Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring
International audience Here we test the hypothesis that winds have an important role in determining the rate of exchange of CO 2 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 i...
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.science/hal-04114620 https://doi.org/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Earth Science [SDU]Sciences of the Universe [physics] Rodgers, K. B. Aumont, O. Mikaloff Fletcher, S. E. Plancherel, Y. Bopp, L. de Boyer Montégut, C. Iudicone, D. Keeling, R. F. Madec, G. Wanninkhof, R. Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring |
topic_facet |
Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience Here we test the hypothesis that winds have an important role in determining the rate of exchange of CO 2 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 CO 2 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° 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 NO 3 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. |
author2 |
Institut de Recherche pour le Développement (IRD) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Rodgers, K. B. Aumont, O. Mikaloff Fletcher, S. E. Plancherel, Y. Bopp, L. de Boyer Montégut, C. Iudicone, D. Keeling, R. F. Madec, G. Wanninkhof, R. |
author_facet |
Rodgers, K. B. Aumont, O. Mikaloff Fletcher, S. E. Plancherel, Y. Bopp, L. de Boyer Montégut, C. Iudicone, D. Keeling, R. F. Madec, G. 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 |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-04114620 https://doi.org/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Biogeosciences https://hal.science/hal-04114620 Biogeosciences, 2014, 11, pp.4077-4098. ⟨10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 hal-04114620 https://hal.science/hal-04114620 BIBCODE: 2014BGeo.11.4077R doi:10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 |
op_doi |
https://doi.org/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 |
_version_ |
1769009416701476864 |
spelling |
ftccsdartic:oai:HAL:hal-04114620v1 2023-06-18T03:43:08+02:00 Strong sensitivity of Southern Ocean carbon uptake and nutrient cycling to wind stirring Rodgers, K. B. Aumont, O. Mikaloff Fletcher, S. E. Plancherel, Y. Bopp, L. de Boyer Montégut, C. Iudicone, D. Keeling, R. F. Madec, G. Wanninkhof, R. Institut de Recherche pour le Développement (IRD) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2014 https://hal.science/hal-04114620 https://doi.org/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 hal-04114620 https://hal.science/hal-04114620 BIBCODE: 2014BGeo.11.4077R doi:10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 Biogeosciences https://hal.science/hal-04114620 Biogeosciences, 2014, 11, pp.4077-4098. ⟨10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013⟩ Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2014 ftccsdartic https://doi.org/10.5194/bg-11-4077-201410.5194/bgd-10-15033-2013 2023-06-03T23:49:54Z International audience Here we test the hypothesis that winds have an important role in determining the rate of exchange of CO 2 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 CO 2 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° 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 NO 3 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean |