Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study
International audience The changes of midlatitude Rossby waves and cold extreme temperature events (cold spells) during warm Arctic winters are analyzed using a dry three-level quasigeostrophic model on the sphere. Two long-term simulations are compared: the first run has the observed wintertime cli...
Published in: | Journal of the Atmospheric Sciences |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-03660155 https://insu.hal.science/insu-03660155/document https://insu.hal.science/insu-03660155/file/1520-0469-JAS-D-20-0088.1.pdf https://doi.org/10.1175/JAS-D-20-0088.1 |
id |
ftuniversailles:oai:HAL:insu-03660155v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Jolly, Emilien d'Andrea, Fabio Rivière, Gwendal Fromang, Sebastien Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The changes of midlatitude Rossby waves and cold extreme temperature events (cold spells) during warm Arctic winters are analyzed using a dry three-level quasigeostrophic model on the sphere. Two long-term simulations are compared: the first run has the observed wintertime climatology, while the second run includes the composite of the global anomalies associated with the six hottest Arctic winters. A spectral analysis shows a large increase in wave amplitude for near-zero and westward phase speeds and a more moderate decrease for high eastward phase speeds. The increase in low-frequency variability (periods greater than a week) associated with the power shift to slower waves is largely responsible for an increase in midlatitude long-lasting cold spells. In midlatitude regions, in the presence of a mean warming, that increase in low-frequency variance compensates the increase of the mean temperature, resulting at places in a frequency of cold spells that remains by and large unaltered. In presence of mean cooling, both the increase in variance and the decrease in the mean temperature participate in an increased frequency of cold spells. Sensitivity experiments show that the power shift to slower waves is mainly due to the tropical anomalies that developed during those particular winters and less importantly to changes in the background flow at higher latitudes associated with the Arctic amplification pattern. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) 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)-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) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) ANR-15-JCLI-0004,GOTHAM,Globally Observed Teleconnections and their role and representation in Hierarchies of Atmospheric Models(2015) |
format |
Article in Journal/Newspaper |
author |
Jolly, Emilien d'Andrea, Fabio Rivière, Gwendal Fromang, Sebastien |
author_facet |
Jolly, Emilien d'Andrea, Fabio Rivière, Gwendal Fromang, Sebastien |
author_sort |
Jolly, Emilien |
title |
Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study |
title_short |
Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study |
title_full |
Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study |
title_fullStr |
Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study |
title_full_unstemmed |
Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study |
title_sort |
linking warm arctic winters, rossby waves, and cold spells: an idealized numerical study |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03660155 https://insu.hal.science/insu-03660155/document https://insu.hal.science/insu-03660155/file/1520-0469-JAS-D-20-0088.1.pdf https://doi.org/10.1175/JAS-D-20-0088.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0022-4928 EISSN: 1520-0469 Journal of the Atmospheric Sciences https://insu.hal.science/insu-03660155 Journal of the Atmospheric Sciences, 2021, 78, pp.2783-2799. ⟨10.1175/JAS-D-20-0088.1⟩ https://journals.ametsoc.org/view/journals/atsc/78/9/JAS-D-20-0088.1.xml |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JAS-D-20-0088.1 insu-03660155 https://insu.hal.science/insu-03660155 https://insu.hal.science/insu-03660155/document https://insu.hal.science/insu-03660155/file/1520-0469-JAS-D-20-0088.1.pdf BIBCODE: 2021JAtS.78.2783J doi:10.1175/JAS-D-20-0088.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JAS-D-20-0088.1 |
container_title |
Journal of the Atmospheric Sciences |
_version_ |
1796303721830809600 |
spelling |
ftuniversailles:oai:HAL:insu-03660155v1 2024-04-14T08:06:39+00:00 Linking warm Arctic winters, Rossby waves, and cold spells: an idealized numerical study Jolly, Emilien d'Andrea, Fabio Rivière, Gwendal Fromang, Sebastien Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) 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)-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) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) ANR-15-JCLI-0004,GOTHAM,Globally Observed Teleconnections and their role and representation in Hierarchies of Atmospheric Models(2015) 2021 https://insu.hal.science/insu-03660155 https://insu.hal.science/insu-03660155/document https://insu.hal.science/insu-03660155/file/1520-0469-JAS-D-20-0088.1.pdf https://doi.org/10.1175/JAS-D-20-0088.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JAS-D-20-0088.1 insu-03660155 https://insu.hal.science/insu-03660155 https://insu.hal.science/insu-03660155/document https://insu.hal.science/insu-03660155/file/1520-0469-JAS-D-20-0088.1.pdf BIBCODE: 2021JAtS.78.2783J doi:10.1175/JAS-D-20-0088.1 info:eu-repo/semantics/OpenAccess ISSN: 0022-4928 EISSN: 1520-0469 Journal of the Atmospheric Sciences https://insu.hal.science/insu-03660155 Journal of the Atmospheric Sciences, 2021, 78, pp.2783-2799. ⟨10.1175/JAS-D-20-0088.1⟩ https://journals.ametsoc.org/view/journals/atsc/78/9/JAS-D-20-0088.1.xml [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftuniversailles https://doi.org/10.1175/JAS-D-20-0088.1 2024-03-21T16:13:14Z International audience The changes of midlatitude Rossby waves and cold extreme temperature events (cold spells) during warm Arctic winters are analyzed using a dry three-level quasigeostrophic model on the sphere. Two long-term simulations are compared: the first run has the observed wintertime climatology, while the second run includes the composite of the global anomalies associated with the six hottest Arctic winters. A spectral analysis shows a large increase in wave amplitude for near-zero and westward phase speeds and a more moderate decrease for high eastward phase speeds. The increase in low-frequency variability (periods greater than a week) associated with the power shift to slower waves is largely responsible for an increase in midlatitude long-lasting cold spells. In midlatitude regions, in the presence of a mean warming, that increase in low-frequency variance compensates the increase of the mean temperature, resulting at places in a frequency of cold spells that remains by and large unaltered. In presence of mean cooling, both the increase in variance and the decrease in the mean temperature participate in an increased frequency of cold spells. Sensitivity experiments show that the power shift to slower waves is mainly due to the tropical anomalies that developed during those particular winters and less importantly to changes in the background flow at higher latitudes associated with the Arctic amplification pattern. Article in Journal/Newspaper Arctic Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Arctic Journal of the Atmospheric Sciences |