Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 28 (2014): 1387–1412, doi:10.1002/2014GB004903. Dissolved cobalt...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7146 2023-05-15T18:28:37+02:00 Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean Dulaquais, Gabriel Boye, Marie Middag, Rob Owens, Stephanie A. Puigcorbe, Viena Buesseler, Ken O. Masqué, Pere Baar, Hein J. W. de Carton, Xavier 2014-12-05 application/pdf application/msword https://hdl.handle.net/1912/7146 en_US eng John Wiley & Sons https://doi.org/10.1002/2014GB004903 Global Biogeochemical Cycles 28 (2014): 1387–1412 https://hdl.handle.net/1912/7146 doi:10.1002/2014GB004903 Global Biogeochemical Cycles 28 (2014): 1387–1412 doi:10.1002/2014GB004903 Cobalt Biogeochemistry Atlantic Ocean Chemical Oceanography GEOTRACES Article 2014 ftwhoas https://doi.org/10.1002/2014GB004903 2022-05-28T22:59:16Z Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 28 (2014): 1387–1412, doi:10.1002/2014GB004903. Dissolved cobalt (DCo; <0.2 µm; 14 to 93 pM) and the apparent particulate cobalt (PCo; >0.2 µm; <1 to 15 pM) were determined in the upper water column (<1000 m) of the western Atlantic Ocean along the GEOTRACES-A02 section (64°N to 50°S). The lowest DCo concentrations, typical of a nutrient-type distribution were observed in surface waters of the subtropical domains. Strong linear relationships between DCo and phosphate (P) as well as meridional gradients of decreasing DCo from high latitudes were characterized and both linked to the Co biological requirement. External sources such as the Amazon and the atmospheric deposition were found to contribute significantly (>10%) to the DCo stock of the mixed layer in the equatorial and north subtropical domains. Biotic and abiotic processes as well as the physical terms involved in the biogeochemical cycle of Co were defined and estimated. This allowed establishing the first global budget of DCo for the upper 100 m in the western Atlantic. The biological DCo uptake flux was the dominant sink along the section, as reflected by the overall nutrient-type behavior of DCo. The regeneration varied widely within the different biogeochemical domains, accounting for 10% of the DCo-uptake rate in the subarctic gyre and for up to 85% in southern subtropical domain. These findings demonstrated that the regeneration is likely the prevailing source of DCo in the surface waters of the western Atlantic, except in the subpolar domains where physically driven sources can sustain the DCo biological requirement. This investigation was supported by the GEOTRACES-GEOSECS revisited in the West Atlantic project coordinated by M. Boye and funded by the French LEFE-CYBER National Program of the ... Article in Journal/Newspaper Subarctic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Global Biogeochemical Cycles 28 12 1387 1412 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Cobalt Biogeochemistry Atlantic Ocean Chemical Oceanography GEOTRACES |
spellingShingle |
Cobalt Biogeochemistry Atlantic Ocean Chemical Oceanography GEOTRACES Dulaquais, Gabriel Boye, Marie Middag, Rob Owens, Stephanie A. Puigcorbe, Viena Buesseler, Ken O. Masqué, Pere Baar, Hein J. W. de Carton, Xavier Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean |
topic_facet |
Cobalt Biogeochemistry Atlantic Ocean Chemical Oceanography GEOTRACES |
description |
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 28 (2014): 1387–1412, doi:10.1002/2014GB004903. Dissolved cobalt (DCo; <0.2 µm; 14 to 93 pM) and the apparent particulate cobalt (PCo; >0.2 µm; <1 to 15 pM) were determined in the upper water column (<1000 m) of the western Atlantic Ocean along the GEOTRACES-A02 section (64°N to 50°S). The lowest DCo concentrations, typical of a nutrient-type distribution were observed in surface waters of the subtropical domains. Strong linear relationships between DCo and phosphate (P) as well as meridional gradients of decreasing DCo from high latitudes were characterized and both linked to the Co biological requirement. External sources such as the Amazon and the atmospheric deposition were found to contribute significantly (>10%) to the DCo stock of the mixed layer in the equatorial and north subtropical domains. Biotic and abiotic processes as well as the physical terms involved in the biogeochemical cycle of Co were defined and estimated. This allowed establishing the first global budget of DCo for the upper 100 m in the western Atlantic. The biological DCo uptake flux was the dominant sink along the section, as reflected by the overall nutrient-type behavior of DCo. The regeneration varied widely within the different biogeochemical domains, accounting for 10% of the DCo-uptake rate in the subarctic gyre and for up to 85% in southern subtropical domain. These findings demonstrated that the regeneration is likely the prevailing source of DCo in the surface waters of the western Atlantic, except in the subpolar domains where physically driven sources can sustain the DCo biological requirement. This investigation was supported by the GEOTRACES-GEOSECS revisited in the West Atlantic project coordinated by M. Boye and funded by the French LEFE-CYBER National Program of the ... |
format |
Article in Journal/Newspaper |
author |
Dulaquais, Gabriel Boye, Marie Middag, Rob Owens, Stephanie A. Puigcorbe, Viena Buesseler, Ken O. Masqué, Pere Baar, Hein J. W. de Carton, Xavier |
author_facet |
Dulaquais, Gabriel Boye, Marie Middag, Rob Owens, Stephanie A. Puigcorbe, Viena Buesseler, Ken O. Masqué, Pere Baar, Hein J. W. de Carton, Xavier |
author_sort |
Dulaquais, Gabriel |
title |
Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean |
title_short |
Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean |
title_full |
Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean |
title_fullStr |
Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean |
title_full_unstemmed |
Contrasting biogeochemical cycles of cobalt in the surface western Atlantic Ocean |
title_sort |
contrasting biogeochemical cycles of cobalt in the surface western atlantic ocean |
publisher |
John Wiley & Sons |
publishDate |
2014 |
url |
https://hdl.handle.net/1912/7146 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Global Biogeochemical Cycles 28 (2014): 1387–1412 doi:10.1002/2014GB004903 |
op_relation |
https://doi.org/10.1002/2014GB004903 Global Biogeochemical Cycles 28 (2014): 1387–1412 https://hdl.handle.net/1912/7146 doi:10.1002/2014GB004903 |
op_doi |
https://doi.org/10.1002/2014GB004903 |
container_title |
Global Biogeochemical Cycles |
container_volume |
28 |
container_issue |
12 |
container_start_page |
1387 |
op_container_end_page |
1412 |
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1766211160231641088 |