Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES.
Identifieur interne : 001537 ( PubMed/Curation ); précédent : 001536; suivant : 001538Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES.
Auteurs : Matthew A. Charette [États-Unis] ; Phoebe J. Lam [États-Unis] ; Maeve C. Lohan [Royaume-Uni] ; Eun Young Kwon [Corée du Sud] ; Vanessa Hatje [Brésil] ; Catherine Jeandel [France] ; Alan M. Shiller [États-Unis] ; Gregory A. Cutter [États-Unis] ; Alex Thomas [Royaume-Uni] ; Philip W. Boyd [Australie] ; William B. Homoky [Royaume-Uni] ; Angela Milne [Royaume-Uni] ; Helmuth Thomas [Canada] ; Per S. Andersson [Suède] ; Don Porcelli [Royaume-Uni] ; Takahiro Tanaka [Japon] ; Walter Geibert [Allemagne] ; Frank Dehairs [Belgique] ; Jordi Garcia-Orellana [Espagne]Source :
- Philosophical transactions. Series A, Mathematical, physical, and engineering sciences [ 1471-2962 ] ; 2016.
Abstract
Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf (228)Ra fluxes are combined with TEI/ (228)Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3-23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.
DOI: 10.1098/rsta.2016.0076
PubMed: 29035267
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<author><name sortKey="Thomas, Alex" sort="Thomas, Alex" uniqKey="Thomas A" first="Alex" last="Thomas">Alex Thomas</name>
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<author><name sortKey="Boyd, Philip W" sort="Boyd, Philip W" uniqKey="Boyd P" first="Philip W" last="Boyd">Philip W. Boyd</name>
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<author><name sortKey="Andersson, Per S" sort="Andersson, Per S" uniqKey="Andersson P" first="Per S" last="Andersson">Per S. Andersson</name>
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<author><name sortKey="Porcelli, Don" sort="Porcelli, Don" uniqKey="Porcelli D" first="Don" last="Porcelli">Don Porcelli</name>
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<author><name sortKey="Garcia Orellana, Jordi" sort="Garcia Orellana, Jordi" uniqKey="Garcia Orellana J" first="Jordi" last="Garcia-Orellana">Jordi Garcia-Orellana</name>
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<front><div type="abstract" xml:lang="en">Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf (228)Ra fluxes are combined with TEI/ (228)Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3-23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.</div>
</front>
</TEI>
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<ELocationID EIdType="pii" ValidYN="Y">20160076</ELocationID>
<ELocationID EIdType="doi" ValidYN="Y">10.1098/rsta.2016.0076</ELocationID>
<Abstract><AbstractText>Continental shelves and shelf seas play a central role in the global carbon cycle. However, their importance with respect to trace element and isotope (TEI) inputs to ocean basins is less well understood. Here, we present major findings on shelf TEI biogeochemistry from the GEOTRACES programme as well as a proof of concept for a new method to estimate shelf TEI fluxes. The case studies focus on advances in our understanding of TEI cycling in the Arctic, transformations within a major river estuary (Amazon), shelf sediment micronutrient fluxes and basin-scale estimates of submarine groundwater discharge. The proposed shelf flux tracer is 228-radium (T1/2 = 5.75 yr), which is continuously supplied to the shelf from coastal aquifers, sediment porewater exchange and rivers. Model-derived shelf (228)Ra fluxes are combined with TEI/ (228)Ra ratios to quantify ocean TEI fluxes from the western North Atlantic margin. The results from this new approach agree well with previous estimates for shelf Co, Fe, Mn and Zn inputs and exceed published estimates of atmospheric deposition by factors of approximately 3-23. Lastly, recommendations are made for additional GEOTRACES process studies and coastal margin-focused section cruises that will help refine the model and provide better insight on the mechanisms driving shelf-derived TEI fluxes to the ocean.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.</AbstractText>
<CopyrightInformation>© 2015 The Authors.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Charette</LastName>
<ForeName>Matthew A</ForeName>
<Initials>MA</Initials>
<Identifier Source="ORCID">http://orcid.org/0000-0003-3699-592X</Identifier>
<AffiliationInfo><Affiliation>Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA mcharette@whoi.edu.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Lam</LastName>
<ForeName>Phoebe J</ForeName>
<Initials>PJ</Initials>
<AffiliationInfo><Affiliation>Department of Ocean Sciences, University of California-Santa Cruz, Santa Cruz, CA 95064, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Lohan</LastName>
<ForeName>Maeve C</ForeName>
<Initials>MC</Initials>
<AffiliationInfo><Affiliation>Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, UK.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Kwon</LastName>
<ForeName>Eun Young</ForeName>
<Initials>EY</Initials>
<AffiliationInfo><Affiliation>Research Institute of Oceanography, Seoul National University, Seoul 151-742, Korea.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Hatje</LastName>
