A biogeochemical study of the island mass effect in the context of the Iron Hypothesis : Kerguelen Islands, Southern Ocean.
International audience As part of the ANTARES 3/F-JGOFS cruise, the distributions of dissolved iron and manganese were measured in October 1995 in the north-east wake of the Kerguelen archipelago, an area that shows high phytoplankton biomass in the middle of the high nutrient low chlorophyll Southe...
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ftunivbrest:oai:HAL:hal-00474512v1 2024-02-11T09:55:55+01:00 A biogeochemical study of the island mass effect in the context of the Iron Hypothesis : Kerguelen Islands, Southern Ocean. Bucciarelli, Eva Blain, Stéphane Tréguer, Paul 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) 2001 https://hal.science/hal-00474512 en eng HAL CCSD Elsevier hal-00474512 https://hal.science/hal-00474512 ISSN: 0304-4203 Marine Chemistry https://hal.science/hal-00474512 Marine Chemistry, 2001, 73, pp.21-36 iron manganese Southern Ocean Kerguelen Islands [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2001 ftunivbrest 2024-01-23T23:37:00Z International audience As part of the ANTARES 3/F-JGOFS cruise, the distributions of dissolved iron and manganese were measured in October 1995 in the north-east wake of the Kerguelen archipelago, an area that shows high phytoplankton biomass in the middle of the high nutrient low chlorophyll Southern Ocean. The study area comprised a branch of the Polar Front with Antarctic Surface Water intruding northward shouldering the shelf break of the Kerguelen Plateau. The coastal zone was clearly affected by material of lithogenic origin as well as by inputs from the sediments, its near surface waters showing considerable enrichment in dissolved iron (5.3-12.6 nM) and in dissolved manganese (2.9-8.6 nM). The offshore waters, although less enriched in trace-metals, were also affected by trace-metal inputs from coastal and continental shelf origin. Dissolved iron and manganese concentrations in these waters were 0.46-0.71 nM and 0.68-1.3 nM, i.e. far over typical antarctic open ocean surface water concentrations. The dissolved iron enrichment in coastal waters of the Kerguelen Islands is much more important (about ten times) than for the Galapagos Islands, another oasis in the HNLC Equatorial oceanic system, where the concentration increase in dissolved iron in the surface waters around the islands is mostly driven by upwelling of the Equatorial UnderCurrent as it reaches the Galapagos Platform. Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands Southern Ocean Université de Bretagne Occidentale: HAL Antarctic Southern Ocean Kerguelen Galapagos Kerguelen Islands |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
iron manganese Southern Ocean Kerguelen Islands [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
iron manganese Southern Ocean Kerguelen Islands [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Bucciarelli, Eva Blain, Stéphane Tréguer, Paul A biogeochemical study of the island mass effect in the context of the Iron Hypothesis : Kerguelen Islands, Southern Ocean. |
topic_facet |
iron manganese Southern Ocean Kerguelen Islands [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience As part of the ANTARES 3/F-JGOFS cruise, the distributions of dissolved iron and manganese were measured in October 1995 in the north-east wake of the Kerguelen archipelago, an area that shows high phytoplankton biomass in the middle of the high nutrient low chlorophyll Southern Ocean. The study area comprised a branch of the Polar Front with Antarctic Surface Water intruding northward shouldering the shelf break of the Kerguelen Plateau. The coastal zone was clearly affected by material of lithogenic origin as well as by inputs from the sediments, its near surface waters showing considerable enrichment in dissolved iron (5.3-12.6 nM) and in dissolved manganese (2.9-8.6 nM). The offshore waters, although less enriched in trace-metals, were also affected by trace-metal inputs from coastal and continental shelf origin. Dissolved iron and manganese concentrations in these waters were 0.46-0.71 nM and 0.68-1.3 nM, i.e. far over typical antarctic open ocean surface water concentrations. The dissolved iron enrichment in coastal waters of the Kerguelen Islands is much more important (about ten times) than for the Galapagos Islands, another oasis in the HNLC Equatorial oceanic system, where the concentration increase in dissolved iron in the surface waters around the islands is mostly driven by upwelling of the Equatorial UnderCurrent as it reaches the Galapagos Platform. |
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) |
format |
Article in Journal/Newspaper |
author |
Bucciarelli, Eva Blain, Stéphane Tréguer, Paul |
author_facet |
Bucciarelli, Eva Blain, Stéphane Tréguer, Paul |
author_sort |
Bucciarelli, Eva |
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-00474512 |
geographic |
Antarctic Southern Ocean Kerguelen Galapagos Kerguelen Islands |
geographic_facet |
Antarctic Southern Ocean Kerguelen Galapagos Kerguelen Islands |
genre |
Antarc* Antarctic Kerguelen Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Kerguelen Islands Southern Ocean |
op_source |
ISSN: 0304-4203 Marine Chemistry https://hal.science/hal-00474512 Marine Chemistry, 2001, 73, pp.21-36 |
op_relation |
hal-00474512 https://hal.science/hal-00474512 |
_version_ |
1790599559288717312 |