Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2
International audience Iron availability in the Southern Ocean controls phytoplankton growth, community composition and the uptake of atmospheric CO 2 by the biological pump. The KEOPS-2 (KErguelen Ocean and Plateau compared Study 2) "process study", took place around the Kerguelen Plateau...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315/document https://hal.sorbonne-universite.fr/hal-01207315/file/bg-12-4421-2015.pdf https://doi.org/10.5194/bg-12-4421-2015 |
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ftunivnantes:oai:HAL:hal-01207315v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
ISLANDS ACL DISSOLVED IRON PHYTOPLANKTON BLOOM PARTICLES PLATEAU TRACE-ELEMENTS CARBON EXPORT ORGANIC-LIGANDS MARINE SEDIMENT WATER COLUMN [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
ISLANDS ACL DISSOLVED IRON PHYTOPLANKTON BLOOM PARTICLES PLATEAU TRACE-ELEMENTS CARBON EXPORT ORGANIC-LIGANDS MARINE SEDIMENT WATER COLUMN [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Bowie, Andrew R. van Der Merwe, Pier Quéroué, Fabien Trull, Thomas W. Fourquez, M. Planchon, Frédéric Sarthou, Géraldine Chever, Fanny Townsend, A. T. Obernosterer, Ingrid Sallée, Jean-Baptiste Blain, Stéphane Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
topic_facet |
ISLANDS ACL DISSOLVED IRON PHYTOPLANKTON BLOOM PARTICLES PLATEAU TRACE-ELEMENTS CARBON EXPORT ORGANIC-LIGANDS MARINE SEDIMENT WATER COLUMN [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Iron availability in the Southern Ocean controls phytoplankton growth, community composition and the uptake of atmospheric CO 2 by the biological pump. The KEOPS-2 (KErguelen Ocean and Plateau compared Study 2) "process study", took place around the Kerguelen Plateau in the Indian sector of the Southern Ocean. This is a region naturally fertilised with iron on the scale of hundreds to thousands of square kilometres, producing a mosaic of spring blooms which show distinct biological and biogeochemical responses to fertilisation. This paper presents biogeochemical iron budgets (incorporating vertical and lateral supply, internal cycling, and sinks) for three contrasting sites: an upstream high-nutrient low-chlorophyll reference, over the plateau and in the offshore plume east of the Kerguelen Islands. These budgets show that distinct regional environments driven by complex circulation and transport pathways are responsible for differences in the mode and strength of iron supply, with vertical supply dominant on the plateau and lateral supply dominant in the plume. Iron supply from "new" sources (diffusion, upwelling, entrainment, lateral advection, atmospheric dust) to the surface waters of the plume was double that above the plateau and 20 times greater than at the reference site, whilst iron demand (measured by cellular uptake) in the plume was similar to that above the plateau but 40 times greater than at the reference site. "Recycled" iron supply by bacterial regeneration and zooplankton grazing was a relatively minor component at all sites (< 8 % of new supply), in contrast to earlier findings from other biogeochemical iron budgets in the Southern Ocean. Over the plateau, a particulate iron dissolution term of 2.5 % was invoked to balance the budget; this approximately doubled the standing stock of dissolved iron in the mixed layer. The exchange of iron between dissolved, biogenic particulate and lithogenic particulate pools was highly dynamic in time and space, resulting in a ... |
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) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) Institute for Marine and Antarctic Studies Hobart (IMAS) University of Tasmania Hobart, Australia (UTAS) CSIRO Marine and Atmospheric Research (CSIRO-MAR) Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO) Laboratoire d'Océanographie Microbienne (LOMIC) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ANR-10-BLAN-0614,KEOPS 2,Kerguelen : Comparaison plateau Ocean2(2010) ANR-10-JCJC-0606,ICOP,Impact des interactions Fe-Cu sur le phytoplancton océanique(2010) |
format |
Article in Journal/Newspaper |
author |
Bowie, Andrew R. van Der Merwe, Pier Quéroué, Fabien Trull, Thomas W. Fourquez, M. Planchon, Frédéric Sarthou, Géraldine Chever, Fanny Townsend, A. T. Obernosterer, Ingrid Sallée, Jean-Baptiste Blain, Stéphane |
author_facet |
Bowie, Andrew R. van Der Merwe, Pier Quéroué, Fabien Trull, Thomas W. Fourquez, M. Planchon, Frédéric Sarthou, Géraldine Chever, Fanny Townsend, A. T. Obernosterer, Ingrid Sallée, Jean-Baptiste Blain, Stéphane |
author_sort |
Bowie, Andrew R. |
title |
Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
title_short |
Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
title_full |
Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
title_fullStr |
Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
title_full_unstemmed |
Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
title_sort |
