Supplementary material from "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...
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ftdatacite:10.6084/m9.figshare.c.3491604.v1 2023-05-15T15:08:41+02:00 Supplementary material from "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. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi 2016 https://dx.doi.org/10.6084/m9.figshare.c.3491604.v1 https://figshare.com/collections/Supplementary_material_from_Coastal_ocean_and_shelf-sea_biogeochemical_cycling_of_trace_elements_and_isotopes_lessons_learned_from_GEOTRACES_/3491604/1 unknown Figshare https://dx.doi.org/10.1098/rsta.2016.0076 https://dx.doi.org/10.6084/m9.figshare.c.3491604 CC-BY https://creativecommons.org/licenses/by/4.0 CC-BY Geochemistry FOS Earth and related environmental sciences Oceanography Collection article 2016 ftdatacite https://doi.org/10.6084/m9.figshare.c.3491604.v1 https://doi.org/10.1098/rsta.2016.0076 https://doi.org/10.6084/m9.figshare.c.3491604 2021-11-05T12:55:41Z 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 ( T 1/2 = 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. Article in Journal/Newspaper Arctic North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Arctic |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geochemistry FOS Earth and related environmental sciences Oceanography |
spellingShingle |
Geochemistry FOS Earth and related environmental sciences 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. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi Supplementary material from "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES" |
topic_facet |
Geochemistry FOS Earth and related environmental sciences 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 ( T 1/2 = 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. |
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. Homoky, William B. Milne, Angela Thomas, Helmuth Andersson, Per S. Porcelli, Don Tanaka, Takahiro Geibert, Walter Dehairs, Frank Garcia-Orellana, Jordi |
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. 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 |
Supplementary material from "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES" |
title_short |
Supplementary material from "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES" |
title_full |
Supplementary material from "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES" |
title_fullStr |
Supplementary material from "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES" |
title_full_unstemmed |
Supplementary material from "Coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from GEOTRACES" |
title_sort |
supplementary material from "coastal ocean and shelf-sea biogeochemical cycling of trace elements and isotopes: lessons learned from geotraces" |
publisher |
Figshare |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.3491604.v1 https://figshare.com/collections/Supplementary_material_from_Coastal_ocean_and_shelf-sea_biogeochemical_cycling_of_trace_elements_and_isotopes_lessons_learned_from_GEOTRACES_/3491604/1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_relation |
https://dx.doi.org/10.1098/rsta.2016.0076 https://dx.doi.org/10.6084/m9.figshare.c.3491604 |
op_rights |
CC-BY https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.3491604.v1 https://doi.org/10.1098/rsta.2016.0076 https://doi.org/10.6084/m9.figshare.c.3491604 |
_version_ |
1766340001265614848 |