CREATED:20181107T100122Z LAST-MODIFIED:20181107T100122Z UID:2101-1541635200-1541894399@www.geotraces.org SUMMARY:BioGEOTRACES Workshop DESCRIPTION:BioGEOTRACES WorkshopDates: 8-10 November 2018Location: Johnsson Center\, Woods Hole\, USA \nFor further information\, please contact Maite Maldonado. \nAgenda \nThe agenda of the meeting is available to download. URL:https://www.geotraces.org/event/biogeotraces-workshop/ CATEGORIES:GEOTRACES Meetings END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20181114 DTEND;VALUE=DATE:20181117 DTSTAMP:20260405T222447 CREATED:20180716T135122Z LAST-MODIFIED:20180716T135122Z UID:2090-1542153600-1542412799@www.geotraces.org SUMMARY:SCOR-InterRidge Meeting DESCRIPTION:SCOR-InterRidge Meeting on “Mid-Ocean Ridges and Other Geological Features of the Indian Ocean”Dates: 14-16 November 2018Location: Goa (India) \n\nRegistration for SCOR-InterRidge Meeting on “Mid-Ocean Ridges and Other Geological Features of the Indian Ocean”\, organized on 14-16 November 2018 in Goa (India)\, is now open. Scientists interested by the themes of the meeting (see below) are invited to mark the dates\, register to the meeting\, and share this information with their colleagues! \nRegistration & Practical Information: \nPlease see the meeting brochure for payment\, accommodation\, abstract submission and other practical information and register to the meeting starting from today! Deadline for registration: 10 August 2018. A limited number of travel fellowship will be offered by SCOR and InterRidge based on the the situation and motivation of the applicant\, followed by a first-come\, first-served basis. Please apply for travel fellowship when registering. \nGoals: \nThe workshop will focus on the geological\, geophysical\, geochemical and physical aspects of the mid-ocean ridges and the other geological features in the Indian Ocean and provide a forum for exchange of ideas and results. Both the Ridge community and the Marine Geology and Geophysics community are only marginally involved in the International Indian Ocean Expedition – 2 (IIOE-2) and therefore one of the major goals is to develop new international collaboration and programs on geology and geophysics of the Indian Ocean\, under IIOE-2. The budget allocated by SCOR and InterRidge will mostly be used to allow students\, young scientists\, and other scientists to participate.  \nThemes: \nThe following seven themes cover the main peculiarities of the Indian Ocean ridges and geology: \n\n\nIndian Ocean mid-ocean ridges: hydrothermalism\, fragile ecosystem\, and deep-sea mining exploration \n\n\nIndian Ocean mid-ocean ridges: tectonics and magmatism in a wide range of spreading rates \n\n\nEvolving lithosphere of the Indian Ocean: from mid-ocean ridges to basins to active or passive margins \n\n\nComplex physical and geochemical aspects of the Indian Ocean mid-ocean ridge system \n\n\nAseismic ridges\, oceanic plateaus\, micro-continents and seamounts of the Indian Ocean \n\n\nImplications of the collision and subduction on the complex history of the Indian Ocean \n\n\nSubmarine fans and sedimentation history in the Indian Ocean \n\n\nThe meeting brochure contains all details on payment\, accommodation\, abstract submission etc. Click here to register to the meeting. \n============================================= \nContact: Kamil Szafrański – The InterRidge Coordinator at interridge@ipgp.fr \n \n  URL:https://www.geotraces.org/event/scor-interridge-meeting/ CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20181203 DTEND;VALUE=DATE:20181206 DTSTAMP:20260405T222447 CREATED:20171120T135914Z LAST-MODIFIED:20171120T135914Z UID:2067-1543795200-1544054399@www.geotraces.org SUMMARY:GEOTRACES-PAGES Synthesis Workshop DESCRIPTION:GEOTRACES-PAGES Synthesis workshop: Trace Element and Isotope Proxies in PaleoceanographyDates: 3 – 5 December 2018Location: Aix-Marseille\, France. \nFor further information: Please visit the Workshop web page: https://geotracespages.sciencesconf.org/ \nReport from the Workshop: https://doi.org/10.22498/pages.27.1.35 \nBackground \nThe joint GEOTRACES/PAGES workshop on the synthesis of geochemical proxies used in paleoceanography aims to establish the strength\, limits and conditions of application of a given proxy. \nThere is a vital need for a synthesis of geochemical proxies used in paleoceanography to improve interpretation of commonly used proxies. This synthesis is timely in view of the wealth of new data coming from GEOTRACES and contemporary programs. \nThe workshop will bring together expertise from GEOTRACES\, PAGES\, and the broader oceanographic community of observationalists and modellers that will exploit new data to provide a more rigorous calibration of proxies and interpretation of their records. \nWorking groups \nAll participants will choose 1 or 2 working groups: \nBiological productivityOceanic circulationParticle flux and sedimentation ratePhysical and/or biogeochemical modelling. \nTravel support \nFinancial travel