Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean
International audience The distributions of the bio-essential trace element dissolved cobalt (DCo) and the apparent particulate Co (PCo) are presented along the GEOTRACES-A02 deep section from 64° N to 50° S in the western Atlantic Ocean (longest section of international GEOTRACES marine environment...
Published in: | Biogeosciences |
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Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.univ-brest.fr/hal-01025179 https://hal.univ-brest.fr/hal-01025179/document https://hal.univ-brest.fr/hal-01025179/file/bg-Dulaquais-2014.pdf https://doi.org/10.5194/bg-11-1561-2014 |
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ftinsu:oai:HAL:hal-01025179v1 |
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openpolar |
institution |
Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
bottom water cobalt concentration (composition) deep sea intermediate water marine environment marine sediment mixing North Atlantic Deep Water oxygenation particulate matter phosphate remineralization scavenging (chemistry) volcanic eruption Atlantic Ocean Atlantic Ocean (West) ACL [SDV]Life Sciences [q-bio] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
bottom water cobalt concentration (composition) deep sea intermediate water marine environment marine sediment mixing North Atlantic Deep Water oxygenation particulate matter phosphate remineralization scavenging (chemistry) volcanic eruption Atlantic Ocean Atlantic Ocean (West) ACL [SDV]Life Sciences [q-bio] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Dulaquais, Gabriel Boye, Marie Rijkenberg, M.J.A Carton, Xavier J. Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean |
topic_facet |
bottom water cobalt concentration (composition) deep sea intermediate water marine environment marine sediment mixing North Atlantic Deep Water oxygenation particulate matter phosphate remineralization scavenging (chemistry) volcanic eruption Atlantic Ocean Atlantic Ocean (West) ACL [SDV]Life Sciences [q-bio] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The distributions of the bio-essential trace element dissolved cobalt (DCo) and the apparent particulate Co (PCo) are presented along the GEOTRACES-A02 deep section from 64° N to 50° S in the western Atlantic Ocean (longest section of international GEOTRACES marine environment program). PCo was determined as the difference between total cobalt (T Co, unfiltered samples) and DCo. DCo concentrations ranged from 14.7pM to 94.3 pM, and PCo concentrations from undetectable values to 18.8 pM. The lowest DCo concentrations were observed in the subtropical domains, and the highest in the low-oxygenated Atlantic Central Waters (ACW), which appears to be the major reservoir of DCo in the western Atlantic. In the Antarctic Bottom Waters, the enrichment in DCo with aging of the water mass can be related to suspension and redissolution of bottom sediments a well as diffusion of DCo from abyssal sediments. Mixing and dilution of deep water masses, rather than scavenging of DCo onto settling particles, generated the meridional decrease of DCo along the southward large-scale circulation in the deep western Atlantic. Furthermore, the apparent scavenged profile of DCo observed in the deep waters likely resulted from the persistence of relatively high concentrations in intermediate waters and low DCo concentrations in underlaying bottom waters. We suggest that the 2010 Icelandic volcanic eruption could have been a source of DCo that could have been transported into the core of the Northeast Atlantic Deep Waters. At intermediate depths, the high concentrations of DCo recorded in the ACW linearly correlated with the apparent utilization of oxygen (AOU), indicating that remineralization of DCo could be significant (representing up to 37% of the DCo present). Furthermore, the preferential remineralization of phosphate (P) compared to Co in these low-oxygenated waters suggests a decoupling between the deep cycles of P and Co. The vertical diffusion of DCo from the ACW appears to be a significant source of DCo ... |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-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)-Centre National de la Recherche Scientifique (CNRS) Department of Marine Chemistry and Geology Royal Netherlands Institute for Sea Research (NIOZ) 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) |
format |
Article in Journal/Newspaper |
author |
Dulaquais, Gabriel Boye, Marie Rijkenberg, M.J.A Carton, Xavier J. |
author_facet |
Dulaquais, Gabriel Boye, Marie Rijkenberg, M.J.A Carton, Xavier J. |
author_sort |
Dulaquais, Gabriel |
title |
Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean |
title_short |
Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean |
title_full |
Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean |
title_fullStr |
Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean |
