Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology
International audience The Antarctic Slope Front (ASF) is a fundamental feature of the subpolar Southern Ocean that is still poorly observed. In this study we build a statistical climatology of the temperature and salinity fields of the upper 380 m of the Antarctic margin. We use a comprehensive com...
Published in: | Journal of Physical Oceanography |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012/document https://hal.sorbonne-universite.fr/hal-03260012/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Seasonal%20Variation%20of%20the%20Antarctic%20Slope%20Front%20Occurrence%20and%20Position%20Estimated%20from%20an%20Interpolated%20Hydrographic%20Climatology.pdf https://doi.org/10.1175/jpo-d-20-0186.1 |
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ftceafr:oai:HAL:hal-03260012v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
Antarctica Southern Ocean Fronts In situ oceanic observations Interpolation schemes Principal components analysis [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Antarctica Southern Ocean Fronts In situ oceanic observations Interpolation schemes Principal components analysis [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Pauthenet, Etienne Sallée, Jean-Baptiste Schmidtko, Sunke Nerini, D. Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology |
topic_facet |
Antarctica Southern Ocean Fronts In situ oceanic observations Interpolation schemes Principal components analysis [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The Antarctic Slope Front (ASF) is a fundamental feature of the subpolar Southern Ocean that is still poorly observed. In this study we build a statistical climatology of the temperature and salinity fields of the upper 380 m of the Antarctic margin. We use a comprehensive compilation of observational datasets including the profiles gathered by instrumented marine mammals. The mapping method consists first of a decomposition in vertical modes of the combined temperature and salinity profiles. Then the resulting principal components are optimally interpolated on a regular grid and the monthly climatological profiles are reconstructed, providing a physically plausible representation of the ocean. The ASF is located with a contour method and a gradient method applied on the temperature field, two complementary approaches that provide a complete view of the ASF structure. The front extends from the Amundsen Sea to the eastern Weddell Sea and closely tracks the continental shelf break. It is associated with a sharp temperature gradient that is stronger in winter and weaker in summer. The emergence of the front in the Amundsen and Bellingshausen sectors appears to be seasonally variable (slightly more westward in winter than in summer). Investigation of the density gradients across the shelf break indicates a winter slowdown of the baroclinic component of the Antarctic Slope Current at the near surface, in contrast with the seasonal variability of the temperature gradient. |
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) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) |
format |
Article in Journal/Newspaper |
author |
Pauthenet, Etienne Sallée, Jean-Baptiste Schmidtko, Sunke Nerini, D. |
author_facet |
Pauthenet, Etienne Sallée, Jean-Baptiste Schmidtko, Sunke Nerini, D. |
author_sort |
Pauthenet, Etienne |
title |
Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology |
title_short |
Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology |
title_full |
Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology |
title_fullStr |
Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology |
title_full_unstemmed |
Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology |
title_sort |
seasonal variation of the antarctic slope front occurrence and position estimated from an interpolated hydrographic climatology |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.sorbonne-universite.fr/hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012/document https://hal.sorbonne-universite.fr/hal-03260012/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Seasonal%20Variation%20of%20the%20Antarctic%20Slope%20Front%20Occurrence%20and%20Position%20Estimated%20from%20an%20Interpolated%20Hydrographic%20Climatology.pdf https://doi.org/10.1175/jpo-d-20-0186.1 |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Southern Ocean Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Southern Ocean Weddell Sea |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.sorbonne-universite.fr/hal-03260012 Journal of Physical Oceanography, 2021, 51 (5), pp.1539 - 1557. ⟨10.1175/jpo-d-20-0186.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/jpo-d-20-0186.1 info:eu-repo/grantAgreement//637770/EU/Water-mass transformation and Pathways In The Weddell Sea: uncovering the dynamics of a global climate chokepoint from In-situ measurements/WAPITI hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012/document https://hal.sorbonne-universite.fr/hal-03260012/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Seasonal%20Variation%20of%20the%20Antarctic%20Slope%20Front%20Occurrence%20and%20Position%20Estimated%20from%20an%20Interpolated%20Hydrographic%20Climatology.pdf doi:10.1175/jpo-d-20-0186.1 WOS: 000655510400011 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/jpo-d-20-0186.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
51 |
container_issue |
5 |
container_start_page |
1539 |
op_container_end_page |
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spelling |
ftceafr:oai:HAL:hal-03260012v1 2024-09-15T17:39:10+00:00 Seasonal Variation of the Antarctic Slope Front Occurrence and Position Estimated from an Interpolated Hydrographic Climatology Pauthenet, Etienne Sallée, Jean-Baptiste Schmidtko, Sunke Nerini, D. 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) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) 2021 https://hal.sorbonne-universite.fr/hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012/document https://hal.sorbonne-universite.fr/hal-03260012/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Seasonal%20Variation%20of%20the%20Antarctic%20Slope%20Front%20Occurrence%20and%20Position%20Estimated%20from%20an%20Interpolated%20Hydrographic%20Climatology.pdf https://doi.org/10.1175/jpo-d-20-0186.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/jpo-d-20-0186.1 info:eu-repo/grantAgreement//637770/EU/Water-mass transformation and Pathways In The Weddell Sea: uncovering the dynamics of a global climate chokepoint from In-situ measurements/WAPITI hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012 https://hal.sorbonne-universite.fr/hal-03260012/document https://hal.sorbonne-universite.fr/hal-03260012/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Seasonal%20Variation%20of%20the%20Antarctic%20Slope%20Front%20Occurrence%20and%20Position%20Estimated%20from%20an%20Interpolated%20Hydrographic%20Climatology.pdf doi:10.1175/jpo-d-20-0186.1 WOS: 000655510400011 info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.sorbonne-universite.fr/hal-03260012 Journal of Physical Oceanography, 2021, 51 (5), pp.1539 - 1557. ⟨10.1175/jpo-d-20-0186.1⟩ Antarctica Southern Ocean Fronts In situ oceanic observations Interpolation schemes Principal components analysis [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2021 ftceafr https://doi.org/10.1175/jpo-d-20-0186.1 2024-07-22T13:15:08Z International audience The Antarctic Slope Front (ASF) is a fundamental feature of the subpolar Southern Ocean that is still poorly observed. In this study we build a statistical climatology of the temperature and salinity fields of the upper 380 m of the Antarctic margin. We use a comprehensive compilation of observational datasets including the profiles gathered by instrumented marine mammals. The mapping method consists first of a decomposition in vertical modes of the combined temperature and salinity profiles. Then the resulting principal components are optimally interpolated on a regular grid and the monthly climatological profiles are reconstructed, providing a physically plausible representation of the ocean. The ASF is located with a contour method and a gradient method applied on the temperature field, two complementary approaches that provide a complete view of the ASF structure. The front extends from the Amundsen Sea to the eastern Weddell Sea and closely tracks the continental shelf break. It is associated with a sharp temperature gradient that is stronger in winter and weaker in summer. The emergence of the front in the Amundsen and Bellingshausen sectors appears to be seasonally variable (slightly more westward in winter than in summer). Investigation of the density gradients across the shelf break indicates a winter slowdown of the baroclinic component of the Antarctic Slope Current at the near surface, in contrast with the seasonal variability of the temperature gradient. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Southern Ocean Weddell Sea HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Physical Oceanography 51 5 1539 1557 |