support will be available for about 60 participants in the form of subsidies for airfare and ground transportation (capped depending on travel origin). Hotel rooms and meals will be provided by the organizers: 2 nights for participants from Europe and 3 nights for participants from overseas (4 nights for US participants). Those who can cover their own travel expenses are encouraged to do so. \nThe planning committee will select participants to receive travel support based on a review of pre-registration information received by the deadline of 1 June 2018. The anticipated contribution to the workshop goals will be used as the basis for selection among the applicants. \nDecisions will be communicated to participants in July. Selected participants will then be invited to finalize their registration for the workshop. The organizers will take care of the hotel booking for funded participants for the duration of the workshop. \nSponsors \nPAGES\, GEOTRACES\, SCOR\, US-NSF\, CNRS-INSU-LEFE\, CEREGE\, Aix-Marseille Université and John Cantle Scientific Ltd. \nWorkshop planning committee \nRobert Anderson – Lamont-Doherty Earth Observatory\, USADamien Cardinal\, LOCEAN\, Sorbonne Université\, FranceMartin Frank – GEOMAR Helmholtz Centre for Ocean Research\, Kiel\, GermanyChris Hayes – University of Southern Mississippi\, USAGideon Henderson – University of Oxford\, UKTristan Horner – Woods Hole Oceanographic Institution\, USACatherine Jeandel – Observatoire Midi Pyrenees\, FranceSusan Little – Imperial College\, UKMarie-France Loutre – PAGES International Project Office\, SwitzerlandThomas Marchitto – University of Colorado\, USAElena Masferrer Dodas – GEOTRACES International Project Office\, FranceKatharina Pahnke – Max Planck Research Group – Marine Isotope Geochemistry\, GermanyKazuyo Tachikawa – CEREGE\, FranceLaurence Vidal – Aix-Marseille Université\, FranceJimin Yu – Australian National University\, AustraliaLiping Zhou – Peking University\, China \nReport \nThe Report from the Workshop is available to read and download here. It is also available on PAGES web site here. \nFurther information \nIf you have questions regarding the workshop\, please contact Kazuyo Tachikawa or Laurence Vidal. \nWorkshop information is available on the official workshop website: https://geotracespages.sciencesconf.org/ \n \n  URL:https://www.geotraces.org/event/geotraces-pages-synthesis-workshop/ CATEGORIES:GEOTRACES Scientific Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20181206 DTEND;VALUE=DATE:20181208 DTSTAMP:20260405T222447 CREATED:20181107T100337Z LAST-MODIFIED:20181107T100337Z UID:2102-1544054400-1544227199@www.geotraces.org SUMMARY:GEOTRACES Standards and Intercalibration Committee Meeting DESCRIPTION:Standards and Intercalibration Committee MeetingDates: 6-7 December 2018Location: MIO\, Marseille\, France URL:https://www.geotraces.org/event/geotraces-standards-and-intercalibration-committee-meeting-11/ CATEGORIES:GEOTRACES Meetings END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190106 DTEND;VALUE=DATE:20190110 DTSTAMP:20260405T222447 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:20190211 DTEND;VALUE=DATE:20190214 DTSTAMP:20260405T222447 CREATED:20180905T074308Z LAST-MODIFIED:20180905T074308Z UID:2094-1549843200-1550102399@www.geotraces.org SUMMARY:7th Kaplan Symposium: Tracers in the Sea DESCRIPTION:7th Kaplan Symposium: Tracers in the SeaTrace Elements and their Isotopes in the Oceans\, Future Directions and Instrumental FrontiersDates: 11-13 February 2019Location: Eilat\, Israel \nFor detailed information on the scientific background\, venue\, schedule and registration\, please see the symposium website: https://sites.google.com/view/7th-kaplan-symposium \nRegistration and abstract deadline: 30 November2018 \nThemes \n· Trace element cycling in seawater and marine particulates· The role of atmospheric dust in marine biogeochemistry· Novel isotope systems in the oceans· Instrumental developments in marine geochemistry \nInvited speakers \nEric Achterberg\, GEOMAR\, Germany \nMark Altabet\, University Massachusetts Dartmouth\, USA \nBob Anderson\, Lamont-Doherty Earth Observatory\, Columbia University\, USA \nGideon Henderson\, Oxford University\, UK \nCatherine Jeandel\, LEGOS\, University of Toulouse\, France \nWilliam Landing\, Florida State University\, USA \nClaire Rollion-Bard\, Institut de Physique du Globe de Paris\, France \nSunil Kumar Singh\, Physical Research Laboratory\, Ahmedabad\, India URL:https://www.geotraces.org/event/7th-kaplan-symposium-tracers-in-the-sea/ CATEGORIES:GEOTRACES Scientific Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190220 DTEND;VALUE=DATE:20190223 DTSTAMP:20260405T222447 CREATED:20180810T091615Z LAST-MODIFIED:20180810T091615Z UID:2093-1550620800-1550879999@www.geotraces.org SUMMARY:Training Course on Marine Radioactivity DESCRIPTION:Training Course on Marine RadioactivityDates: 20-22 February 2019Location: University Puerto Rico\, San José\, Puerto Rico \nFor further information: