A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean
International audience In the context of the iron hypothesis, the biogeochemical characteristics of the water masses located in the N-E wake of the Kerguelen archipelago were studied in austral spring 1995 during the ANTARES 3/France JGOFS cruise. In agreement with satellite observations (CZCS and S...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2001
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Subjects: | |
Online Access: | https://hal.science/hal-00481371 https://doi.org/10.1016/S0967-0637(00)00047-9 |
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ftceafr:oai:HAL:hal-00481371v1 |
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openpolar |
institution |
Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Blain, Stéphane Tréguer, Paul Belviso, Sauveur Bucciarelli, Eva Denis, Michel Desabre, Stéphanie Fiala, Michel Martin-Jézéquel, Véronique Le Fèvre, Jacques Mayzaud, Patrick Marty, Jean-Claude Razouls, Suzanne A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience In the context of the iron hypothesis, the biogeochemical characteristics of the water masses located in the N-E wake of the Kerguelen archipelago were studied in austral spring 1995 during the ANTARES 3/France JGOFS cruise. In agreement with satellite observations (CZCS and SeaWifs data), this cruise showed the surface waters in the wake of the Kerguelen archipelago to be rich in both chlorophyll a and dissolved iron, compared to other observations in the HNLC oceanic waters of the Southern Ocean. This gives support to the hypothesis that natural fertilization due to iron inputs occurs in the waters surrounding the Antarctic Islands. However, the mesoscale structure of the water masses in the study area was complex, and three contrasted zones were identified within the region of lesser or greater iron enrichment. The coastal zone was characterized by very high concentrations of dissolved iron (>10 nM) and lithogenic material, but the phytoplankton biomass, dominated by small species, was low. An intrusion of cold Antarctic surface water, rich in silicic acid, was eparated from the coastal zone by a shelf-break front. This water tongue contained chlorophyll a concentrations as low (<0.3 µg l-1) as in the iron-poor open ocean. A third water body, offshore, was characterized by the highest concentrations of phytoplankton (cell abundance and chlorophyll a) and biogenic silica, the community being dominated by large diatoms and dinoflagellates. The distribution of conservative tracers and lithogenic elements, as well as the phytoplankton taxonomic composition, indicate that this offshore water was not derived from a coastal origin. It more likely resulted from the mixing of the Antarctic water tongue flowing northward along the island continental slope with subantarctic surface water flowing eastward north of the Kerguelen Islands. As regards the interactions between dissolved iron and phytoplankton biomass and growth in surface waters, two typical situations were encountered. Although ... |
author2 |
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 des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) ICOS-RAMCES (ICOS-RAMCES) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM) Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie biologique de Banyuls (LOBB) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Blain, Stéphane Tréguer, Paul Belviso, Sauveur Bucciarelli, Eva Denis, Michel Desabre, Stéphanie Fiala, Michel Martin-Jézéquel, Véronique Le Fèvre, Jacques Mayzaud, Patrick Marty, Jean-Claude Razouls, Suzanne |
author_facet |
Blain, Stéphane Tréguer, Paul Belviso, Sauveur Bucciarelli, Eva Denis, Michel Desabre, Stéphanie Fiala, Michel Martin-Jézéquel, Véronique Le Fèvre, Jacques Mayzaud, Patrick Marty, Jean-Claude Razouls, Suzanne |
author_sort |
Blain, Stéphane |
title |
A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean |
title_short |
A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean |
title_full |
A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean |
title_fullStr |
A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean |
title_full_unstemmed |
A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean |
title_sort |
biogeochemical study of the island mass effect in the context of the iron hypothesis: kerguelen islands, southern ocean |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.science/hal-00481371 https://doi.org/10.1016/S0967-0637(00)00047-9 |
genre |
Antarc* Antarctic Kerguelen Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Kerguelen Islands Southern Ocean |
op_source |
ISSN: 0146-6291 Deep Sea Research https://hal.science/hal-00481371 Deep Sea Research, 2001, 48, pp.163-187. ⟨10.1016/S0967-0637(00)00047-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0967-0637(00)00047-9 hal-00481371 https://hal.science/hal-00481371 doi:10.1016/S0967-0637(00)00047-9 |
op_doi |
https://doi.org/10.1016/S0967-0637(00)00047-9 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
48 |
container_issue |
1 |
container_start_page |
163 |
op_container_end_page |
187 |
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1810495600001548288 |
spelling |
ftceafr:oai:HAL:hal-00481371v1 2024-09-15T17:47:04+00:00 A biogeochemical study of the island mass effect in the context of the iron hypothesis: Kerguelen Islands, Southern Ocean Blain, Stéphane Tréguer, Paul Belviso, Sauveur Bucciarelli, Eva Denis, Michel Desabre, Stéphanie Fiala, Michel Martin-Jézéquel, Véronique Le Fèvre, Jacques Mayzaud, Patrick Marty, Jean-Claude Razouls, Suzanne 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 des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) ICOS-RAMCES (ICOS-RAMCES) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM) Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie biologique de Banyuls (LOBB) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2001 https://hal.science/hal-00481371 https://doi.org/10.1016/S0967-0637(00)00047-9 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/S0967-0637(00)00047-9 hal-00481371 https://hal.science/hal-00481371 doi:10.1016/S0967-0637(00)00047-9 ISSN: 0146-6291 Deep Sea Research https://hal.science/hal-00481371 Deep Sea Research, 2001, 48, pp.163-187. ⟨10.1016/S0967-0637(00)00047-9⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2001 ftceafr https://doi.org/10.1016/S0967-0637(00)00047-9 2024-07-22T12:57:41Z International audience In the context of the iron hypothesis, the biogeochemical characteristics of the water masses located in the N-E wake of the Kerguelen archipelago were studied in austral spring 1995 during the ANTARES 3/France JGOFS cruise. In agreement with satellite observations (CZCS and SeaWifs data), this cruise showed the surface waters in the wake of the Kerguelen archipelago to be rich in both chlorophyll a and dissolved iron, compared to other observations in the HNLC oceanic waters of the Southern Ocean. This gives support to the hypothesis that natural fertilization due to iron inputs occurs in the waters surrounding the Antarctic Islands. However, the mesoscale structure of the water masses in the study area was complex, and three contrasted zones were identified within the region of lesser or greater iron enrichment. The coastal zone was characterized by very high concentrations of dissolved iron (>10 nM) and lithogenic material, but the phytoplankton biomass, dominated by small species, was low. An intrusion of cold Antarctic surface water, rich in silicic acid, was eparated from the coastal zone by a shelf-break front. This water tongue contained chlorophyll a concentrations as low (<0.3 µg l-1) as in the iron-poor open ocean. A third water body, offshore, was characterized by the highest concentrations of phytoplankton (cell abundance and chlorophyll a) and biogenic silica, the community being dominated by large diatoms and dinoflagellates. The distribution of conservative tracers and lithogenic elements, as well as the phytoplankton taxonomic composition, indicate that this offshore water was not derived from a coastal origin. It more likely resulted from the mixing of the Antarctic water tongue flowing northward along the island continental slope with subantarctic surface water flowing eastward north of the Kerguelen Islands. As regards the interactions between dissolved iron and phytoplankton biomass and growth in surface waters, two typical situations were encountered. Although ... Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands Southern Ocean HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Deep Sea Research Part I: Oceanographic Research Papers 48 1 163 187 |