Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES
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 we...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | https://digitalcommons.odu.edu/oeas_fac_pubs/230 https://doi.org/10.1098/rsta.2016.0076 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1249/viewcontent/rsta20160076_Charette.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1249 2023-12-03T10:18:13+01:00 Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES Charette, Matthew A. Lam, Phoebe J. Lohan, Maeve C. Kwon, Eun Young Hatje, Vanessa Jeandel, Catherine Shiller, Alan M. Cutter, Gregory A. Thomas, Alex Boyd, Philip W. 2016-06-01T07:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/230 https://doi.org/10.1098/rsta.2016.0076 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1249/viewcontent/rsta20160076_Charette.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/230 doi:10.1098/rsta.2016.0076 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1249/viewcontent/rsta20160076_Charette.pdf © 2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ , which permits unrestricted use, provided the original author and source are credited. OES Faculty Publications Geotraces Continental shelf Isotopes Radium Trace elements Biogeochemistry Oceanography article 2016 ftolddominionuni https://doi.org/10.1098/rsta.2016.0076 2023-11-06T19:09:42Z 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 228Ra fluxes are combined with TEI/ 228Ra 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'. Article in Journal/Newspaper Arctic North Atlantic Old Dominion University: ODU Digital Commons Arctic Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374 2081 20160076 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Geotraces Continental shelf Isotopes Radium Trace elements Biogeochemistry Oceanography |
spellingShingle |
Geotraces Continental shelf Isotopes Radium Trace elements Biogeochemistry Oceanography Charette, Matthew A. Lam, Phoebe J. Lohan, Maeve C. Kwon, Eun Young Hatje, Vanessa Jeandel, Catherine Shiller, Alan M. Cutter, Gregory A. Thomas, Alex Boyd, Philip W. Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES |
topic_facet |
Geotraces Continental shelf Isotopes Radium Trace elements Biogeochemistry Oceanography |
description |
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 228Ra fluxes are combined with TEI/ 228Ra 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'. |
format |
Article in Journal/Newspaper |
author |
Charette, Matthew A. Lam, Phoebe J. Lohan, Maeve C. Kwon, Eun Young Hatje, Vanessa Jeandel, Catherine Shiller, Alan M. Cutter, Gregory A. Thomas, Alex Boyd, Philip W. |
author_facet |
Charette, Matthew A. Lam, Phoebe J. Lohan, Maeve C. Kwon, Eun Young Hatje, Vanessa Jeandel, Catherine Shiller, Alan M. Cutter, Gregory A. Thomas, Alex Boyd, Philip W. |
author_sort |
Charette, Matthew A. |
title |
Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES |
title_short |
Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES |
title_full |
Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES |
title_fullStr |
Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES |
title_full_unstemmed |
Coastal Ocean and Shelf-Sea Biogeochemical Cycling of Trace Elements and Isotopes: Lessons Learned from GEOTRACES |
title_sort |
coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from geotraces |
publisher |
ODU Digital Commons |
publishDate |
2016 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/230 https://doi.org/10.1098/rsta.2016.0076 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1249/viewcontent/rsta20160076_Charette.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/230 doi:10.1098/rsta.2016.0076 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1249/viewcontent/rsta20160076_Charette.pdf |
op_rights |
© 2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ , which permits unrestricted use, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1098/rsta.2016.0076 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
374 |
container_issue |
2081 |
container_start_page |
20160076 |
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1784265191491371008 |