http://mel.xmu.edu.cn/conference/marrad_2019/ URL:https://www.geotraces.org/event/training-course-on-marine-radioactivity/ CATEGORIES:Other Training Activities of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190223 DTEND;VALUE=DATE:20190303 DTSTAMP:20260405T222447 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:20190407 DTEND;VALUE=DATE:20190413 DTSTAMP:20260405T222447 CREATED:20190121T145041Z LAST-MODIFIED:20221115T103330Z UID:2106-1554595200-1555113599@www.geotraces.org SUMMARY:EGU2019\, European Geosciences Union General Assembly DESCRIPTION:European Geosciences Union General Assembly 20189(EGU2019) Dates: 7-12 April 2019 Location: Vienna\, Austria For further information:https://www.egu2019.eu/   URL:https://www.geotraces.org/event/egu2019-european-geosciences-union-general-assembly/ CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190421 DTEND;VALUE=DATE:20190426 DTSTAMP:20260405T222447 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:20190611 DTEND;VALUE=DATE:20190613 DTSTAMP:20260405T222447 CREATED:20190121T142342Z LAST-MODIFIED:20190121T142342Z UID:2104-1560211200-1560383999@www.geotraces.org SUMMARY:GEOTRACES Standards and Intercalibration Committee Meeting DESCRIPTION:Standards and Intercalibration Committee MeetingDates: 11-12 June 2019Location: Old Dominion University\, Norfolk\, Virginia URL:https://www.geotraces.org/event/geotraces-standards-and-intercalibration-committee-meeting-12/ CATEGORIES:GEOTRACES Meetings END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190613 DTEND;VALUE=DATE:20190620 DTSTAMP:20260405T222447 CREATED:20190121T143009Z LAST-MODIFIED:20201120T145658Z UID:2105-1560384000-1560988799@www.geotraces.org SUMMARY:2019 Gordon Research Conference on Chemical Oceanography DESCRIPTION:2019 Gordon Research Conference (GRC) and Seminar (GRS) on Chemical Oceanography\nDates: 13-19 July 2019\nLocation: Holderness School\, Holderness\, NH\, USA \nGRC: Discovering Chemical Processes and Mechanisms in a Changing Ocean \nThe study of ocean chemistry is central to the understanding of global biogeochemical cycling and human sustainability. Since this GRC conference began 50 years ago\, great progress has been achieved in the fundamental understanding of the chemistry of the oceans. Yet there is a great deal to be learned about how the chemical species and their inventories in the oceans interact with physical\, geological\, biological\, biochemical\, and chemical processes. Moreover\, there are now a myriad of anthropogenic influences that are also likely changing marine geochemical and biogeochemical cycles. \nThis conference will highlight the leading edge of research in chemical oceanography with a focus on elucidating key processes and discovering mechanisms relevant to understanding large scale biogeochemical cycles in the oceans. Topics will explore key chemical reactions that influence biogeochemical processes\, examine reaction rates and what controls them\, applications of biochemical approaches\, large scale observations\, modeling and synthesis\, deep-time changes in ocean chemistry\, fluxes across interfaces\, and developments in instrumentation. This conference aims to connect researchers united by a common interest in improving our understanding of the changing chemistry of the oceans\, and to catalyze future research in understanding the biogeochemical cycles of marine environments. \nThe 2019 GRC will be preceded by a Gordon Research Seminar (GRS) in Chemical Oceanography that is open to graduate students and postdocs in Chemical Oceanography and related fields. The GRS provides a forum for early career researchers to present research results\, promote networking\, and to conduct career building discussions within a peer-to-peer setting. The GRS is chaired by two graduate students and will include an invited keynote speaker. \nDeadlines: \n\nApplications for the GRC meeting must be submitted by June 16\, 2019.\nApplications for GRS must be submitted by June 15\, 2019\n\nFor further information Gordon Research Seminar (GRS): https://www.grc.org/chemical-oceanography-grs-conference/2019/\nFor further information Gordon Research Conference (GRC): https://www.grc.org/chemical-oceanography-conference/2019/ URL:https://www.geotraces.org/event/2019-gordon-research-conference-on-chemical-oceanography/ CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20190708T080000 DTEND;TZID=Europe/Paris:20190718T170000 DTSTAMP:20260405T222447 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:20190818 DTEND;VALUE=DATE:20190824 DTSTAMP:20260405T222447 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;VALUE=DATE:20190907 DTEND;VALUE=DATE:20190909 DTSTAMP:20260405T222447 CREATED:20180927T082833Z LAST-MODIFIED:20180927T082833Z UID:2099-1567814400-1567987199@www.geotraces.org SUMMARY:2019 GEOTRACES Data Management Committee Meeting DESCRIPTION:2019 GEOTRACES DMC MeetingDates:  7-8 September 2019Location: Hobart\, Tasmania.