Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics
International audience The KEOPS2 project aims to elucidate the role of natural Fe fertilisation on biogeochemical cycles and ecosystem functioning, including quantifying the sources and processes by which iron is delivered in the vicinity of the Kerguelen Archipelago, Southern Ocean. The KEOPS2 pro...
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-01207931 https://hal.sorbonne-universite.fr/hal-01207931/document https://hal.sorbonne-universite.fr/hal-01207931/file/bg-12-739-2015.pdf https://doi.org/10.5194/bg-12-739-2015 |
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ftinsu:oai:HAL:hal-01207931v1 |
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openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
SEDIMENT MINERALS DELIVERY ACL OCEAN WATER MATTER SEA GEOCHEMISTRY SOLUBILITY EVOLUTION [SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
SEDIMENT MINERALS DELIVERY ACL OCEAN WATER MATTER SEA GEOCHEMISTRY SOLUBILITY EVOLUTION [SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere van Der Merwe, P. Bowie, A. R. Quéroué, F. Armand, L. Blain, S. Chever, Fanny Davies, D. Dehairs, F. Planchon, Frédéric Sarthou, Géraldine Townsend, A. T. Trull, T. W. Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics |
topic_facet |
SEDIMENT MINERALS DELIVERY ACL OCEAN WATER MATTER SEA GEOCHEMISTRY SOLUBILITY EVOLUTION [SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The KEOPS2 project aims to elucidate the role of natural Fe fertilisation on biogeochemical cycles and ecosystem functioning, including quantifying the sources and processes by which iron is delivered in the vicinity of the Kerguelen Archipelago, Southern Ocean. The KEOPS2 process study used an upstream high-nutrient, low-chlorophyll (HNLC), deep water (2500 m), reference station to compare with a shallow (500 m), strongly fertilised plateau station and continued the observations to a downstream, bathymetrically trapped recirculation of the Polar Front where eddies commonly form and persist for hundreds of kilometres into the Southern Ocean. Over the Kerguelen Plateau, mean particulate (1–53 μm) Fe and Al concentrations (pFe = 13.4 nM, pAl = 25.2 nM) were more than 20-fold higher than at an offshore (lower-productivity) reference station (pFe = 0.53 nM, pAl = 0.83 nM). In comparison, over the plateau dissolved Fe levels were only elevated by a factor of ~ 2. Over the Kerguelen Plateau, ratios of pMn / pAl and pFe / pAl resemble basalt, likely originating from glacial/fluvial inputs into shallow coastal waters. In downstream, offshore deep-waters, higher pFe / pAl, and pMn / pAl ratios were observed, suggesting loss of lithogenic material accompanied by retention of pFe and pMn. Biological uptake of dissolved Fe and Mn and conversion into the biogenic particulate fraction or aggregation of particulate metals onto bioaggregates also increased these ratios further in surface waters as the bloom developed within the recirculation structure. While resuspension of shelf sediments is likely to be one of the important mechanisms of Fe fertilisation over the plateau, fluvial and glacial sources appear to be important to areas downstream of the island. Vertical profiles within an offshore recirculation feature associated with the Polar Front show pFe and pMn levels that were 6-fold and 3.5-fold lower, respectively, than over the plateau in surface waters, though still 3.6-fold and 1.7-fold higher ... |
author2 |
Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) Institute for Marine and Antarctic Studies Hobart (IMAS) University of Tasmania Hobart, Australia (UTAS) 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) Macquarie University 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) Laboratoire Environnement Profond (LEP) Etudes des Ecosystèmes Profonds (EEP) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Analytical, Environmental and Geo- Chemistry Vrije Universiteit Brussel (VUB) CSIRO Marine and Atmosphere Research Hobart Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO) ANR-10-BLAN-0614,KEOPS 2,Kerguelen : Comparaison plateau Ocean2(2010) |
format |
Article in Journal/Newspaper |
author |
van Der Merwe, P. Bowie, A. R. Quéroué, F. Armand, L. Blain, S. Chever, Fanny Davies, D. Dehairs, F. Planchon, Frédéric Sarthou, Géraldine Townsend, A. T. Trull, T. W. |
author_facet |
van Der Merwe, P. Bowie, A. R. Quéroué, F. Armand, L. Blain, S. Chever, Fanny Davies, D. Dehairs, F. Planchon, Frédéric Sarthou, Géraldine Townsend, A. T. Trull, T. W. |
author_sort |
van Der Merwe, P. |
title |
Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics |
title_short |
Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics |
title_full |
Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics |
title_fullStr |
Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics |
title_full_unstemmed |
Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics |
title_sort |
