High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean)
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 withi...
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ftdoajarticles:oai:doaj.org/article:688a5065f1724de0964578bb5c25a940 2023-05-15T17:02:01+02:00 High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) F. Quéroué G. Sarthou H. F. Planquette E. Bucciarelli F. Chever P. van der Merwe D. Lannuzel A. T. Townsend M. Cheize S. Blain F. d'Ovidio A. R. Bowie 2015-06-01T00:00:00Z https://doi.org/10.5194/bg-12-3869-2015 https://doaj.org/article/688a5065f1724de0964578bb5c25a940 EN eng Copernicus Publications http://www.biogeosciences.net/12/3869/2015/bg-12-3869-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-3869-2015 https://doaj.org/article/688a5065f1724de0964578bb5c25a940 Biogeosciences, Vol 12, Iss 12, Pp 3869-3883 (2015) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/bg-12-3869-2015 2022-12-31T13:11:30Z 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 Directory of Open Access Journals: DOAJ Articles Hillsborough Bay ENVELOPE(69.775,69.775,-49.219,-49.219) Kerguelen Kerguelen Islands Southern Ocean Biogeosciences 12 12 3869 3883 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 F. Quéroué G. Sarthou H. F. Planquette E. Bucciarelli F. Chever P. van der Merwe D. Lannuzel A. T. Townsend M. Cheize S. Blain F. d'Ovidio A. R. Bowie High variability in dissolved iron concentrations in the vicinity of the Kerguelen Islands (Southern Ocean) |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
F. Quéroué G. Sarthou H. F. Planquette E. Bucciarelli F. Chever P. van der Merwe D. Lannuzel A. T. Townsend M. Cheize S. Blain F. d'Ovidio A. R. Bowie |
author_facet |
F. Quéroué G. Sarthou H. F. Planquette E. Bucciarelli F. Chever P. van der Merwe D. Lannuzel A. T. Townsend M. Cheize S. Blain F. d'Ovidio A. R. Bowie |
author_sort |
F. Quéroué |
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 |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-3869-2015 https://doaj.org/article/688a5065f1724de0964578bb5c25a940 |
long_lat |
ENVELOPE(69.775,69.775,-49.219,-49.219) |
geographic |
Hillsborough Bay Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Hillsborough Bay Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
Biogeosciences, Vol 12, Iss 12, Pp 3869-3883 (2015) |
op_relation |
http://www.biogeosciences.net/12/3869/2015/bg-12-3869-2015.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-12-3869-2015 https://doaj.org/article/688a5065f1724de0964578bb5c25a940 |
op_doi |
https://doi.org/10.5194/bg-12-3869-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
12 |
container_start_page |
3869 |
op_container_end_page |
3883 |
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1766055241430597632 |