title_full_unstemmed |
Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean |
title_sort |
physical and remineralization processes govern the cobalt distribution in the deep western atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.univ-brest.fr/hal-01025179 https://hal.univ-brest.fr/hal-01025179/document https://hal.univ-brest.fr/hal-01025179/file/bg-Dulaquais-2014.pdf https://doi.org/10.5194/bg-11-1561-2014 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Northeast Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Northeast Atlantic |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.univ-brest.fr/hal-01025179 Biogeosciences, 2014, 11 (6), pp.1561-1580. ⟨10.5194/bg-11-1561-2014⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-1561-2014 hal-01025179 https://hal.univ-brest.fr/hal-01025179 https://hal.univ-brest.fr/hal-01025179/document https://hal.univ-brest.fr/hal-01025179/file/bg-Dulaquais-2014.pdf doi:10.5194/bg-11-1561-2014 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-11-1561-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
6 |
container_start_page |
1561 |
op_container_end_page |
1580 |
_version_ |
1790593779001982976 |
spelling |
ftinsu:oai:HAL:hal-01025179v1 2024-02-11T09:58:11+01:00 Physical and remineralization processes govern the cobalt distribution in the deep western Atlantic Ocean Dulaquais, Gabriel Boye, Marie Rijkenberg, M.J.A Carton, Xavier J. Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-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)-Centre National de la Recherche Scientifique (CNRS) Department of Marine Chemistry and Geology Royal Netherlands Institute for Sea Research (NIOZ) 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) 2014-03-24 https://hal.univ-brest.fr/hal-01025179 https://hal.univ-brest.fr/hal-01025179/document https://hal.univ-brest.fr/hal-01025179/file/bg-Dulaquais-2014.pdf https://doi.org/10.5194/bg-11-1561-2014 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-1561-2014 hal-01025179 https://hal.univ-brest.fr/hal-01025179 https://hal.univ-brest.fr/hal-01025179/document https://hal.univ-brest.fr/hal-01025179/file/bg-Dulaquais-2014.pdf doi:10.5194/bg-11-1561-2014 info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.univ-brest.fr/hal-01025179 Biogeosciences, 2014, 11 (6), pp.1561-1580. ⟨10.5194/bg-11-1561-2014⟩ bottom water cobalt concentration (composition) deep sea intermediate water marine environment marine sediment mixing North Atlantic Deep Water oxygenation particulate matter phosphate remineralization scavenging (chemistry) volcanic eruption Atlantic Ocean Atlantic Ocean (West) ACL [SDV]Life Sciences [q-bio] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2014 ftinsu https://doi.org/10.5194/bg-11-1561-2014 2024-01-24T17:40:39Z International audience The distributions of the bio-essential trace element dissolved cobalt (DCo) and the apparent particulate Co (PCo) are presented along the GEOTRACES-A02 deep section from 64° N to 50° S in the western Atlantic Ocean (longest section of international GEOTRACES marine environment program). PCo was determined as the difference between total cobalt (T Co, unfiltered samples) and DCo. DCo concentrations ranged from 14.7pM to 94.3 pM, and PCo concentrations from undetectable values to 18.8 pM. The lowest DCo concentrations were observed in the subtropical domains, and the highest in the low-oxygenated Atlantic Central Waters (ACW), which appears to be the major reservoir of DCo in the western Atlantic. In the Antarctic Bottom Waters, the enrichment in DCo with aging of the water mass can be related to suspension and redissolution of bottom sediments a well as diffusion of DCo from abyssal sediments. Mixing and dilution of deep water masses, rather than scavenging of DCo onto settling particles, generated the meridional decrease of DCo along the southward large-scale circulation in the deep western Atlantic. Furthermore, the apparent scavenged profile of DCo observed in the deep waters likely resulted from the persistence of relatively high concentrations in intermediate waters and low DCo concentrations in underlaying bottom waters. We suggest that the 2010 Icelandic volcanic eruption could have been a source of DCo that could have been transported into the core of the Northeast Atlantic Deep Waters. At intermediate depths, the high concentrations of DCo recorded in the ACW linearly correlated with the apparent utilization of oxygen (AOU), indicating that remineralization of DCo could be significant (representing up to 37% of the DCo present). Furthermore, the preferential remineralization of phosphate (P) compared to Co in these low-oxygenated waters suggests a decoupling between the deep cycles of P and Co. The vertical diffusion of DCo from the ACW appears to be a significant source of DCo ... Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic Northeast Atlantic Institut national des sciences de l'Univers: HAL-INSU Antarctic The Antarctic Biogeosciences 11 6 1561 1580 |