\n  URL:https://www.geotraces.org/event/2019-geotraces-data-management-committee-meeting/ CATEGORIES:GEOTRACES Meetings END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190909 DTEND;VALUE=DATE:20190912 DTSTAMP:20260405T222447 CREATED:20180927T082711Z LAST-MODIFIED:20180927T082711Z UID:2098-1567987200-1568246399@www.geotraces.org SUMMARY:2019 GEOTRACES Scientific Steering Committee Meeting DESCRIPTION:2019 GEOTRACES SSC MeetingDates: 9-11 September 2018Location: Hobart\, Tasmania \n  URL:https://www.geotraces.org/event/2019-geotraces-scientific-steering-committee-meeting/ CATEGORIES:GEOTRACES Meetings END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190912 DTEND;VALUE=DATE:20190914 DTSTAMP:20260405T222447 CREATED:20200311T160644Z LAST-MODIFIED:20210726T123319Z UID:6133-1568246400-1568419199@www.geotraces.org SUMMARY:Southern Ocean Biogeochemistry Workshop DESCRIPTION:Background \n\n\n\nThe workshop will bring together national and international scientists as well as local students and researchers in biogeochemical oceanography\, modelling and paleoceanography focused on the Southern Ocean’s response to climate change. It will also discuss the development of collaborative projects including GEOTRACES process studies. \n\n\n\nProgramme \n\n\n\nThe Workshop programme is available to download here. URL:https://www.geotraces.org/event/southern-ocean-biogeochemistry-workshop/ LOCATION:IMAS\, IMAS Waterfront Building\, University of Tasmania\, Hobart\, Australia CATEGORIES:GEOTRACES Scientific Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20190923 DTEND;VALUE=DATE:20190929 DTSTAMP:20260405T222447 CREATED:20190402T132216Z LAST-MODIFIED:20210726T123303Z UID:2110-1569196800-1569715199@www.geotraces.org SUMMARY:GEOTRACES Summer School DESCRIPTION:GEOTRACES Summer SchoolDates: 23-28 September 2019Location: Cadiz\, Spain \n\n\n\n\n\n\n\n \n\n\n\nBackground \n\n\n\nThe second GEOTRACES summer school will be held between the 23rd and 28th September 2019 in Cadiz\, Spain\, on board of the school ship Intermares A-41.  \n\n\n\nGEOTRACES summer schools aim at teaching the skills and knowledge necessary for a good understanding of the biogeochemical cycles of trace metals. General lectures will be given by 10 world-leading international scientists and practical sessions including field sampling workshops will be ran throughout the week. \n\n\n\nThe summer school is open to 36 students. The maintenance and lodging on board of the Intermares school vessel during the course will be covered for all students. \n\n\n\nOrganizers \n\n\n\nUniversity of Cádiz (UCA)\, the Andalusian Institute of Marine Sciences of the Spanish National Research Council (ICMAN-CSIC)\, the International Campus of Excellence of the Sea (CEI·MAR) and the International GEOTRACES programme. \n\n\n\nCall for applications \n\n\n\nPlease read the call for applications for information on the application procedure\, the summer school fees and the scholarship programme available. \n\n\n\nDeadline for applications \n\n\n\nPre-registration is open until May 15th\, 2019. Applications will be subject to selection. \n\n\n\nFor more information and applications \n\n\n\nPlease visit the summer school web site: https://geotraces.uca.es/ \n\n\n\nSponsors \n\n\n\nScientific Committee on Oceanic Research (SCOR)\, GEOTRACES\, General CSIC Foundation\,  International Doctorate School of Marine Studies (EIDEMAR) and CEI·MAR. URL:https://www.geotraces.org/event/geotraces-summer-school-2/ CATEGORIES:GEOTRACES Training Activities END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20191208 DTEND;VALUE=DATE:20191211 DTSTAMP:20260405T222447 CREATED:20191016T090044Z LAST-MODIFIED:20210726T123244Z UID:3419-1575763200-1576022399@www.geotraces.org SUMMARY:Asia GEOTRACES Workshop: Sources/sinks and internal cycling of mercury and other TEIs in the Northwest Pacific Ocean DESCRIPTION:Asia GEOTRACES Workshop:Sources/sinks and internal cycling of mercury and other TEIs in the Northwest Pacific OceanLocation: Qingdao\, Shandong\, ChinaDates: December 8-10\, 2019 \n\n\n\nDownload the announcement \n\n\n\nAbout the workshop \n\n\n\nGEOTRACES project covers global oceans\, including the Northwestern Pacific Ocean (NWPO). However\, the knowledge on regional distributions and internal cycling of trace elements and their isotopes (TEIs) in seawaters in the NWPO is still limited. \n\n\n\nFor example\, mercury (Hg) cycling in the oceans has drawn extensive public concerns because of the production of methylmercury (MeHg) in the marine environments. The produced MeHg can then be biomagnified via food chain\, bioaccumulated to high concentrations in organisms at high trophic levels and pose great threat to human health. Some efforts have been made on investigating the distribution and cycling of Hg in the Pacific Ocean. East Asia is the largest source region for Hg. Large amounts of Hg were discharged into the ocean via riverine input and atmospheric deposition\, highlighting the importance of this region in Hg studies. However\, there is lack of studies on the