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 program as well...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Royal Society
2016
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Online Access: | https://epic.awi.de/id/eprint/41334/ https://epic.awi.de/id/eprint/41334/1/RoyalSocietyShelfGEOTRACESrevisedfinal.pdf https://hdl.handle.net/10013/epic.48735 https://hdl.handle.net/10013/epic.48735.d001 |
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ftawi:oai:epic.awi.de:41334 2023-05-15T15:07:08+02:00 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 L. Boyd, Philip W. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi 2016 application/pdf https://epic.awi.de/id/eprint/41334/ https://epic.awi.de/id/eprint/41334/1/RoyalSocietyShelfGEOTRACESrevisedfinal.pdf https://hdl.handle.net/10013/epic.48735 https://hdl.handle.net/10013/epic.48735.d001 unknown Royal Society https://epic.awi.de/id/eprint/41334/1/RoyalSocietyShelfGEOTRACESrevisedfinal.pdf https://hdl.handle.net/10013/epic.48735.d001 Charette, M. A. , Lam, P. J. , Lohan, M. C. , Kwon, E. Y. , Hatje, V. , Jeandel, C. , Shiller, A. M. , Cutter, G. A. , Thomas, A. L. , Boyd, P. W. , Homoky, W. B. , Milne, A. , Thomas, H. , Andersson, P. S. , Porcelli, D. , Tanaka, T. , Geibert, W. orcid:0000-0001-8646-2334 , Dehairs, F. and Garcia-Orellana, J. (2016) Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES , Philosophical Transactions A . doi:10.1098/rsta.2016.0076 <https://doi.org/10.1098/rsta.2016.0076> , hdl:10013/epic.48735 EPIC3Philosophical Transactions A, Royal Society Article isiRev 2016 ftawi https://doi.org/10.1098/rsta.2016.0076 2021-12-24T15:41:46Z 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 program 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 y), 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 ~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. Article in Journal/Newspaper Arctic North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374 2081 20160076 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 program 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 y), 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 ~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. |
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 L. Boyd, Philip W. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi |
spellingShingle |
Charette, Matthew A. Lam, Phoebe J. Lohan, Maeve C. Kwon, Eun Young Hatje, Vanessa Jeandel, Catherine Shiller, Alan M. Cutter, Gregory A. Thomas, Alex L. Boyd, Philip W. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES |
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 L. Boyd, Philip W. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi |
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 |
Royal Society |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41334/ https://epic.awi.de/id/eprint/41334/1/RoyalSocietyShelfGEOTRACESrevisedfinal.pdf https://hdl.handle.net/10013/epic.48735 https://hdl.handle.net/10013/epic.48735.d001 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
EPIC3Philosophical Transactions A, Royal Society |
op_relation |
https://epic.awi.de/id/eprint/41334/1/RoyalSocietyShelfGEOTRACESrevisedfinal.pdf https://hdl.handle.net/10013/epic.48735.d001 Charette, M. A. , Lam, P. J. , Lohan, M. C. , Kwon, E. Y. , Hatje, V. , Jeandel, C. , Shiller, A. M. , Cutter, G. A. , Thomas, A. L. , Boyd, P. W. , Homoky, W. B. , Milne, A. , Thomas, H. , Andersson, P. S. , Porcelli, D. , Tanaka, T. , Geibert, W. orcid:0000-0001-8646-2334 , Dehairs, F. and Garcia-Orellana, J. (2016) Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES , Philosophical Transactions A . doi:10.1098/rsta.2016.0076 <https://doi.org/10.1098/rsta.2016.0076> , hdl:10013/epic.48735 |
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 |
_version_ |
1766338705811832832 |