Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results
The Kerguelen Plateau region in the Indian sector of the Southern Ocean supports annually a large-scale phytoplankton bloom which is naturally fertilized with iron. As part of the second Kerguelen Ocean and Plateau compared Study expedition (KEOPS2) in austral spring (OctoberNovember 2011), one CARb...
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fttriple:oai:gotriple.eu:10670/1.p0rbji 2023-05-15T18:25:22+02:00 Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results Merlivat, L. Boutin, J. D'Ovidio, F. 2015-01-01 https://doi.org/10.5194/bg-12-3513-2015 https://archimer.ifremer.fr/doc/00291/40254/38633.pdf https://archimer.ifremer.fr/doc/00291/40254/ en eng Copernicus Gesellschaft Mbh doi:10.5194/bg-12-3513-2015 10670/1.p0rbji https://archimer.ifremer.fr/doc/00291/40254/38633.pdf https://archimer.ifremer.fr/doc/00291/40254/ other Archimer, archive institutionnelle de l'Ifremer Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015 , Vol. 12 , N. 11 , P. 3513-3524 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2015 fttriple https://doi.org/10.5194/bg-12-3513-2015 2023-01-22T17:57:23Z The Kerguelen Plateau region in the Indian sector of the Southern Ocean supports annually a large-scale phytoplankton bloom which is naturally fertilized with iron. As part of the second Kerguelen Ocean and Plateau compared Study expedition (KEOPS2) in austral spring (OctoberNovember 2011), one CARbon Interface OCean Atmosphere (CARIOCA) buoy was deployed east of the Kerguelen Plateau. It drifted eastward downstream along the Kerguelen plume. Hourly surface measurements of pCO(2), O-2 and ancillary observations were collected between 1 November 2011 and 12 February 2012 with the aim of characterizing the spatial and temporal variability of the biological net community production, NCP, downstream the Kerguelen Plateau, assessing the impact of iron-induced productivity on the biological inorganic carbon consumption and consequently on the CO2 flux exchanged at the air-sea interface. The trajectory of the buoy up to mid-December was within the longitude range 72-83 degrees E, close to the polar front and then in the polar frontal zone, PFZ, up to 97 degrees E. From 17 November to 16 December, the buoy drifted within the Kerguelen plume following a filament carrying dissolved iron, DFe, for a total distance of 700 km. In the first part of the trajectory of the buoy, within the iron plume, the ocean surface waters were always a sink for CO2 and a source for O-2, with fluxes of respective mean values equal to -8 mmol CO2 and +38 mmol O-2 m(-2) d(-1). To the east, as the buoy escaped the iron-enriched filament, the fluxes were in the opposite direction, with respective mean values of +5 mmol CO2 and 48 mmol O-2 m(-2) d(-1). These numbers clearly indicate the strong impact of biological processes on the biogeochemistry in the surface waters within the Kerguelen plume in November-mid-December, while it is undetectable to the east in the PFZ from mid-December to mid-February. While the buoy follows the Feenriched filament, simultaneous observations of dissolved inorganic carbon (DIC) and dissolved oxygen (O-2) highlight ... Text Southern Ocean Unknown Austral Indian Kerguelen Southern Ocean Biogeosciences 12 11 3513 3524 |
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fttriple |
language |
English |
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envir geo |
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envir geo Merlivat, L. Boutin, J. D'Ovidio, F. Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results |
topic_facet |
envir geo |
description |
The Kerguelen Plateau region in the Indian sector of the Southern Ocean supports annually a large-scale phytoplankton bloom which is naturally fertilized with iron. As part of the second Kerguelen Ocean and Plateau compared Study expedition (KEOPS2) in austral spring (OctoberNovember 2011), one CARbon Interface OCean Atmosphere (CARIOCA) buoy was deployed east of the Kerguelen Plateau. It drifted eastward downstream along the Kerguelen plume. Hourly surface measurements of pCO(2), O-2 and ancillary observations were collected between 1 November 2011 and 12 February 2012 with the aim of characterizing the spatial and temporal variability of the biological net community production, NCP, downstream the Kerguelen Plateau, assessing the impact of iron-induced productivity on the biological inorganic carbon consumption and consequently on the CO2 flux exchanged at the air-sea interface. The trajectory of the buoy up to mid-December was within the longitude range 72-83 degrees E, close to the polar front and then in the polar frontal zone, PFZ, up to 97 degrees E. From 17 November to 16 December, the buoy drifted within the Kerguelen plume following a filament carrying dissolved iron, DFe, for a total distance of 700 km. In the first part of the trajectory of the buoy, within the iron plume, the ocean surface waters were always a sink for CO2 and a source for O-2, with fluxes of respective mean values equal to -8 mmol CO2 and +38 mmol O-2 m(-2) d(-1). To the east, as the buoy escaped the iron-enriched filament, the fluxes were in the opposite direction, with respective mean values of +5 mmol CO2 and 48 mmol O-2 m(-2) d(-1). These numbers clearly indicate the strong impact of biological processes on the biogeochemistry in the surface waters within the Kerguelen plume in November-mid-December, while it is undetectable to the east in the PFZ from mid-December to mid-February. While the buoy follows the Feenriched filament, simultaneous observations of dissolved inorganic carbon (DIC) and dissolved oxygen (O-2) highlight ... |
format |
Text |
author |
Merlivat, L. Boutin, J. D'Ovidio, F. |
author_facet |
Merlivat, L. Boutin, J. D'Ovidio, F. |
author_sort |
Merlivat, L. |
title |
Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results |
title_short |
Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results |
title_full |
Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results |
title_fullStr |
Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results |
title_full_unstemmed |
Carbon, oxygen and biological productivity in the Southern Ocean in and out the Kerguelen plume: CARIOCA drifter results |
title_sort |
carbon, oxygen and biological productivity in the southern ocean in and out the kerguelen plume: carioca drifter results |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-3513-2015 https://archimer.ifremer.fr/doc/00291/40254/38633.pdf https://archimer.ifremer.fr/doc/00291/40254/ |
geographic |
Austral Indian Kerguelen Southern Ocean |
geographic_facet |
Austral Indian Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Archimer, archive institutionnelle de l'Ifremer Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015 , Vol. 12 , N. 11 , P. 3513-3524 |
op_relation |
doi:10.5194/bg-12-3513-2015 10670/1.p0rbji https://archimer.ifremer.fr/doc/00291/40254/38633.pdf https://archimer.ifremer.fr/doc/00291/40254/ |
op_rights |
other |
op_doi |
https://doi.org/10.5194/bg-12-3513-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
11 |
container_start_page |
3513 |
op_container_end_page |
3524 |
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1766206788262166528 |