distribution and cycling of Hg in the NWPO. Few mercury data following the GEOTRACES protocols were reported in this region and controlling processes and factors for Hg cycling in the NWPO are largely unknown. \n\n\n\nAs major GEOTRACES ocean interfaces\, exchange between atmosphere and surface water\, sediments and the overlying water column significantly influence the net sources and sinks for dissolved TEIs in seawater\, as well as the internal cycling of TEIs in the NWPO. However\, little is known about net supplies of TEIs from sediments and atmosphere as well as the key processes and key areas for the supplies in the NWPO. The marginal seas in the NWPO\, such as Bering Sea\, Sea of Okhotsk\, East China Sea\, and South China Sea\, receive significant amount of lithogenic and anthropogenic substances from fluvial input and submarine groundwater discharge. These marginal seas are also important source areas that supply trace elements to the NWPO\, which can highly influence TEIs cycling in open ocean. The major transport processes and fluxes for TEIs in each individual marginal sea remain to be explored. The major western boundary current of the NWPO\, the Kuroshio\, flows exactly through the region between the marginal seas and the NWPO\, passing by the eastern ends of Philippine and Taiwan and mixed with the seawater originated from the East and South China Seas\, then going northeastern direction to form the Kuroshio extension. The dynamic Kuroshio system not only links the NWPO and its marginal sea but also indicates the necessity for regional collaboration to fully understanding TEIs cycling in the oceanic region. \n\n\n\nAn Asia GEOTRACES Workshop\, organized by Ocean University of China\, will be held in Qingdao on December 8-10\, 2019. In this workshop\, we plan to invite GEOTRACES scientists in Asia as well as other regions to evaluate a full picture of the current status of the studies on the major sources/sinks and internal cycling processes of TEIs in seawater (emphasized on mercury) in the NWPO\, and to generate a future regional collaboration and action plan for Asia GEOTRACES. \n\n\n\nTopics \n\n\n\n1) Mercury in the NWPO (Part I) \n\n\n\nContributions of Asia marginal seas to mercury in the Pacific OceanMercury speciation and cycling in the NWPOMercury international inter-calibration and strengthening the capability of marine Hg analysis and study in the AsiaDiscussion on the Part II: Mercury international inter-calibration during the testing cruise via “Dongfanghong III”\n\n\n\n2) TEls fluxes and processes at ocean interfaces \n\n\n\nAtmospheric depositionContinental run-off (e.g. fluvial input and submarine groundwater discharge)Interaction between marginal seas and Kuroshio waterSediment-water boundary\n\n\n\nOrganizers \n\n\n\nJingling Ren\, Yanbin Li\, Qian Liu\, Jing Zhang\, Meixun Zhao \n\n\n\nVenue and Accommodation \n\n\n\nThe workshop will be held in Badaguan Hotel (Shanhaiguan Road 19\, Qingdao\, Shandong). The workshop organizer has contracted a special rate with the Badaguan Hotel (380 RMB per night (tax included)) and can book the rooms for the attendees if needed (please fill out the pre-registration form and send it to Ms. Yan Wang (wangyan2843@ouc.edu.cn) before November 15\, 2019). \n\n\n\nAbstract Submission and Pre-registration \n\n\n\nThere is no registration fee for this workshop. Deadline for the pre-registration and abstract submission is November 15\, 2019 (please send the filled pre-registration form and the abstract to Ms. Yan Wang (wangyan2843@ouc.edu.cn) before the deadline. \n\n\n\nWorkshop Agenda \n\n\n\nDecember 8\, RegistrationDecember 9\, Sessions and DiscussionDecember 10\, Sessions and Discussion \n\n\n\nContact \n\n\n\nDr. Yanbin Li Phone：+8613969878395；Email: liyanbin@ouc.edu.cn \n\n\n\nDr. Qian LiuPhone：+8613012462801；Email: liuqian@ouc.edu.cn \n\n\n\nMs. Yan Wang Phone：+8615066806036；Email: wangyan2843@ouc.edu.cn \n\n\n\nThis workshop is supported by the Ocean University of China.                                                    URL:https://www.geotraces.org/event/asia-geotraces-workshop-sources-sinks-and-internal-cycling-of-mercury-and-other-teis-in-the-northwest-pacific-ocean/ LOCATION:Badaguan Hotel\, Qingdao\, Shandong\, China CATEGORIES:GEOTRACES Scientific Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200207 DTEND;VALUE=DATE:20200208 DTSTAMP:20260405T222447 CREATED:20200310T101402Z LAST-MODIFIED:20210726T120639Z UID:5983-1581033600-1581119999@www.geotraces.org SUMMARY:2nd Russian GEOTRACES Seminar DESCRIPTION:The 2nd Russian GEOTRACES seminar was held in February 7\, 2020 in Moscow at the Shirshov Institute of Oceanology\, Russian Academy of Sciences (https://ocean.ru). Eric Achterberg initiated the GEOTRACES seminar during his visit as part of the Helmholtz team. About 50 people attended the seminar in Moscow and some people listened to the presentation remotely in Sevastopol\, Kaliningrad\, and Arkhangelsk. The presentation aroused a great interest among the