Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings
International audience The extreme disruptions of the wintertime stratospheric circulation during sudden stratospheric warmings (SSW) have large effects on tracer concentrations through alterations in transport. This study analyzes the changes in residual circulation and isentropic mixing associated...
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
2018
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699/document https://hal.archives-ouvertes.fr/hal-03658699/file/JGR%20Atmospheres%20-%202018%20-%20de%20la%20C%20mara%20-%20Changes%20in%20Stratospheric%20Transport%20and%20Mixing%20During%20Sudden%20Stratospheric%20Warmings.pdf https://doi.org/10.1002/2017JD028007 |
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ftunivnantes:oai:HAL:hal-03658699v1 |
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openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
sudden stratospheric warming transport and mixing Brewer-Dobson circulation effective diffusivity stratospheric dynamics potential vorticity [SDU]Sciences of the Universe [physics] |
spellingShingle |
sudden stratospheric warming transport and mixing Brewer-Dobson circulation effective diffusivity stratospheric dynamics potential vorticity [SDU]Sciences of the Universe [physics] de La Cámara, A. Abalos, M. Hitchcock, P. Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings |
topic_facet |
sudden stratospheric warming transport and mixing Brewer-Dobson circulation effective diffusivity stratospheric dynamics potential vorticity [SDU]Sciences of the Universe [physics] |
description |
International audience The extreme disruptions of the wintertime stratospheric circulation during sudden stratospheric warmings (SSW) have large effects on tracer concentrations through alterations in transport. This study analyzes the changes in residual circulation and isentropic mixing associated with SSWs, by performing composites using reanalysis (European Centre for Medium-Range Weather Forecasts Re-Analysis Interim) and simulations of the Whole Atmosphere Community Climate Model. The advective Brewer-Dobson circulation accelerates around 15 days prior to the wind reversal at 60°N, 10 hPa during the onset of SSWs. Soon afterward, it decelerates, leading to reduced advective transport into the vortex and descent over the pole, which persist for more than 2 months below 30 hPa. The isentropic mixing has a distinct signature in altitude: It is enhanced at the central date of the SSW in the midstratosphere (about 10 hPa or 800 K), and this signal is delayed and more persistent at lower altitudes. It is shown that sufficiently deep SSWs (particularly those related to Polar-night Jet Oscillation events) have a stronger response in the Brewer-Dobson circulation and mixing. In particular, both the polar downwelling and the tropical upwelling are anomalously weak in the lower stratosphere for 90 days after the onset of Polar-night Jet Oscillation events. The redistribution of potential vorticity during the life cycle of SSWs is discussed due to its relevance for the stratospheric circulation. It is shown that the diffusive flux of potential vorticity, calculated in equivalent latitude coordinates, remains anomalously high in the lower stratosphere, a feature that is not seen in more conventional advective eddy fluxes across latitude circles. |
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) |
format |
Article in Journal/Newspaper |
author |
de La Cámara, A. Abalos, M. Hitchcock, P. |
author_facet |
de La Cámara, A. Abalos, M. Hitchcock, P. |
author_sort |
de La Cámara, A. |
title |
Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings |
title_short |
Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings |
title_full |
Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings |
title_fullStr |
Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings |
title_full_unstemmed |
Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings |
title_sort |
changes in stratospheric transport and mixing during sudden stratospheric warmings |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.archives-ouvertes.fr/hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699/document https://hal.archives-ouvertes.fr/hal-03658699/file/JGR%20Atmospheres%20-%202018%20-%20de%20la%20C%20mara%20-%20Changes%20in%20Stratospheric%20Transport%20and%20Mixing%20During%20Sudden%20Stratospheric%20Warmings.pdf https://doi.org/10.1002/2017JD028007 |
genre |
polar night |
genre_facet |
polar night |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.archives-ouvertes.fr/hal-03658699 Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2018, 123, pp.3356-3373. ⟨10.1002/2017JD028007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JD028007 hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699/document https://hal.archives-ouvertes.fr/hal-03658699/file/JGR%20Atmospheres%20-%202018%20-%20de%20la%20C%20mara%20-%20Changes%20in%20Stratospheric%20Transport%20and%20Mixing%20During%20Sudden%20Stratospheric%20Warmings.pdf BIBCODE: 2018JGRD.123.3356D doi:10.1002/2017JD028007 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2017JD028007 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
7 |
container_start_page |
3356 |
op_container_end_page |
3373 |
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1766172021140488192 |
spelling |
ftunivnantes:oai:HAL:hal-03658699v1 2023-05-15T18:02:14+02:00 Changes in Stratospheric Transport and Mixing During Sudden Stratospheric Warmings de La Cámara, A. Abalos, M. Hitchcock, P. 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) 2018 https://hal.archives-ouvertes.fr/hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699/document https://hal.archives-ouvertes.fr/hal-03658699/file/JGR%20Atmospheres%20-%202018%20-%20de%20la%20C%20mara%20-%20Changes%20in%20Stratospheric%20Transport%20and%20Mixing%20During%20Sudden%20Stratospheric%20Warmings.pdf https://doi.org/10.1002/2017JD028007 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JD028007 hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699 https://hal.archives-ouvertes.fr/hal-03658699/document https://hal.archives-ouvertes.fr/hal-03658699/file/JGR%20Atmospheres%20-%202018%20-%20de%20la%20C%20mara%20-%20Changes%20in%20Stratospheric%20Transport%20and%20Mixing%20During%20Sudden%20Stratospheric%20Warmings.pdf BIBCODE: 2018JGRD.123.3356D doi:10.1002/2017JD028007 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.archives-ouvertes.fr/hal-03658699 Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2018, 123, pp.3356-3373. ⟨10.1002/2017JD028007⟩ sudden stratospheric warming transport and mixing Brewer-Dobson circulation effective diffusivity stratospheric dynamics potential vorticity [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftunivnantes https://doi.org/10.1002/2017JD028007 2022-10-11T23:16:08Z International audience The extreme disruptions of the wintertime stratospheric circulation during sudden stratospheric warmings (SSW) have large effects on tracer concentrations through alterations in transport. This study analyzes the changes in residual circulation and isentropic mixing associated with SSWs, by performing composites using reanalysis (European Centre for Medium-Range Weather Forecasts Re-Analysis Interim) and simulations of the Whole Atmosphere Community Climate Model. The advective Brewer-Dobson circulation accelerates around 15 days prior to the wind reversal at 60°N, 10 hPa during the onset of SSWs. Soon afterward, it decelerates, leading to reduced advective transport into the vortex and descent over the pole, which persist for more than 2 months below 30 hPa. The isentropic mixing has a distinct signature in altitude: It is enhanced at the central date of the SSW in the midstratosphere (about 10 hPa or 800 K), and this signal is delayed and more persistent at lower altitudes. It is shown that sufficiently deep SSWs (particularly those related to Polar-night Jet Oscillation events) have a stronger response in the Brewer-Dobson circulation and mixing. In particular, both the polar downwelling and the tropical upwelling are anomalously weak in the lower stratosphere for 90 days after the onset of Polar-night Jet Oscillation events. The redistribution of potential vorticity during the life cycle of SSWs is discussed due to its relevance for the stratospheric circulation. It is shown that the diffusive flux of potential vorticity, calculated in equivalent latitude coordinates, remains anomalously high in the lower stratosphere, a feature that is not seen in more conventional advective eddy fluxes across latitude circles. Article in Journal/Newspaper polar night Université de Nantes: HAL-UNIV-NANTES Journal of Geophysical Research: Atmospheres 123 7 3356 3373 |