iron budgets for three distinct biogeochemical sites around the kerguelen archipelago (southern ocean) during the natural fertilisation study, keops-2 |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315/document https://hal.sorbonne-universite.fr/hal-01207315/file/bg-12-4421-2015.pdf https://doi.org/10.5194/bg-12-4421-2015 |
geographic |
Indian Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Indian Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01207315 Biogeosciences, 2015, 12 (14), pp.4421-4445. ⟨10.5194/bg-12-4421-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-4421-2015 hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315/document https://hal.sorbonne-universite.fr/hal-01207315/file/bg-12-4421-2015.pdf doi:10.5194/bg-12-4421-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-12-4421-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
14 |
container_start_page |
4421 |
op_container_end_page |
4445 |
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1766055413447393280 |
spelling |
ftunivnantes:oai:HAL:hal-01207315v1 2023-05-15T17:02:09+02:00 Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 Bowie, Andrew R. van Der Merwe, Pier Quéroué, Fabien Trull, Thomas W. Fourquez, M. Planchon, Frédéric Sarthou, Géraldine Chever, Fanny Townsend, A. T. Obernosterer, Ingrid Sallée, Jean-Baptiste Blain, Stéphane 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) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) Institute for Marine and Antarctic Studies Hobart (IMAS) University of Tasmania Hobart, Australia (UTAS) CSIRO Marine and Atmospheric Research (CSIRO-MAR) Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO) Laboratoire d'Océanographie Microbienne (LOMIC) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ANR-10-BLAN-0614,KEOPS 2,Kerguelen : Comparaison plateau Ocean2(2010) ANR-10-JCJC-0606,ICOP,Impact des interactions Fe-Cu sur le phytoplancton océanique(2010) 2015 https://hal.sorbonne-universite.fr/hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315/document https://hal.sorbonne-universite.fr/hal-01207315/file/bg-12-4421-2015.pdf https://doi.org/10.5194/bg-12-4421-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-4421-2015 hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315 https://hal.sorbonne-universite.fr/hal-01207315/document https://hal.sorbonne-universite.fr/hal-01207315/file/bg-12-4421-2015.pdf doi:10.5194/bg-12-4421-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01207315 Biogeosciences, 2015, 12 (14), pp.4421-4445. ⟨10.5194/bg-12-4421-2015⟩ ISLANDS ACL DISSOLVED IRON PHYTOPLANKTON BLOOM PARTICLES PLATEAU TRACE-ELEMENTS CARBON EXPORT ORGANIC-LIGANDS MARINE SEDIMENT WATER COLUMN [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.5194/bg-12-4421-2015 2023-01-18T01:17:18Z International audience Iron availability in the Southern Ocean controls phytoplankton growth, community composition and the uptake of atmospheric CO 2 by the biological pump. The KEOPS-2 (KErguelen Ocean and Plateau compared Study 2) "process study", took place around the Kerguelen Plateau in the Indian sector of the Southern Ocean. This is a region naturally fertilised with iron on the scale of hundreds to thousands of square kilometres, producing a mosaic of spring blooms which show distinct biological and biogeochemical responses to fertilisation. This paper presents biogeochemical iron budgets (incorporating vertical and lateral supply, internal cycling, and sinks) for three contrasting sites: an upstream high-nutrient low-chlorophyll reference, over the plateau and in the offshore plume east of the Kerguelen Islands. These budgets show that distinct regional environments driven by complex circulation and transport pathways are responsible for differences in the mode and strength of iron supply, with vertical supply dominant on the plateau and lateral supply dominant in the plume. Iron supply from "new" sources (diffusion, upwelling, entrainment, lateral advection, atmospheric dust) to the surface waters of the plume was double that above the plateau and 20 times greater than at the reference site, whilst iron demand (measured by cellular uptake) in the plume was similar to that above the plateau but 40 times greater than at the reference site. "Recycled" iron supply by bacterial regeneration and zooplankton grazing was a relatively minor component at all sites (< 8 % of new supply), in contrast to earlier findings from other biogeochemical iron budgets in the Southern Ocean. Over the plateau, a particulate iron dissolution term of 2.5 % was invoked to balance the budget; this approximately doubled the standing stock of dissolved iron in the mixed layer. The exchange of iron between dissolved, biogenic particulate and lithogenic particulate pools was highly dynamic in time and space, resulting in a ... Article in Journal/Newspaper Kerguelen Islands Southern Ocean Université de Nantes: HAL-UNIV-NANTES Indian Kerguelen Kerguelen Islands Southern Ocean Biogeosciences 12 14 4421 4445 |