seminar participants. \n\n\n\nOrganizers \n\n\n\nProf. Dr. Eric Achterberg (SSC member)\, PhD Marina Kravchishina (SSC member) and Prof. Dr. Piotr Zavyalov (Corresponding Member of Russian Academy of Sciences (RAS)\, Shirshov Institute of Oceanology of RAS\, chairman of the regular academic council meeting). \n\n\n\nIntroduction \n\n\n\n12:00 (about 15 min) \n\n\n\nPiotr Zavyalov welcomed the colleagues of IO RAS and guests from other Institutes and Universities (Lomonosov Moscow State University\, Russian Federal Research Institute of Fisheries and Oceanography and etc). He then introduced Prof. Dr. Eric Achterberg (Chemical Oceanography GEOMAR\, Helmholtz Centre for Ocean Research Kiel and Christian-Albrechts University Kiel\, Germany\, member of the international GEOTRACES program) who initiated the GEOTRACES seminar. \n\n\n\nMarina Kravchishina reported about GEOTRACES activity in Russia and highlighted the main purposes of the study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs) and the need for international collaboration. \n\n\n\nOpening Speech \n\n\n\n50 minutes talk \n\n\n\nProf. Dr. Eric Achterberg \n\n\n\nInternational GEOTRACES Programme: Observations across ocean gradients provide insights into biogeochemical cycles \n\n\n\nExperimental work in laboratories and at sea provides important detail on biogeochemical processes and (micro)-nutrient limitation of ocean productivity. Whilst forcing variables can be carefully manipulated in bottle and mesocosm experiments\, artefacts may occur due to exclusion of parts of plankton communities\, contamination and/or ´bottle´ effects. Biogeochemical process observations across biogeochemical gradients as part of section cruises form an elegant alternative. In this talk\, I will present examples of how cruises linked to the SOLAS and GEOTRACES programmes are providing excellent platforms for observations of changes in biogeochemical processes as a consequence of strong geochemical gradients. I will present geochemical gradients related to volcanic\, dust\, glacier and river inputs and their impacts on ocean biology. I will explore variations in nitrogen fixation\, (micro)-nutrient limitation of microbial communities\, and iron cycling related to changes in supply of (micro)-nutrients and oxygen. \n\n\n\nThe improved process understanding and quantification can be used for projections of biogeochemical processes in a future ocean. \n\n\n\nAbout 20 minutes – questions and discussion after the presentation. \n\n\n\nLunch \n\n\n\nRound Table \n\n\n\nAbout two hours. \n\n\n\nA very useful discussion on the TEIs clean sampling systems and analyses was organized after the seminar by Prof. Dr. Eric Achterberg (SSC member)\, PhD Marina Kravchishina (SSC member) and Dr. Ludmila Demina (Past SSC member). About 10 people took part in the discussion that interested in TEIs studying in seawater. \n\n\n\n  URL:https://www.geotraces.org/event/2nd-russian-geotraces-seminar/ LOCATION:Shirshov Institute of Oceanology\, Russian Academy of Sciences\, Moscow\, Russian Federation CATEGORIES:GEOTRACES Scientific Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200216 DTEND;VALUE=DATE:20200222 DTSTAMP:20260405T222447 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:20200312 DTEND;VALUE=DATE:20200314 DTSTAMP:20260405T222447 CREATED:20200306T135241Z LAST-MODIFIED:20210726T121645Z UID:5841-1583971200-1584143999@www.geotraces.org SUMMARY:French GEOTRACES SWINGS (GS02) pre-cruise meeting DESCRIPTION:SWINGS is a multidisciplinary 4-year project fully dedicated to elucidate trace element sources\, transformations and sinks along a section crossing key areas of the Southern Ocean (SO). SWINGS aims at 1) establishing the relative importance of sedimentary\, atmospheric and hydrothermal sources of trace elements and isotopes (TEIs) in the Indian sector of the SO\, 2) investigating the drivers of the internal trace element cycles: biogenic uptake\, remineralization\, particle fate\, and export\, and 3) quantifying TEI transport by the Antarctic Circumpolar Current and the complex frontal areas at the confluence between Indian and Atlantic Oceans. Learn more about the project here. \n\n\n\nAgenda \n\n\n\nThe agenda of the pre-cruise meeting is available to download here. URL:https://www.geotraces.org/event/french-geotraces-swings-gs02-pre-cruise-meeting/ LOCATION:Pôle Numérique Brest Iroise (PNBI)\, 305 Avenue Alexis de Rochon\, Plouzané\, France CATEGORIES:GEOTRACES Cruise Workshops END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200316 DTEND;VALUE=DATE:20200321 DTSTAMP:20260405T222447 CREATED:20191010T082208Z LAST-MODIFIED:20210726T123142Z UID:3280-1584316800-1584748799@www.geotraces.org SUMMARY:International Indian Ocean Science Conference (IIOSC-2020) DESCRIPTION: URL:https://www.geotraces.org/event/international-indian-ocean-science-conference-iiosc-2020/ LOCATION:CSIR-National Institute of Oceanography (NIO)\, Goa\, India CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200330 