Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry
International audience A novel multi-satellite product is used to shed light on the sea surface height seasonal cycle and associated geostrophic circulation in the subpolar Southern Ocean. We find three main modes of variability governing the Sea Level Anomaly seasonal cycle, all of them primarily g...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://insu.hal.science/insu-03746446 https://insu.hal.science/insu-03746446/document https://insu.hal.science/insu-03746446/file/JGR%20Oceans%20-%202022%20-%20Auger%20-%20Subpolar%20Southern%20Ocean%20Seasonal%20Variability%20of%20the%20Geostrophic%20Circulation%20From%20Multi%25u2010Mission.pdf https://doi.org/10.1029/2021JC018096 |
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ftuniversailles:oai:HAL:insu-03746446v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
Southern Ocean seasonal cycle ocean circulation satellite altimetry [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Southern Ocean seasonal cycle ocean circulation satellite altimetry [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Auger, Matthis Sallée, Jean-Baptiste Prandi, Pierre Naveira Garabato, Alberto C. Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry |
topic_facet |
Southern Ocean seasonal cycle ocean circulation satellite altimetry [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience A novel multi-satellite product is used to shed light on the sea surface height seasonal cycle and associated geostrophic circulation in the subpolar Southern Ocean. We find three main modes of variability governing the Sea Level Anomaly seasonal cycle, all of them primarily governed by wind forcing. The main mode of seasonal variability is associated with the seasonality of the main subpolar gyres governed by large-scale wind stress curl, qualitatively consistent with Sverdrup dynamics. The second seasonal mode is related to the Antarctic Slope Current (ASC), governed by the coastal easterlies, with a rapid circumpolar propagation of anomalous sea-level along the continental slope that is dynamically consistent with the so-called Southern Mode. The first two modes induce an acceleration of the gyres and the ASC in winter. The third seasonal mode appears to be driven by sea ice-modulated surface stress and induces an offshore extension of the ASC from autumn to winter. |
author2 |
Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Collecte Localisation Satellites Toulouse (CLS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National d'Études Spatiales Toulouse (CNES) Ocean and Earth Science Southampton University of Southampton-National Oceanography Centre (NOC) |
format |
Article in Journal/Newspaper |
author |
Auger, Matthis Sallée, Jean-Baptiste Prandi, Pierre Naveira Garabato, Alberto C. |
author_facet |
Auger, Matthis Sallée, Jean-Baptiste Prandi, Pierre Naveira Garabato, Alberto C. |
author_sort |
Auger, Matthis |
title |
Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry |
title_short |
Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry |
title_full |
Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry |
title_fullStr |
Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry |
title_full_unstemmed |
Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry |
title_sort |
subpolar southern ocean seasonal variability of the geostrophic circulation from multi-mission satellite altimetry |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03746446 https://insu.hal.science/insu-03746446/document https://insu.hal.science/insu-03746446/file/JGR%20Oceans%20-%202022%20-%20Auger%20-%20Subpolar%20Southern%20Ocean%20Seasonal%20Variability%20of%20the%20Geostrophic%20Circulation%20From%20Multi%25u2010Mission.pdf https://doi.org/10.1029/2021JC018096 |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03746446 Journal of Geophysical Research. Oceans, 2022, 127, ⟨10.1029/2021JC018096⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JC018096 insu-03746446 https://insu.hal.science/insu-03746446 https://insu.hal.science/insu-03746446/document https://insu.hal.science/insu-03746446/file/JGR%20Oceans%20-%202022%20-%20Auger%20-%20Subpolar%20Southern%20Ocean%20Seasonal%20Variability%20of%20the%20Geostrophic%20Circulation%20From%20Multi%25u2010Mission.pdf BIBCODE: 2022JGRC.12718096A doi:10.1029/2021JC018096 WOS: 000811899000001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021JC018096 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
6 |
_version_ |
1799470024600059904 |
spelling |
ftuniversailles:oai:HAL:insu-03746446v1 2024-05-19T07:32:04+00:00 Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi-Mission Satellite Altimetry Auger, Matthis Sallée, Jean-Baptiste Prandi, Pierre Naveira Garabato, Alberto C. Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Collecte Localisation Satellites Toulouse (CLS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National d'Études Spatiales Toulouse (CNES) Ocean and Earth Science Southampton University of Southampton-National Oceanography Centre (NOC) 2022 https://insu.hal.science/insu-03746446 https://insu.hal.science/insu-03746446/document https://insu.hal.science/insu-03746446/file/JGR%20Oceans%20-%202022%20-%20Auger%20-%20Subpolar%20Southern%20Ocean%20Seasonal%20Variability%20of%20the%20Geostrophic%20Circulation%20From%20Multi%25u2010Mission.pdf https://doi.org/10.1029/2021JC018096 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JC018096 insu-03746446 https://insu.hal.science/insu-03746446 https://insu.hal.science/insu-03746446/document https://insu.hal.science/insu-03746446/file/JGR%20Oceans%20-%202022%20-%20Auger%20-%20Subpolar%20Southern%20Ocean%20Seasonal%20Variability%20of%20the%20Geostrophic%20Circulation%20From%20Multi%25u2010Mission.pdf BIBCODE: 2022JGRC.12718096A doi:10.1029/2021JC018096 WOS: 000811899000001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03746446 Journal of Geophysical Research. Oceans, 2022, 127, ⟨10.1029/2021JC018096⟩ Southern Ocean seasonal cycle ocean circulation satellite altimetry [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2022 ftuniversailles https://doi.org/10.1029/2021JC018096 2024-04-25T00:21:44Z International audience A novel multi-satellite product is used to shed light on the sea surface height seasonal cycle and associated geostrophic circulation in the subpolar Southern Ocean. We find three main modes of variability governing the Sea Level Anomaly seasonal cycle, all of them primarily governed by wind forcing. The main mode of seasonal variability is associated with the seasonality of the main subpolar gyres governed by large-scale wind stress curl, qualitatively consistent with Sverdrup dynamics. The second seasonal mode is related to the Antarctic Slope Current (ASC), governed by the coastal easterlies, with a rapid circumpolar propagation of anomalous sea-level along the continental slope that is dynamically consistent with the so-called Southern Mode. The first two modes induce an acceleration of the gyres and the ASC in winter. The third seasonal mode appears to be driven by sea ice-modulated surface stress and induces an offshore extension of the ASC from autumn to winter. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Journal of Geophysical Research: Oceans 127 6 |