Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2
Iron availability in the Southern Ocean controls phytoplankton growth, community composition and the uptake of atmospheric CO2 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...
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Copernicus Gesellschaft Mbh
2015
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Online Access: | https://doi.org/10.5194/bg-12-4421-2015 https://archimer.ifremer.fr/doc/00276/38726/37233.pdf https://archimer.ifremer.fr/doc/00276/38726/37234.pdf https://archimer.ifremer.fr/doc/00276/38726/71319.pdf https://archimer.ifremer.fr/doc/00276/38726/71320.pdf https://archimer.ifremer.fr/doc/00276/38726/ |
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fttriple:oai:gotriple.eu:10670/1.scu4is 2023-05-15T17:02:08+02:00 Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 Bowie, A. R. Van Der Merwe, P. Queroue, Fabien Trull, Thomas Fourquez, M. Planchon, F. Sarthou, Geraldine Chever, Fanny Townsend, A. T. Obernosterer, I. Sallee, Jean-baptiste Blain, S. 2015-01-01 https://doi.org/10.5194/bg-12-4421-2015 https://archimer.ifremer.fr/doc/00276/38726/37233.pdf https://archimer.ifremer.fr/doc/00276/38726/37234.pdf https://archimer.ifremer.fr/doc/00276/38726/71319.pdf https://archimer.ifremer.fr/doc/00276/38726/71320.pdf https://archimer.ifremer.fr/doc/00276/38726/ en eng Copernicus Gesellschaft Mbh doi:10.5194/bg-12-4421-2015 10670/1.scu4is https://archimer.ifremer.fr/doc/00276/38726/37233.pdf https://archimer.ifremer.fr/doc/00276/38726/37234.pdf https://archimer.ifremer.fr/doc/00276/38726/71319.pdf https://archimer.ifremer.fr/doc/00276/38726/71320.pdf https://archimer.ifremer.fr/doc/00276/38726/ lic_creative-commons other Archimer, archive institutionnelle de l'Ifremer Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015 , Vol. 12 , N. 14 , P. 4421-4445 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2015 fttriple https://doi.org/10.5194/bg-12-4421-2015 2023-01-22T17:56:53Z Iron availability in the Southern Ocean controls phytoplankton growth, community composition and the uptake of atmospheric CO2 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 path-ways 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 bio-geochemical 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 ex-change of iron between dissolved, biogenic particulate and lithogenic particulate pools was highly dynamic in time and space, resulting in a decoupling of the iron supply ... Text Kerguelen Islands Southern Ocean Unknown Indian Kerguelen Kerguelen Islands Southern Ocean Biogeosciences 12 14 4421 4445 |
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language |
English |
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envir geo |
spellingShingle |
envir geo Bowie, A. R. Van Der Merwe, P. Queroue, Fabien Trull, Thomas Fourquez, M. Planchon, F. Sarthou, Geraldine Chever, Fanny Townsend, A. T. Obernosterer, I. Sallee, Jean-baptiste Blain, S. Iron budgets for three distinct biogeochemical sites around the Kerguelen Archipelago (Southern Ocean) during the natural fertilisation study, KEOPS-2 |
topic_facet |
envir geo |
description |
Iron availability in the Southern Ocean controls phytoplankton growth, community composition and the uptake of atmospheric CO2 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 path-ways 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 bio-geochemical 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 ex-change of iron between dissolved, biogenic particulate and lithogenic particulate pools was highly dynamic in time and space, resulting in a decoupling of the iron supply ... |
format |
Text |
author |
Bowie, A. R. Van Der Merwe, P. Queroue, Fabien Trull, Thomas Fourquez, M. Planchon, F. Sarthou, Geraldine Chever, Fanny Townsend, A. T. Obernosterer, I. Sallee, Jean-baptiste Blain, S. |
author_facet |
Bowie, A. R. Van Der Merwe, P. Queroue, Fabien Trull, Thomas Fourquez, M. Planchon, F. Sarthou, Geraldine Chever, Fanny Townsend, A. T. Obernosterer, I. Sallee, Jean-baptiste Blain, S. |
author_sort |
Bowie, A. 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 |
Copernicus Gesellschaft Mbh |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-4421-2015 https://archimer.ifremer.fr/doc/00276/38726/37233.pdf https://archimer.ifremer.fr/doc/00276/38726/37234.pdf https://archimer.ifremer.fr/doc/00276/38726/71319.pdf https://archimer.ifremer.fr/doc/00276/38726/71320.pdf https://archimer.ifremer.fr/doc/00276/38726/ |
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 |
Archimer, archive institutionnelle de l'Ifremer Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015 , Vol. 12 , N. 14 , P. 4421-4445 |
op_relation |
doi:10.5194/bg-12-4421-2015 10670/1.scu4is https://archimer.ifremer.fr/doc/00276/38726/37233.pdf https://archimer.ifremer.fr/doc/00276/38726/37234.pdf https://archimer.ifremer.fr/doc/00276/38726/71319.pdf https://archimer.ifremer.fr/doc/00276/38726/71320.pdf https://archimer.ifremer.fr/doc/00276/38726/ |
op_rights |
lic_creative-commons other |
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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1766055384130256896 |