High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean)
International audience Dissolved Fe (dFe) concentrations were measured in the upper 1300 m of the water column in the vicinity of the Kerguelen Islands as part of the second KErguelen Ocean Plateau compared Study (KEOPS2). Concentrations ranged from 0.06 nmol L -1 in offshore, Southern Ocean waters...
Main Authors: | , , , , , , , , , , , |
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Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.science/hal-04114787 https://doi.org/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 |
id |
ftccsdartic:oai:HAL:hal-04114787v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Earth Science [SDU]Sciences of the Universe [physics] Quéroué, F. Sarthou, G. Planquette, H. F. Bucciarelli, E. Chever, F. van der Merwe, P. Lannuzel, D. Townsend, A. T. Cheize, M. Blain, S. d'Ovidio, F. Bowie, A. R. High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
topic_facet |
Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience Dissolved Fe (dFe) concentrations were measured in the upper 1300 m of the water column in the vicinity of the Kerguelen Islands as part of the second KErguelen Ocean Plateau compared Study (KEOPS2). Concentrations ranged from 0.06 nmol L -1 in offshore, Southern Ocean waters to 3.82 nmol L -1 within Hillsborough Bay, on the north-eastern coast of the Kerguelen Islands. Direct island runoff, glacial melting and resuspended sediments were identified as important inputs of dFe that could potentially fertilise the northern part of the plateau. A significant deep dFe enrichment was observed over the plateau with dFe concentrations increasing up to 1.30 nmol L -1 close to the seafloor, probably due to sediment resuspension and pore water release. Biological uptake was shown to induce a significant decrease in dFe concentrations between two visits (28 days apart) at a station above the plateau. Our work also considered other processes and sources, such as lateral advection of enriched seawater, remineralisation processes, and the influence of the polar front (PF) as a vector for Fe transport. Overall, heterogeneous sources of Fe over and off the Kerguelen Plateau, in addition to strong variability in Fe supply by vertical or horizontal transport, may explain the high variability in dFe concentrations observed during this study. |
author2 |
Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris 6 (UPMC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Quéroué, F. Sarthou, G. Planquette, H. F. Bucciarelli, E. Chever, F. van der Merwe, P. Lannuzel, D. Townsend, A. T. Cheize, M. Blain, S. d'Ovidio, F. Bowie, A. R. |
author_facet |
Quéroué, F. Sarthou, G. Planquette, H. F. Bucciarelli, E. Chever, F. van der Merwe, P. Lannuzel, D. Townsend, A. T. Cheize, M. Blain, S. d'Ovidio, F. Bowie, A. R. |
author_sort |
Quéroué, F. |
title |
High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
title_short |
High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
title_full |
High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
title_fullStr |
High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
title_full_unstemmed |
High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
title_sort |
high variability in dissolved iron concentrations in the vicinity of the kerguelen islands (southern ocean) |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-04114787 https://doi.org/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 |
long_lat |
ENVELOPE(69.775,69.775,-49.219,-49.219) |
geographic |
Southern Ocean Kerguelen Kerguelen Islands Hillsborough Bay |
geographic_facet |
Southern Ocean Kerguelen Kerguelen Islands Hillsborough Bay |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
Biogeosciences https://hal.science/hal-04114787 Biogeosciences, 2015, 12, pp.3869-3883. ⟨10.5194/bg-12-3869-201510.5194/bgd-12-231-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 hal-04114787 https://hal.science/hal-04114787 BIBCODE: 2015BGeo.12.3869Q doi:10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 |
op_doi |
https://doi.org/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 |
_version_ |
1769007161856229376 |
spelling |
ftccsdartic:oai:HAL:hal-04114787v1 2023-06-18T03:41:32+02:00 High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) Quéroué, F. Sarthou, G. Planquette, H. F. Bucciarelli, E. Chever, F. van der Merwe, P. Lannuzel, D. Townsend, A. T. Cheize, M. Blain, S. d'Ovidio, F. Bowie, A. R. Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Université Pierre et Marie Curie - Paris 6 (UPMC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2015 https://hal.science/hal-04114787 https://doi.org/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 hal-04114787 https://hal.science/hal-04114787 BIBCODE: 2015BGeo.12.3869Q doi:10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 Biogeosciences https://hal.science/hal-04114787 Biogeosciences, 2015, 12, pp.3869-3883. ⟨10.5194/bg-12-3869-201510.5194/bgd-12-231-2015⟩ Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.5194/bg-12-3869-201510.5194/bgd-12-231-2015 2023-06-03T23:49:51Z International audience Dissolved Fe (dFe) concentrations were measured in the upper 1300 m of the water column in the vicinity of the Kerguelen Islands as part of the second KErguelen Ocean Plateau compared Study (KEOPS2). Concentrations ranged from 0.06 nmol L -1 in offshore, Southern Ocean waters to 3.82 nmol L -1 within Hillsborough Bay, on the north-eastern coast of the Kerguelen Islands. Direct island runoff, glacial melting and resuspended sediments were identified as important inputs of dFe that could potentially fertilise the northern part of the plateau. A significant deep dFe enrichment was observed over the plateau with dFe concentrations increasing up to 1.30 nmol L -1 close to the seafloor, probably due to sediment resuspension and pore water release. Biological uptake was shown to induce a significant decrease in dFe concentrations between two visits (28 days apart) at a station above the plateau. Our work also considered other processes and sources, such as lateral advection of enriched seawater, remineralisation processes, and the influence of the polar front (PF) as a vector for Fe transport. Overall, heterogeneous sources of Fe over and off the Kerguelen Plateau, in addition to strong variability in Fe supply by vertical or horizontal transport, may explain the high variability in dFe concentrations observed during this study. Article in Journal/Newspaper Kerguelen Islands Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Kerguelen Kerguelen Islands Hillsborough Bay ENVELOPE(69.775,69.775,-49.219,-49.219) |