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 within...
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2015
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Online Access: | https://doi.org/10.17882/40729 |
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ftseanoe:oai:seanoe.org:40729 2023-05-15T17:02:01+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. North -46.5, South -51.0, East 75.0, West 66.0 2015-11 https://doi.org/10.17882/40729 unknown SEANOE doi:10.17882/40729 http://dx.doi.org/10.17882/40729 CC-BY-NC-ND CC-BY-NC-ND dataset 2015 ftseanoe https://doi.org/10.17882/40729 2021-12-09T18:22:03Z 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. Dataset Kerguelen Islands Southern Ocean SEANOE (Sea scientific open data publication) Hillsborough Bay ENVELOPE(69.775,69.775,-49.219,-49.219) Kerguelen Kerguelen Islands Southern Ocean |
institution |
Open Polar |
collection |
SEANOE (Sea scientific open data publication) |
op_collection_id |
ftseanoe |
language |
unknown |
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 |
Dataset |
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. |
spellingShingle |
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) |
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 |
SEANOE |
publishDate |
2015 |
url |
https://doi.org/10.17882/40729 |
op_coverage |
North -46.5, South -51.0, East 75.0, West 66.0 |
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_relation |
doi:10.17882/40729 http://dx.doi.org/10.17882/40729 |
op_rights |
CC-BY-NC-ND |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.17882/40729 |
_version_ |
1766055241246048256 |