The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa
International audience The spatial distribution, biogeochemical cycle and external sources of dissolved cobalt (DCo) were investigated in the southeastern Atlantic and the Southern Ocean between 33°58′S and 57°33′S along the Greenwich Meridian during the austral summer 2008 in the framework of the I...
Published in: | Marine Chemistry |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Subjects: | |
Online Access: | https://doi.org/10.1016/j.marchem.2011.03.008 https://hal.archives-ouvertes.fr/hal-02345554 |
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openpolar |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
GEOTRACES International Polar Year Dissolved cobalt Southeastern Atlantic Southern Ocean envir geo |
spellingShingle |
GEOTRACES International Polar Year Dissolved cobalt Southeastern Atlantic Southern Ocean envir geo Bown, Johann Boye, Marie Baker, Alexander Duvieilbourg, Eric Lacan, Francois Le Moigne, Frédéric A.C. Planchon, Frédéric Speich, Sabrina Nelson, David The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa |
topic_facet |
GEOTRACES International Polar Year Dissolved cobalt Southeastern Atlantic Southern Ocean envir geo |
description |
International audience The spatial distribution, biogeochemical cycle and external sources of dissolved cobalt (DCo) were investigated in the southeastern Atlantic and the Southern Ocean between 33°58′S and 57°33′S along the Greenwich Meridian during the austral summer 2008 in the framework of the International Polar Year. DCo concentrations were measured by flow-injection analysis and chemiluminescence detection in filtered (0.2 μm), acidified and UV-digested samples at 12 deep stations in order to resolve the several biogeochemical provinces of the Antarctic Circumpolar Current and to assess the vertical and frontal structures in the Atlantic sector of the Southern Ocean. We measured DCo ranging from 5.73 ± 1.15 pM to 72.9 ± 4.51 pM. The distribution of DCo was nutrient-like in surface waters of the subtropical domain with low concentrations in the euphotic layer due to biological uptake. The biological utilization of dissolved cobalt was proportional to that of phosphate in the subtropical domain with a DCo:HPO42− depletion ratio of ~ 44 μM M−1. In deeper waters the distribution indicated remineralization of DCo and inputs from the margins of South Africa with lateral advection of enriched intermediate and deep waters to the southeastern Atlantic Ocean. In contrast the vertical distribution of DCo changed southward, from a nutrient-like distribution in the subtropical domain to scavenged-type behavior in the domain of the Antarctic Circumpolar Current and conservative distribution in the Weddell Gyre. There the cycle of DCo featured low biological removal by Antarctic diatoms with input to surface waters by snow, removal in oxygenated surface waters, and dissolution and stabilization in the low-oxygenated Upper Circumpolar Deep Waters. DCo distributions and physical hydro-dynamics features also suggest inputs from the Drake Passage and the southwestern Atlantic to the 0° meridian along the eastward flow of the Antarctic Circumpolar Current. Bottom enrichment of DCo in the Antarctic Bottom Waters was also ... |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) ANR-07-BLAN-0146,BONUS-GOODHOPE(2007) |
format |
Article in Journal/Newspaper |
author |
Bown, Johann Boye, Marie Baker, Alexander Duvieilbourg, Eric Lacan, Francois Le Moigne, Frédéric A.C. Planchon, Frédéric Speich, Sabrina Nelson, David |
author_facet |
Bown, Johann Boye, Marie Baker, Alexander Duvieilbourg, Eric Lacan, Francois Le Moigne, Frédéric A.C. Planchon, Frédéric Speich, Sabrina Nelson, David |
author_sort |
Bown, Johann |
title |
The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa |
title_short |
The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa |
title_full |
The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa |
title_fullStr |
The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa |
title_full_unstemmed |
The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa |
title_sort |
biogeochemical cycle of dissolved cobalt in the atlantic and the southern ocean south off the coast of south africa |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://doi.org/10.1016/j.marchem.2011.03.008 https://hal.archives-ouvertes.fr/hal-02345554 |
