Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current
International audience An eddying global model is used to study the characteristics of the Antarctic Circumpolar Current (ACC) in a streamline-following framework. In the upper layers, the meridional circulation across streamlines agrees with the theoretical view: an equatorward mean flow partially...
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Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2007
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Online Access: | https://hal.archives-ouvertes.fr/hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133/document https://hal.archives-ouvertes.fr/hal-00331133/file/osd-4-653-2007.pdf https://doi.org/10.5194/osd-4-653-2007 |
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ftccsdartic:oai:HAL:hal-00331133v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Tréguier, Anne-Marie England, Matthew H. Rintoul, Stephen R. Madec, Gurvan Le Sommer, Julien Molines, Jean-Marc Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience An eddying global model is used to study the characteristics of the Antarctic Circumpolar Current (ACC) in a streamline-following framework. In the upper layers, the meridional circulation across streamlines agrees with the theoretical view: an equatorward mean flow partially cancelled by a poleward eddy mass flux. The same calculation in a zonal average gives a completely different view and underestimates the eddy effects. Two model simulations, in which the buoyancy forcing above the ACC changes from positive to negative, suggest that the relationship between the residual meridional circulation and the surface buoyancy flux is not as straightforward as assumed by some recent theoretical studies: even the sign of the residual circulation cannot be inferred from the buoyancy forcing. Heat and salt transports by the time-mean flow are important even in the streamline framework. Streamline-averaged, two-dimensional models cannot account quantitatively for the complex three-dimensional structure of the ACC. Heat and salt are balanced in the ACC, the model drift being small, but the nonlinearity of the equation of state cannot be ignored in the density balance. |
author2 |
Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) University of New South Wales Sydney (UNSW) CSIRO Wealth from Oceans National Research Flagship and Antarctic Climate and Ecosystems CRC Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 Paris) 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) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) |
format |
Article in Journal/Newspaper |
author |
Tréguier, Anne-Marie England, Matthew H. Rintoul, Stephen R. Madec, Gurvan Le Sommer, Julien Molines, Jean-Marc |
author_facet |
Tréguier, Anne-Marie England, Matthew H. Rintoul, Stephen R. Madec, Gurvan Le Sommer, Julien Molines, Jean-Marc |
author_sort |
Tréguier, Anne-Marie |
title |
Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current |
title_short |
Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current |
title_full |
Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current |
title_fullStr |
Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current |
title_full_unstemmed |
Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current |
title_sort |
southern ocean overturning across streamlines in an eddying simulation of the antarctic circumpolar current |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.archives-ouvertes.fr/hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133/document https://hal.archives-ouvertes.fr/hal-00331133/file/osd-4-653-2007.pdf https://doi.org/10.5194/osd-4-653-2007 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 1812-0806 EISSN: 1812-0822 Ocean Science Discussions https://hal.archives-ouvertes.fr/hal-00331133 Ocean Science Discussions, European Geosciences Union, 2007, 4 (4), pp.653-698. ⟨10.5194/osd-4-653-2007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/osd-4-653-2007 hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133/document https://hal.archives-ouvertes.fr/hal-00331133/file/osd-4-653-2007.pdf doi:10.5194/osd-4-653-2007 IRD: PAR00002829 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/osd-4-653-2007 |
_version_ |
1766265530319110144 |
spelling |
ftccsdartic:oai:HAL:hal-00331133v1 2023-05-15T13:57:43+02:00 Southern Ocean overturning across streamlines in an eddying simulation of the Antarctic Circumpolar Current Tréguier, Anne-Marie England, Matthew H. Rintoul, Stephen R. Madec, Gurvan Le Sommer, Julien Molines, Jean-Marc Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) University of New South Wales Sydney (UNSW) CSIRO Wealth from Oceans National Research Flagship and Antarctic Climate and Ecosystems CRC Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 Paris) 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) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) 2007-07-17 https://hal.archives-ouvertes.fr/hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133/document https://hal.archives-ouvertes.fr/hal-00331133/file/osd-4-653-2007.pdf https://doi.org/10.5194/osd-4-653-2007 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/osd-4-653-2007 hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133 https://hal.archives-ouvertes.fr/hal-00331133/document https://hal.archives-ouvertes.fr/hal-00331133/file/osd-4-653-2007.pdf doi:10.5194/osd-4-653-2007 IRD: PAR00002829 info:eu-repo/semantics/OpenAccess ISSN: 1812-0806 EISSN: 1812-0822 Ocean Science Discussions https://hal.archives-ouvertes.fr/hal-00331133 Ocean Science Discussions, European Geosciences Union, 2007, 4 (4), pp.653-698. ⟨10.5194/osd-4-653-2007⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftccsdartic https://doi.org/10.5194/osd-4-653-2007 2021-12-05T03:54:37Z International audience An eddying global model is used to study the characteristics of the Antarctic Circumpolar Current (ACC) in a streamline-following framework. In the upper layers, the meridional circulation across streamlines agrees with the theoretical view: an equatorward mean flow partially cancelled by a poleward eddy mass flux. The same calculation in a zonal average gives a completely different view and underestimates the eddy effects. Two model simulations, in which the buoyancy forcing above the ACC changes from positive to negative, suggest that the relationship between the residual meridional circulation and the surface buoyancy flux is not as straightforward as assumed by some recent theoretical studies: even the sign of the residual circulation cannot be inferred from the buoyancy forcing. Heat and salt transports by the time-mean flow are important even in the streamline framework. Streamline-averaged, two-dimensional models cannot account quantitatively for the complex three-dimensional structure of the ACC. Heat and salt are balanced in the ACC, the model drift being small, but the nonlinearity of the equation of state cannot be ignored in the density balance. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Southern Ocean The Antarctic |