sourcing the iron in the naturally fertilised bloom around the kerguelen plateau: particulate trace metal dynamics |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01207931 https://hal.sorbonne-universite.fr/hal-01207931/document https://hal.sorbonne-universite.fr/hal-01207931/file/bg-12-739-2015.pdf https://doi.org/10.5194/bg-12-739-2015 |
geographic |
Southern Ocean Kerguelen |
geographic_facet |
Southern Ocean Kerguelen |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01207931 Biogeosciences, 2015, 12 (3), pp.739-755. ⟨10.5194/bg-12-739-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-739-2015 hal-01207931 https://hal.sorbonne-universite.fr/hal-01207931 https://hal.sorbonne-universite.fr/hal-01207931/document https://hal.sorbonne-universite.fr/hal-01207931/file/bg-12-739-2015.pdf doi:10.5194/bg-12-739-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-12-739-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
3 |
container_start_page |
739 |
op_container_end_page |
755 |
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1790608461392773120 |
spelling |
ftinsu:oai:HAL:hal-01207931v1 2024-02-11T10:08:50+01:00 Sourcing the iron in the naturally fertilised bloom around the Kerguelen Plateau: particulate trace metal dynamics van Der Merwe, P. Bowie, A. R. Quéroué, F. Armand, L. Blain, S. Chever, Fanny Davies, D. Dehairs, F. Planchon, Frédéric Sarthou, Géraldine Townsend, A. T. Trull, T. W. Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) Institute for Marine and Antarctic Studies Hobart (IMAS) University of Tasmania Hobart, Australia (UTAS) 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) Macquarie University 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) Laboratoire Environnement Profond (LEP) Etudes des Ecosystèmes Profonds (EEP) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Analytical, Environmental and Geo- Chemistry Vrije Universiteit Brussel (VUB) CSIRO Marine and Atmosphere Research Hobart Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO) ANR-10-BLAN-0614,KEOPS 2,Kerguelen : Comparaison plateau Ocean2(2010) 2015 https://hal.sorbonne-universite.fr/hal-01207931 https://hal.sorbonne-universite.fr/hal-01207931/document https://hal.sorbonne-universite.fr/hal-01207931/file/bg-12-739-2015.pdf https://doi.org/10.5194/bg-12-739-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-739-2015 hal-01207931 https://hal.sorbonne-universite.fr/hal-01207931 https://hal.sorbonne-universite.fr/hal-01207931/document https://hal.sorbonne-universite.fr/hal-01207931/file/bg-12-739-2015.pdf doi:10.5194/bg-12-739-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01207931 Biogeosciences, 2015, 12 (3), pp.739-755. ⟨10.5194/bg-12-739-2015⟩ SEDIMENT MINERALS DELIVERY ACL OCEAN WATER MATTER SEA GEOCHEMISTRY SOLUBILITY EVOLUTION [SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2015 ftinsu https://doi.org/10.5194/bg-12-739-2015 2024-01-24T17:39:32Z International audience The KEOPS2 project aims to elucidate the role of natural Fe fertilisation on biogeochemical cycles and ecosystem functioning, including quantifying the sources and processes by which iron is delivered in the vicinity of the Kerguelen Archipelago, Southern Ocean. The KEOPS2 process study used an upstream high-nutrient, low-chlorophyll (HNLC), deep water (2500 m), reference station to compare with a shallow (500 m), strongly fertilised plateau station and continued the observations to a downstream, bathymetrically trapped recirculation of the Polar Front where eddies commonly form and persist for hundreds of kilometres into the Southern Ocean. Over the Kerguelen Plateau, mean particulate (1–53 μm) Fe and Al concentrations (pFe = 13.4 nM, pAl = 25.2 nM) were more than 20-fold higher than at an offshore (lower-productivity) reference station (pFe = 0.53 nM, pAl = 0.83 nM). In comparison, over the plateau dissolved Fe levels were only elevated by a factor of ~ 2. Over the Kerguelen Plateau, ratios of pMn / pAl and pFe / pAl resemble basalt, likely originating from glacial/fluvial inputs into shallow coastal waters. In downstream, offshore deep-waters, higher pFe / pAl, and pMn / pAl ratios were observed, suggesting loss of lithogenic material accompanied by retention of pFe and pMn. Biological uptake of dissolved Fe and Mn and conversion into the biogenic particulate fraction or aggregation of particulate metals onto bioaggregates also increased these ratios further in surface waters as the bloom developed within the recirculation structure. While resuspension of shelf sediments is likely to be one of the important mechanisms of Fe fertilisation over the plateau, fluvial and glacial sources appear to be important to areas downstream of the island. Vertical profiles within an offshore recirculation feature associated with the Polar Front show pFe and pMn levels that were 6-fold and 3.5-fold lower, respectively, than over the plateau in surface waters, though still 3.6-fold and 1.7-fold higher ... Article in Journal/Newspaper Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Southern Ocean Kerguelen Biogeosciences 12 3 739 755 |