Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring
Here we test the hypothesis that winds have an important role in determining the rate of exchange of CO2 between the atmosphere and ocean through wind stirring over the Southern Ocean. This is tested with a sensitivity study using an ad hoc parameterization of wind stirring in an ocean carbon cycle...
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ftarchimer:oai:archimer.ifremer.fr:32236 2023-05-15T18:24:16+02:00 Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring Rodgers, K. B. Aumont, Olivier Fletcher, S. E. Mikaloff Plancherel, Y. Bopp, L. De Boyer Montegut, Clement Iudicone, D. Keeling, R. F. Madec, Gerard Wanninkhof, R. 2014 application/pdf https://archimer.ifremer.fr/doc/00211/32236/30684.pdf https://doi.org/10.5194/bg-11-4077-2014 https://archimer.ifremer.fr/doc/00211/32236/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00211/32236/30684.pdf doi:10.5194/bg-11-4077-2014 https://archimer.ifremer.fr/doc/00211/32236/ Author(s) 2014. CC Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use CC-BY Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2014 , Vol. 11 , N. 15 , P. 4077-4098 text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.5194/bg-11-4077-2014 2021-09-23T20:24:54Z Here we test the hypothesis that winds have an important role in determining the rate of exchange of CO2 between the atmosphere and ocean through wind stirring over the Southern Ocean. This is tested with a sensitivity study using an ad hoc parameterization of wind stirring in an ocean carbon cycle model, where the objective is to identify the way in which perturbations to the vertical density structure of the planetary boundary in the ocean impacts the carbon cycle and ocean biogeochemistry. Wind stirring leads to reduced uptake of CO2 by the Southern Ocean over the period 2000-2006, with a relative reduction with wind stirring on the order of 0.9 Pg C yr(-1) over the region south of 45 degrees S. This impacts not only the mean carbon uptake, but also the phasing of the seasonal cycle of carbon and other ocean biogeochemical tracers. Enhanced wind stirring delays the seasonal onset of stratification, and this has large impacts on both entrainment and the biological pump. It is also found that there is a strong reduction on the order of 25-30% in the concentrations of NO3 exported in Subantarctic Mode Water (SAMW) to wind stirring. This finds expression not only locally over the Southern Ocean, but also over larger scales through the impact on advected nutrients. In summary, the large sensitivity identified with the ad hoc wind stirring parameterization offers support for the importance of wind stirring for global ocean biogeochemistry through its impact over the Southern Ocean. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Biogeosciences 11 15 4077 4098 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Here we test the hypothesis that winds have an important role in determining the rate of exchange of CO2 between the atmosphere and ocean through wind stirring over the Southern Ocean. This is tested with a sensitivity study using an ad hoc parameterization of wind stirring in an ocean carbon cycle model, where the objective is to identify the way in which perturbations to the vertical density structure of the planetary boundary in the ocean impacts the carbon cycle and ocean biogeochemistry. Wind stirring leads to reduced uptake of CO2 by the Southern Ocean over the period 2000-2006, with a relative reduction with wind stirring on the order of 0.9 Pg C yr(-1) over the region south of 45 degrees S. This impacts not only the mean carbon uptake, but also the phasing of the seasonal cycle of carbon and other ocean biogeochemical tracers. Enhanced wind stirring delays the seasonal onset of stratification, and this has large impacts on both entrainment and the biological pump. It is also found that there is a strong reduction on the order of 25-30% in the concentrations of NO3 exported in Subantarctic Mode Water (SAMW) to wind stirring. This finds expression not only locally over the Southern Ocean, but also over larger scales through the impact on advected nutrients. In summary, the large sensitivity identified with the ad hoc wind stirring parameterization offers support for the importance of wind stirring for global ocean biogeochemistry through its impact over the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Rodgers, K. B. Aumont, Olivier Fletcher, S. E. Mikaloff Plancherel, Y. Bopp, L. De Boyer Montegut, Clement Iudicone, D. Keeling, R. F. Madec, Gerard Wanninkhof, R. |
spellingShingle |
Rodgers, K. B. Aumont, Olivier Fletcher, S. E. Mikaloff Plancherel, Y. Bopp, L. De Boyer Montegut, Clement Iudicone, D. Keeling, R. F. Madec, Gerard Wanninkhof, R. Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
author_facet |
Rodgers, K. B. Aumont, Olivier Fletcher, S. E. Mikaloff Plancherel, Y. Bopp, L. De Boyer Montegut, Clement Iudicone, D. Keeling, R. F. Madec, Gerard Wanninkhof, R. |
author_sort |
Rodgers, K. B. |
title |
Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
title_short |
Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
title_full |
Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
title_fullStr |
Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
title_full_unstemmed |
Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
title_sort |
strong sensitivity of southern ocean carbon uptake and nutrient cycling to wind stirring |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00211/32236/30684.pdf https://doi.org/10.5194/bg-11-4077-2014 https://archimer.ifremer.fr/doc/00211/32236/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2014 , Vol. 11 , N. 15 , P. 4077-4098 |
op_relation |
https://archimer.ifremer.fr/doc/00211/32236/30684.pdf doi:10.5194/bg-11-4077-2014 https://archimer.ifremer.fr/doc/00211/32236/ |
op_rights |
Author(s) 2014. CC Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-11-4077-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
15 |
container_start_page |
4077 |
op_container_end_page |
4098 |
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1766204673707999232 |