<ForeName>Vanessa</ForeName>
<Initials>V</Initials>
<AffiliationInfo><Affiliation>Centro Interdisciplinar de Energia e Ambiente, Inst. de Química, Universidade Federal da Bahia, Salvador 40170-115, Brazil.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Jeandel</LastName>
<ForeName>Catherine</ForeName>
<Initials>C</Initials>
<Identifier Source="ORCID">http://orcid.org/0000-0002-4915-4719</Identifier>
<AffiliationInfo><Affiliation>University of Toulouse/CNRS/UPS/IRD/CNES, Observatoire Midi-Pyrénées, Toulouse 31400, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Shiller</LastName>
<ForeName>Alan M</ForeName>
<Initials>AM</Initials>
<AffiliationInfo><Affiliation>Department of Marine Science, University of Southern Mississippi, Stennis Space Center, MS 39529, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Cutter</LastName>
<ForeName>Gregory A</ForeName>
<Initials>GA</Initials>
<AffiliationInfo><Affiliation>Department of Ocean, Earth, and Atmospheric Sciences, Old Dominion University, Norfolk, VA 23529, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Thomas</LastName>
<ForeName>Alex</ForeName>
<Initials>A</Initials>
<AffiliationInfo><Affiliation>School of GeoSciences, University of Edinburgh, Edinburgh EH9 3FE, UK.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Boyd</LastName>
<ForeName>Philip W</ForeName>
<Initials>PW</Initials>
<Identifier Source="ORCID">http://orcid.org/0000-0001-7850-1911</Identifier>
<AffiliationInfo><Affiliation>Institute of Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania 7005, Australia.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Homoky</LastName>
<ForeName>William B</ForeName>
<Initials>WB</Initials>
<Identifier Source="ORCID">http://orcid.org/0000-0002-9562-8591</Identifier>
<AffiliationInfo><Affiliation>Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Milne</LastName>
<ForeName>Angela</ForeName>
<Initials>A</Initials>
<AffiliationInfo><Affiliation>School of Geography, Earth and Environmental Sciences, Plymouth University, Plymouth PL4 8AA, UK.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Thomas</LastName>
<ForeName>Helmuth</ForeName>
<Initials>H</Initials>
<AffiliationInfo><Affiliation>Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4R2.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Andersson</LastName>
<ForeName>Per S</ForeName>
<Initials>PS</Initials>
<AffiliationInfo><Affiliation>Department of Geosciences, Swedish Museum of Natural History, Stockholm 104 05, Sweden.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Porcelli</LastName>
<ForeName>Don</ForeName>
<Initials>D</Initials>
<AffiliationInfo><Affiliation>Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK.</Affiliation>
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</Author>
<Author ValidYN="Y"><LastName>Tanaka</LastName>
<ForeName>Takahiro</ForeName>
<Initials>T</Initials>
<AffiliationInfo><Affiliation>Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa Chiba 277-8564, Japan.</Affiliation>
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<Initials>W</Initials>
<AffiliationInfo><Affiliation>Marine Geochemistry Department, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany.</Affiliation>
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<Initials>J</Initials>
<AffiliationInfo><Affiliation>Physics Department-ICTA, Universitat Autònoma de Barcelona, Barcelona 08193, Spain.</Affiliation>
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</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D016454">Review</PublicationType>
</PublicationTypeList>
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<MedlineTA>Philos Trans A Math Phys Eng Sci</MedlineTA>
<NlmUniqueID>101133385</NlmUniqueID>
<ISSNLinking>1364-503X</ISSNLinking>
</MedlineJournalInfo>
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<KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">GEOTRACES</Keyword>
<Keyword MajorTopicYN="N">continental shelf</Keyword>
<Keyword MajorTopicYN="N">isotopes</Keyword>
<Keyword MajorTopicYN="N">radium</Keyword>
<Keyword MajorTopicYN="N">trace elements</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData><History><PubMedPubDate PubStatus="accepted"><Year>2016</Year>
<Month>06</Month>
<Day>30</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez"><Year>2017</Year>
<Month>10</Month>
<Day>17</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed"><Year>2017</Year>
<Month>10</Month>
<Day>17</Day>
<Hour>6</Hour>
<Minute>0</Minute>
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<PubMedPubDate PubStatus="medline"><Year>2017</Year>
<Month>10</Month>
<Day>17</Day>
<Hour>6</Hour>
<Minute>0</Minute>
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</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList><ArticleId IdType="pubmed">29035267</ArticleId>
<ArticleId IdType="pii">rsta.2016.0076</ArticleId>
<ArticleId IdType="doi">10.1098/rsta.2016.0076</ArticleId>
<ArticleId IdType="pmc">PMC5069537</ArticleId>
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