DTEND;VALUE=DATE:20200404 DTSTAMP:20260405T222447 CREATED:20191010T082551Z LAST-MODIFIED:20210726T121725Z UID:3283-1585526400-1585958399@www.geotraces.org SUMMARY:Climate Change in the Asia-Pacific Region\, From Environmental aspects to socio-economic impacts DESCRIPTION:The International Conference on “Climate Change in the Asia-Pacific Region\, From Environmental aspects to socio-economic impacts” will be organized by IRD\, USTH and Rencontres du Vietnam from March 30 to April 3\, 2020 at ICISE in Quy Nhon\, VIETNAM. \n\n\n\nThe components of the regional socio-environmental system are strongly interconnected\, the conference will therefore focus on interdisciplinary studies\, aiming to regroup specialists from all of the disciplines involved in the study of climate change impacts. \n\n\n\nFinancial support will be available for young scientists and scientists from emerging countries. \n\n\n\nPlease check our flyer and visit the conference website at: www.icisequynhon.com/conferences/2020/climate-change \n\n\n\nThe deadline for abstract submission is December 1st 2019. URL:https://www.geotraces.org/event/climate-change-in-the-asia-pacific-region-from-environmental-aspects-to-socio-economic-impacts/ LOCATION:The International Centre for Interdisciplinary Science Education (ICISE)\, Quy Nhon\, Viet Nam CATEGORIES:Other Conferences of Interest END:VEVENT BEGIN:VEVENT DTSTART;VALUE=DATE:20200504 DTEND;VALUE=DATE:20200510 DTSTAMP:20260405T222447 CREATED:20191115T144400Z LAST-MODIFIED:20210726T122026Z UID:4222-1588550400-1589068799@www.geotraces.org SUMMARY:European Geosciences Union General Assembly 2020 (EGU2020) DESCRIPTION:European Geosciences Union General Assembly 2020 (EGU2020) \n\n\n\nThe physical EGU General Assembly 2020 in Vienna\, Austria\, has been cancelled.  To minimise the impact\, EGU has decided to host an EGU2020: Sharing Geoscience Online meeting.For further information: https://www.egu2020.eu/ \n\n\n\nGEOTRACES-related sessions:\n\n\n\nThe list below shows GEOTRACES-related sessions submitted to the physical EGU2020 which has been cancelled. Please check the EGU2020 web site to find the most updated information on the activities and sessions organised by EGU2020 ONLINE meeting. \n\n\n\n*OS3.3 Mercury and persistent organic pollutants in the oceanDonata Melaku Canu\, Javier Castro Jimenez\, Lars-Eric Heimbürger-Boavida\, Mario Sprovieri \n\n\n\nhttps://meetingorganizer.copernicus.org/EGU2020/session/36166 \n\n\n\nWe welcome contributions focusing on observations\, experiments\, and modelling of the mercury (Hg) and POP (persistent organic pollutants) cycles in the estuarine\, coastal and ocean environments. Other compartments of the earth system\, and related societal\, ecosystem and human health impact studies are welcome as well. Combined mercury and POPs as well as coupled observation and modelling approaches are especially welcome. The main objectives of this special session are to further the understanding of the sources and fluxes; the quantification and assessment of the processes; mechanisms driving transfer through the marine trophic web; biogeochemical modeling; effects of climate change and changed emissions scenarios; scenarios of mitigation and adaptation to mercury and POP’s pollution\, and impacts on society\, ecosystem and human health. \n\n\n\n*OS3.6 Impacts of anthropogenic pollution on ocean biogeochemistryCamille Richon\, Lars-Eric Heimbürger-Boavida\, Charlotte Laufkötter\, Susan Little \n\n\n\nhttps://meetingorganizer.copernicus.org/EGU2020/session/36174 \n\n\n\nMarine anthropogenic pollution is increasingly recognized as a serious issue of global concern with substantial risks for marine ecosystems\, fisheries\, and food supply to people. Plastic and chemical contaminants are spread on a planetary scale\, and may have devastating impacts on marine ecosystems. Yet\, they remain poorly studied and much is yet to learn about how plastic and chemical contamination impacts marine nutrient cycles and the lower food chain. In this session\, we invite contributions from experimentalists and modellers trying to understand the impacts of plastics as well as chemical contaminants on the biogeochemistry of the oceans. The objective of this session is to share the current research on how the multiple sources of anthropogenic pollution impact marine biogeochemical cycles\, such as pollutant leaching from plastics\, plastic ingestion by marine animals\, and direct contamination of the water by contaminated rivers\, aerosols\, or submarine groundwater. The session would welcome all techniques\, including direct measurements of contaminant fluxes\, isotopic or other approaches to tracing contamination\, modelling\, experimental incubations with contaminants\, mesocosm studies and toxicity assessments. We particularly encourage contributions regarding the quantification of sources and fluxes of contaminants to the marine environment\, and the effects of this contamination (toxicity from chemical contaminants such as heavy