geographic |
Antarctic Austral Drake Passage Greenwich Southern Ocean The Antarctic Weddell |
geographic_facet |
Antarctic Austral Drake Passage Greenwich Southern Ocean The Antarctic Weddell |
genre |
Antarc* Antarctic Drake Passage International Polar Year Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage International Polar Year Southern Ocean |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0304-4203 Marine Chemistry Marine Chemistry, Elsevier, 2011, 126 (1-4), pp.193-206. ⟨10.1016/j.marchem.2011.03.008⟩ |
op_relation |
hal-02345554 doi:10.1016/j.marchem.2011.03.008 10670/1.owclmc https://hal.archives-ouvertes.fr/hal-02345554 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1016/j.marchem.2011.03.008 |
container_title |
Marine Chemistry |
container_volume |
126 |
container_issue |
1-4 |
container_start_page |
193 |
op_container_end_page |
206 |
_version_ |
1766272652123570176 |
spelling |
fttriple:oai:gotriple.eu:10670/1.owclmc 2023-05-15T14:02:23+02:00 The biogeochemical cycle of dissolved cobalt in the Atlantic and the Southern Ocean south off the coast of South Africa Bown, Johann Boye, Marie Baker, Alexander Duvieilbourg, Eric Lacan, Francois Le Moigne, Frédéric A.C. Planchon, Frédéric Speich, Sabrina Nelson, David Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO) School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) ANR-07-BLAN-0146,BONUS-GOODHOPE(2007) 2011-09-01 https://doi.org/10.1016/j.marchem.2011.03.008 https://hal.archives-ouvertes.fr/hal-02345554 en eng HAL CCSD Elsevier hal-02345554 doi:10.1016/j.marchem.2011.03.008 10670/1.owclmc https://hal.archives-ouvertes.fr/hal-02345554 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0304-4203 Marine Chemistry Marine Chemistry, Elsevier, 2011, 126 (1-4), pp.193-206. ⟨10.1016/j.marchem.2011.03.008⟩ GEOTRACES International Polar Year Dissolved cobalt Southeastern Atlantic Southern Ocean envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.1016/j.marchem.2011.03.008 2023-01-22T17:43:47Z International audience The spatial distribution, biogeochemical cycle and external sources of dissolved cobalt (DCo) were investigated in the southeastern Atlantic and the Southern Ocean between 33°58′S and 57°33′S along the Greenwich Meridian during the austral summer 2008 in the framework of the International Polar Year. DCo concentrations were measured by flow-injection analysis and chemiluminescence detection in filtered (0.2 μm), acidified and UV-digested samples at 12 deep stations in order to resolve the several biogeochemical provinces of the Antarctic Circumpolar Current and to assess the vertical and frontal structures in the Atlantic sector of the Southern Ocean. We measured DCo ranging from 5.73 ± 1.15 pM to 72.9 ± 4.51 pM. The distribution of DCo was nutrient-like in surface waters of the subtropical domain with low concentrations in the euphotic layer due to biological uptake. The biological utilization of dissolved cobalt was proportional to that of phosphate in the subtropical domain with a DCo:HPO42− depletion ratio of ~ 44 μM M−1. In deeper waters the distribution indicated remineralization of DCo and inputs from the margins of South Africa with lateral advection of enriched intermediate and deep waters to the southeastern Atlantic Ocean. In contrast the vertical distribution of DCo changed southward, from a nutrient-like distribution in the subtropical domain to scavenged-type behavior in the domain of the Antarctic Circumpolar Current and conservative distribution in the Weddell Gyre. There the cycle of DCo featured low biological removal by Antarctic diatoms with input to surface waters by snow, removal in oxygenated surface waters, and dissolution and stabilization in the low-oxygenated Upper Circumpolar Deep Waters. DCo distributions and physical hydro-dynamics features also suggest inputs from the Drake Passage and the southwestern Atlantic to the 0° meridian along the eastward flow of the Antarctic Circumpolar Current. Bottom enrichment of DCo in the Antarctic Bottom Waters was also ... Article in Journal/Newspaper Antarc* Antarctic Drake Passage International Polar Year Southern Ocean Unknown Antarctic Austral Drake Passage Greenwich Southern Ocean The Antarctic Weddell Marine Chemistry 126 1-4 193 206 |