Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector)
International audience During the Kerguelen Ocean and Plateau compared Study (KEOPS; January–February 2005) cruise, the area southeast of the Kerguelen Archipelago in the Indian sector of the Southern Ocean was investigated to identify the mechanisms of natural iron fertilization of the Kerguelen Pl...
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Online Access: | https://hal.univ-brest.fr/hal-00456398 https://doi.org/10.1016/j.dsr2.2007.12.007 |
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ftunivbrest:oai:HAL:hal-00456398v1 2024-02-11T10:08:48+01:00 Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) Gerringa, Loes J.A. Blain, Stéphane Laan, Patrick Sarthou, Géraldine Veldhuis, Marcel Brussaard, Corina Viollier, Eric Timmermans, K.R. Royal Netherlands Institute for Sea Research (NIOZ) Laboratoire d'océanographie et de biogéochimie (LOB) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 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) Laboratoire de géochimie des Eaux (LGE) Université Paris Diderot - Paris 7 (UPD7)-Institut de Physique du Globe de Paris (IPG Paris) 2008-04-07 https://hal.univ-brest.fr/hal-00456398 https://doi.org/10.1016/j.dsr2.2007.12.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2007.12.007 hal-00456398 https://hal.univ-brest.fr/hal-00456398 doi:10.1016/j.dsr2.2007.12.007 ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.univ-brest.fr/hal-00456398 Deep Sea Research Part II: Topical Studies in Oceanography, 2008, 55 (5-7), pp.606-621. ⟨10.1016/j.dsr2.2007.12.007⟩ Iron Organic complexation Natural iron fertilization Southern Ocean Kerguelen Plateau [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2008 ftunivbrest https://doi.org/10.1016/j.dsr2.2007.12.007 2024-01-23T23:37:03Z International audience During the Kerguelen Ocean and Plateau compared Study (KEOPS; January–February 2005) cruise, the area southeast of the Kerguelen Archipelago in the Indian sector of the Southern Ocean was investigated to identify the mechanisms of natural iron fertilization of the Kerguelen Plateau. In this study, the organic speciation of Fe is described. Samples were determined immediately on board using competing ligand-adsorptive cathodic stripping voltammetry (CL-AdCSV). The dissolved organic ligands were always in excess of the dissolved Fe concentration, increasing the residence time in the water column and the potential availability for phytoplankton. The concentration of the dissolved organic ligands ranged from 0.44 to 1.61 nEq of M Fe (=complexation site for Fe), with an average concentration of 0.91 nEq of M Fe (S.D.=0.28, n=113) and a mean logarithm of conditional stability constant (log K′) of 21.7 (S.D.=0.28, n=113). A second weaker dissolved organic ligand group was detected in 32% of the samples, with Fe-binding characteristics at the edge of the detection window of the applied method. The occurrence of the highest concentrations of dissolved organic ligands in the wind-mixed surface layer and near the sediment at the bottom of the water column indicated that both phytoplankton and the sediment act as sources. Both sources are in concert with the general conclusions from the KEOPS research on the sources of Fe, where Fe was regenerated, organic Fe-binding ligands were formed in the upper layers, and both Fe and ligands were supplied by the sediment. Article in Journal/Newspaper Southern Ocean Université de Bretagne Occidentale: HAL Southern Ocean Kerguelen Indian Deep Sea Research Part II: Topical Studies in Oceanography 55 5-7 606 621 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
Iron Organic complexation Natural iron fertilization Southern Ocean Kerguelen Plateau [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Iron Organic complexation Natural iron fertilization Southern Ocean Kerguelen Plateau [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Gerringa, Loes J.A. Blain, Stéphane Laan, Patrick Sarthou, Géraldine Veldhuis, Marcel Brussaard, Corina Viollier, Eric Timmermans, K.R. Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) |
topic_facet |
Iron Organic complexation Natural iron fertilization Southern Ocean Kerguelen Plateau [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience During the Kerguelen Ocean and Plateau compared Study (KEOPS; January–February 2005) cruise, the area southeast of the Kerguelen Archipelago in the Indian sector of the Southern Ocean was investigated to identify the mechanisms of natural iron fertilization of the Kerguelen Plateau. In this study, the organic speciation of Fe is described. Samples were determined immediately on board using competing ligand-adsorptive cathodic stripping voltammetry (CL-AdCSV). The dissolved organic ligands were always in excess of the dissolved Fe concentration, increasing the residence time in the water column and the potential availability for phytoplankton. The concentration of the dissolved organic ligands ranged from 0.44 to 1.61 nEq of M Fe (=complexation site for Fe), with an average concentration of 0.91 nEq of M Fe (S.D.=0.28, n=113) and a mean logarithm of conditional stability constant (log K′) of 21.7 (S.D.=0.28, n=113). A second weaker dissolved organic ligand group was detected in 32% of the samples, with Fe-binding characteristics at the edge of the detection window of the applied method. The occurrence of the highest concentrations of dissolved organic ligands in the wind-mixed surface layer and near the sediment at the bottom of the water column indicated that both phytoplankton and the sediment act as sources. Both sources are in concert with the general conclusions from the KEOPS research on the sources of Fe, where Fe was regenerated, organic Fe-binding ligands were formed in the upper layers, and both Fe and ligands were supplied by the sediment. |
author2 |
Royal Netherlands Institute for Sea Research (NIOZ) Laboratoire d'océanographie et de biogéochimie (LOB) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 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) Laboratoire de géochimie des Eaux (LGE) Université Paris Diderot - Paris 7 (UPD7)-Institut de Physique du Globe de Paris (IPG Paris) |
format |
Article in Journal/Newspaper |
author |
Gerringa, Loes J.A. Blain, Stéphane Laan, Patrick Sarthou, Géraldine Veldhuis, Marcel Brussaard, Corina Viollier, Eric Timmermans, K.R. |
author_facet |
Gerringa, Loes J.A. Blain, Stéphane Laan, Patrick Sarthou, Géraldine Veldhuis, Marcel Brussaard, Corina Viollier, Eric Timmermans, K.R. |
author_sort |
Gerringa, Loes J.A. |
title |
Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) |
title_short |
Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) |
title_full |
Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) |
title_fullStr |
Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) |
title_full_unstemmed |
Fe-binding dissolved organic ligands near the Kerguelen Archipelago in the Southern Ocean (Indian sector) |
title_sort |
fe-binding dissolved organic ligands near the kerguelen archipelago in the southern ocean (indian sector) |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.univ-brest.fr/hal-00456398 https://doi.org/10.1016/j.dsr2.2007.12.007 |
geographic |
Southern Ocean Kerguelen Indian |
geographic_facet |
Southern Ocean Kerguelen Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.univ-brest.fr/hal-00456398 Deep Sea Research Part II: Topical Studies in Oceanography, 2008, 55 (5-7), pp.606-621. ⟨10.1016/j.dsr2.2007.12.007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2007.12.007 hal-00456398 https://hal.univ-brest.fr/hal-00456398 doi:10.1016/j.dsr2.2007.12.007 |
op_doi |
https://doi.org/10.1016/j.dsr2.2007.12.007 |
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Deep Sea Research Part II: Topical Studies in Oceanography |
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55 |
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621 |
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