Relationship between weather regimes and atmospheric rivers in East Antarctica.
International audience Here, we define weather regimes in the East Antarctica—Southern Ocean sector based on daily anomalies of 700 hPa geopotential height derived from ERA5 reanalysis during 1979–2018. Most regimes and their preferred transitions depict synoptic-scale disturbances propagating eastw...
Published in: | Journal of Geophysical Research: Atmospheres |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.science/hal-03498573 https://hal.science/hal-03498573/document https://hal.science/hal-03498573/file/DDUAR_draft_final.pdf https://doi.org/10.1029/2021JD035294 |
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ftunivnantes:oai:HAL:hal-03498573v1 |
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openpolar |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Pohl, Benjamin Favier, Vincent Wille, Jonathan Udy, Danielle G. Vance, Tessa R. Pergaud, Julien Dutrievoz, Niels Blanchet, Juliette Kittel, Christoph Amory, Charles Krinner, Gerhard Codron, Francis Relationship between weather regimes and atmospheric rivers in East Antarctica. |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Here, we define weather regimes in the East Antarctica—Southern Ocean sector based on daily anomalies of 700 hPa geopotential height derived from ERA5 reanalysis during 1979–2018. Most regimes and their preferred transitions depict synoptic-scale disturbances propagating eastwards off the Antarctic coastline. While regime sequences are generally short, their interannual variability is strongly driven by the polarity of the Southern Annular Mode (SAM). Regime occurrences are then intersected with atmospheric rivers (ARs) detected over the same region and period. ARs are equiprobable throughout the year, but clearly concentrate during regimes associated with a strong atmospheric ridges/blockings on the eastern part of the domain, which act to channel meridional advection of heat and moisture from the lower latitudes towards Antarctica. Both regimes and ARs significantly shape climate variability in Antarctica. Regimes favorable to AR occurrences are associated with anomalously warm and humid conditions in coastal Antarctica and, to a lesser extent, the hinterland parts of the Antarctic plateau. These anomalies are strongly enhanced during AR events, with warmer anomalies and dramatically amplified snowfall amounts. Large-scale conditions favoring AR development are finally explored. They show weak dependency to the SAM, but particularly strong atmospheric ridges/blockings over the Southern Ocean appear as the most favorable pattern, in which ARs can be embedded, and to which they contribute. |
author2 |
Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Institute for Marine and Antarctic Studies Hobart (IMAS) University of Tasmania Hobart, Australia (UTAS) ARC Centre of Excellence for Climate Extremes Laboratory of Climatology Université de Liège Océan et variabilité du climat (VARCLIM) 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) ANR-20-CE01-0013,ARCA,Climatologie des rivières atmosphériques en Antarctique(2020) |
format |
Article in Journal/Newspaper |
author |
Pohl, Benjamin Favier, Vincent Wille, Jonathan Udy, Danielle G. Vance, Tessa R. Pergaud, Julien Dutrievoz, Niels Blanchet, Juliette Kittel, Christoph Amory, Charles Krinner, Gerhard Codron, Francis |
author_facet |
Pohl, Benjamin Favier, Vincent Wille, Jonathan Udy, Danielle G. Vance, Tessa R. Pergaud, Julien Dutrievoz, Niels Blanchet, Juliette Kittel, Christoph Amory, Charles Krinner, Gerhard Codron, Francis |
author_sort |
Pohl, Benjamin |
title |
Relationship between weather regimes and atmospheric rivers in East Antarctica. |
title_short |
Relationship between weather regimes and atmospheric rivers in East Antarctica. |
title_full |
Relationship between weather regimes and atmospheric rivers in East Antarctica. |
title_fullStr |
Relationship between weather regimes and atmospheric rivers in East Antarctica. |
title_full_unstemmed |
Relationship between weather regimes and atmospheric rivers in East Antarctica. |
title_sort |
relationship between weather regimes and atmospheric rivers in east antarctica. |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03498573 https://hal.science/hal-03498573/document https://hal.science/hal-03498573/file/DDUAR_draft_final.pdf https://doi.org/10.1029/2021JD035294 |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03498573 Journal of Geophysical Research: Atmospheres, 2021, 126 (24), pp.e2021JD035294. ⟨10.1029/2021JD035294⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035294 hal-03498573 https://hal.science/hal-03498573 https://hal.science/hal-03498573/document https://hal.science/hal-03498573/file/DDUAR_draft_final.pdf doi:10.1029/2021JD035294 WOS: 000735878700016 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021JD035294 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
24 |
_version_ |
1766213527387766784 |
spelling |
ftunivnantes:oai:HAL:hal-03498573v1 2023-05-15T13:45:07+02:00 Relationship between weather regimes and atmospheric rivers in East Antarctica. Pohl, Benjamin Favier, Vincent Wille, Jonathan Udy, Danielle G. Vance, Tessa R. Pergaud, Julien Dutrievoz, Niels Blanchet, Juliette Kittel, Christoph Amory, Charles Krinner, Gerhard Codron, Francis Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Institute for Marine and Antarctic Studies Hobart (IMAS) University of Tasmania Hobart, Australia (UTAS) ARC Centre of Excellence for Climate Extremes Laboratory of Climatology Université de Liège Océan et variabilité du climat (VARCLIM) 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) ANR-20-CE01-0013,ARCA,Climatologie des rivières atmosphériques en Antarctique(2020) 2021-12-27 https://hal.science/hal-03498573 https://hal.science/hal-03498573/document https://hal.science/hal-03498573/file/DDUAR_draft_final.pdf https://doi.org/10.1029/2021JD035294 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035294 hal-03498573 https://hal.science/hal-03498573 https://hal.science/hal-03498573/document https://hal.science/hal-03498573/file/DDUAR_draft_final.pdf doi:10.1029/2021JD035294 WOS: 000735878700016 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03498573 Journal of Geophysical Research: Atmospheres, 2021, 126 (24), pp.e2021JD035294. ⟨10.1029/2021JD035294⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1029/2021JD035294 2023-03-01T01:57:37Z International audience Here, we define weather regimes in the East Antarctica—Southern Ocean sector based on daily anomalies of 700 hPa geopotential height derived from ERA5 reanalysis during 1979–2018. Most regimes and their preferred transitions depict synoptic-scale disturbances propagating eastwards off the Antarctic coastline. While regime sequences are generally short, their interannual variability is strongly driven by the polarity of the Southern Annular Mode (SAM). Regime occurrences are then intersected with atmospheric rivers (ARs) detected over the same region and period. ARs are equiprobable throughout the year, but clearly concentrate during regimes associated with a strong atmospheric ridges/blockings on the eastern part of the domain, which act to channel meridional advection of heat and moisture from the lower latitudes towards Antarctica. Both regimes and ARs significantly shape climate variability in Antarctica. Regimes favorable to AR occurrences are associated with anomalously warm and humid conditions in coastal Antarctica and, to a lesser extent, the hinterland parts of the Antarctic plateau. These anomalies are strongly enhanced during AR events, with warmer anomalies and dramatically amplified snowfall amounts. Large-scale conditions favoring AR development are finally explored. They show weak dependency to the SAM, but particularly strong atmospheric ridges/blockings over the Southern Ocean appear as the most favorable pattern, in which ARs can be embedded, and to which they contribute. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean The Antarctic East Antarctica Journal of Geophysical Research: Atmospheres 126 24 |