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: | http://hdl.handle.net/10026.1/9680 https://doi.org/10.1098/rsta.2016.0076 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/9680 2023-06-11T04:09:41+02:00 Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES Charette, MA Lam, PJ Lohan, MC Kwon, EY Hatje, V Jeandel, C Shiller, AM Cutter, GA Thomas, A Boyd, PW Homoky, WB Milne, Angela Thomas, H Andersson, PS Porcelli, D Tanaka, T Geibert, W Dehairs, F Garcia-Orellana, J 2016-11-28 20160076-20160076 Print application/pdf http://hdl.handle.net/10026.1/9680 https://doi.org/10.1098/rsta.2016.0076 en eng The Royal Society England http://hdl.handle.net/10026.1/8348 10026.1/8348 ISSN:1364-503X ISSN:1471-2962 E-ISSN:1471-2962 1364-503X 1471-2962 ARTN 20160076 http://hdl.handle.net/10026.1/9680 doi:10.1098/rsta.2016.0076 Not known GEOTRACES trace elements isotopes radium continental shelf journal-article Journal Article Review Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2016 ftunivplympearl https://doi.org/10.1098/rsta.2016.0076 2023-05-04T23:07:01Z 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 PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Arctic Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374 2081 20160076 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
GEOTRACES trace elements isotopes radium continental shelf |
spellingShingle |
GEOTRACES trace elements isotopes radium continental shelf Charette, MA Lam, PJ Lohan, MC Kwon, EY Hatje, V Jeandel, C Shiller, AM Cutter, GA Thomas, A Boyd, PW Homoky, WB Milne, Angela Thomas, H Andersson, PS Porcelli, D Tanaka, T Geibert, W Dehairs, F Garcia-Orellana, J Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES |
topic_facet |
GEOTRACES trace elements isotopes radium continental shelf |
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, MA Lam, PJ Lohan, MC Kwon, EY Hatje, V Jeandel, C Shiller, AM Cutter, GA Thomas, A Boyd, PW Homoky, WB Milne, Angela Thomas, H Andersson, PS Porcelli, D Tanaka, T Geibert, W Dehairs, F Garcia-Orellana, J |
author_facet |
Charette, MA Lam, PJ Lohan, MC Kwon, EY Hatje, V Jeandel, C Shiller, AM Cutter, GA Thomas, A Boyd, PW Homoky, WB Milne, Angela Thomas, H Andersson, PS Porcelli, D Tanaka, T Geibert, W Dehairs, F Garcia-Orellana, J |
author_sort |
Charette, MA |
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 |
The Royal Society |
publishDate |
2016 |
url |
http://hdl.handle.net/10026.1/9680 https://doi.org/10.1098/rsta.2016.0076 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_relation |
http://hdl.handle.net/10026.1/8348 10026.1/8348 ISSN:1364-503X ISSN:1471-2962 E-ISSN:1471-2962 1364-503X 1471-2962 ARTN 20160076 http://hdl.handle.net/10026.1/9680 doi:10.1098/rsta.2016.0076 |
op_rights |
Not known |
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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1768383658100523008 |