metals or PCBs\, effects of plastic ingestion on zooplankton…). \n\n\n\n*BG1.5 Mercury cycling in the environment – sources\, processes\, impacts\, and archives from local to global scalesan G. Wiederhold\, Sofi Jonsson\, Martin Jiskra\, Sophia Hansson \n\n\n\nhttps://meetingorganizer.copernicus.org/EGU2020/session/35204 \n\n\n\nMercury (Hg) is a toxic global pollutant of great environmental concern. The UNEP Minamata convention on mercury\, a legally-binding international treaty aiming to reduce negative impacts of Hg on the environment\, has entered into force in 2017. Anthropogenic activities have altered the global Hg cycle to a great extent and many ecosystems are threatened by exposure to elevated levels of Hg and its different species. For instance\, neurotoxic and bioaccumulating methyl-Hg is formed under the influence of anaerobic microorganisms in a variety of natural systems but the controls on this key process are still far from being understood. Further active Hg research areas include exchange processes at the atmosphere-soil-plant interface and their importance for understanding atmospheric Hg deposition\, the behavior and long-term fate of Hg at contaminated sites\, as well as global cycling models assessing the evolution of historic Hg fluxes from different natural and anthropogenic sources. In the past few years\, a number of novel research tools based on microbiological\, spectroscopic\, isotopic\, and modelling techniques have been developed to improve our understanding of Hg cycling in the environment. This session presents new contributions on present-day Hg cycling in the environment using field-based\, experimental\, and/or modelling approaches on local to global scales\, as well as contributions focusing on long- and short-term reconstruction of Hg as a pollutant over time using natural archives such as ice-cores\, tree-rings\, lake sediments and peat bogs. We particularly welcome research addressing the effects of the implementation of the Minamata convention on mercury levels in the environment and new approaches to assess its effectiveness. \n\n\n\n*BG4.5 The impact of anthropogenic sediment reworking on the seafloorSebastiaan van de Velde\, Pere Masqué and Sarah Paradis \n\n\n\nhttps://meetingorganizer.copernicus.org/EGU2020/session/35228 \n\n\n\nThe human imprint on the marine realm has rapidly increased during the last century\, leaving no area unaffected by human activities. Bottom trawl fishing intensity has boomed since the 1950s\, while at the same time dredging activities in coastal zones have intensified to maintain navigable waterways\, reclaim land\, construct wind farms or counteract coastal erosion. Off-shore drilling platforms have been constructed around the world\, and more recently\, deep-sea mining has become an attractive avenue for mineral extraction. All of these economic activities physically perturb the seabed\, and are expected to have a strong effect on the natural biological\, geochemical and physical dynamics of the ocean. However\, very little is understood about the short-term and long-term impact of these anthropogenic physical disturbances. \n\n\n\nThis session aims to create a multidisciplinary discussion on the impact and potential remediation of diverse anthropogenic alterations on the seafloor\, and invites contributions ranging from marine ecology over physical oceanography and biogeochemistry\, be it observational\, theoretical or experimental. \n\n\n\n*CL5.4 Challenges and opportunities arising from palaeo-data compilationsNikita Kaushal\, Laia Comas-Bru\, Franziska Lechleitner and Sophie Warken \n\n\n\nhttps://meetingorganizer.copernicus.org/EGU2020/session/36725 \n\n\n\nThe number of past climatic and/or ecological data generated from a range of distinct proxies and natural archives is continuously growing. Hence\, significant advances in palaeoclimate research can now be made using large-scale compilations. Establishing such large-scale databases reveal supra-regional and global spatial and temporal patterns in palaeoclimate conditions that are not possible with single records. This session aims at presenting current advances in palaeoclimate and palaeoecology based on local- to global-scale syntheses. Bringing together palaeoclimate databases with observational and/or climate modelling outputs is crucial for improving our understanding of past climate conditions\, to identify signal and noise components and their temporal dynamics\, and to gain insight into the quality of data-model comparisons. We therefore aim at bridging the gap between data generation\, earth system modeling and data assimilation studies. We encourage submissions on data compilations\, cross-comparison and modelling studies utilizing data repositories and databases (e.g.\, NEOTOMA\, SISAL\, PAGES2k\, ACER\, EPD). URL:https://www.geotraces.org/event/european-geosciences-union-general-assembly-2020-egu2020/ LOCATION:ONLINE\, VA CATEGORIES:Other Conferences of Interest END:VEVENT END:VCALENDAR