Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections
International audience Over middle and higher latitudes of the Southern Hemisphere, intense mesoscale cyclonic vortices that develop in cold-air outbreaks (cold-air mesocyclones) occur frequently during transition season months. In this study, previously published mesocyclone inventories for March-A...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2009
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Subjects: | |
Online Access: | https://hal.science/hal-00760025 https://hal.science/hal-00760025/document https://hal.science/hal-00760025/file/2009JD011995.pdf https://doi.org/10.1029/2009JD011995 |
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ftmuseumnhn:oai:HAL:hal-00760025v1 |
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openpolar |
institution |
Open Polar |
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Muséum National d'Histoire Naturelle (MNHM): HAL |
op_collection_id |
ftmuseumnhn |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU]Sciences of the Universe [physics] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU]Sciences of the Universe [physics] Claud, Chantal Carleton, Andrew M. Duchiron, Bertrand Terray, Pascal Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU]Sciences of the Universe [physics] |
description |
International audience Over middle and higher latitudes of the Southern Hemisphere, intense mesoscale cyclonic vortices that develop in cold-air outbreaks (cold-air mesocyclones) occur frequently during transition season months. In this study, previously published mesocyclone inventories for March-April and October-November are compared to atmospheric and upper ocean variables pertinent to mesocyclogenesis, as provided by reanalyses. This procedure allows the determination of the large-scale environments favorable for mesocyclone occurrence: low midtropospheric temperatures, greater sea ice extent, and large positive differences in the sea surface temperature minus low-altitude air temperature, the latter coinciding with enhanced low-level winds having a southerly component. We then evaluate the associations between polar mesocyclone formation and dominant patterns of low-frequency variability in the atmospheric circulation: the El Niño-Southern Oscillation (ENSO), the Southern Annular Mode (SAM), and the Trans-Polar Index (TPI). Our results suggest that in spring, the intrahemispheric variability in mesocyclogenesis is dominated by ENSO. In autumn, the influences of ENSO, SAM, and TPI on mesocyclone activity are about equal, although the response differs regionally. Moreover, teleconnections' effects on mesocyclone activity are somewhat reduced compared to that in spring. In both seasons, the phase of the semiannual oscillation modulates the associations with mesocyclones by influencing the latitude of the circumpolar trough and the amount of cyclonic activity over the Southern Ocean. These associations likely result from the displacement of the storm track between opposite phases of a given teleconnection and its position relative to the sea ice edge. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-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) Earth and Environmental Systems Institute PennState (EESI) Pennsylvania State University (Penn State) Penn State System-Penn State System Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Claud, Chantal Carleton, Andrew M. Duchiron, Bertrand Terray, Pascal |
author_facet |
Claud, Chantal Carleton, Andrew M. Duchiron, Bertrand Terray, Pascal |
author_sort |
Claud, Chantal |
title |
Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections |
title_short |
Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections |
title_full |
Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections |
title_fullStr |
Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections |
title_full_unstemmed |
Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections |
title_sort |
atmospheric and upper ocean environments of southern ocean polar mesocyclones in the transition season months and associations with teleconnections |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-00760025 https://hal.science/hal-00760025/document https://hal.science/hal-00760025/file/2009JD011995.pdf https://doi.org/10.1029/2009JD011995 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00760025 Journal of Geophysical Research, 2009, 114, pp.23104. ⟨10.1029/2009JD011995⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JD011995 hal-00760025 https://hal.science/hal-00760025 https://hal.science/hal-00760025/document https://hal.science/hal-00760025/file/2009JD011995.pdf BIBCODE: 2009JGRD.11423104C doi:10.1029/2009JD011995 IRD: PAR00004450 WOS: 000272443900002 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2009JD011995 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
D23 |
_version_ |
1801382084374167552 |
spelling |
ftmuseumnhn:oai:HAL:hal-00760025v1 2024-06-09T07:49:29+00:00 Atmospheric and upper ocean environments of Southern Ocean polar mesocyclones in the transition season months and associations with teleconnections Claud, Chantal Carleton, Andrew M. Duchiron, Bertrand Terray, Pascal Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-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) Earth and Environmental Systems Institute PennState (EESI) Pennsylvania State University (Penn State) Penn State System-Penn State System Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2009-12 https://hal.science/hal-00760025 https://hal.science/hal-00760025/document https://hal.science/hal-00760025/file/2009JD011995.pdf https://doi.org/10.1029/2009JD011995 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JD011995 hal-00760025 https://hal.science/hal-00760025 https://hal.science/hal-00760025/document https://hal.science/hal-00760025/file/2009JD011995.pdf BIBCODE: 2009JGRD.11423104C doi:10.1029/2009JD011995 IRD: PAR00004450 WOS: 000272443900002 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00760025 Journal of Geophysical Research, 2009, 114, pp.23104. ⟨10.1029/2009JD011995⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2009 ftmuseumnhn https://doi.org/10.1029/2009JD011995 2024-05-16T10:12:54Z International audience Over middle and higher latitudes of the Southern Hemisphere, intense mesoscale cyclonic vortices that develop in cold-air outbreaks (cold-air mesocyclones) occur frequently during transition season months. In this study, previously published mesocyclone inventories for March-April and October-November are compared to atmospheric and upper ocean variables pertinent to mesocyclogenesis, as provided by reanalyses. This procedure allows the determination of the large-scale environments favorable for mesocyclone occurrence: low midtropospheric temperatures, greater sea ice extent, and large positive differences in the sea surface temperature minus low-altitude air temperature, the latter coinciding with enhanced low-level winds having a southerly component. We then evaluate the associations between polar mesocyclone formation and dominant patterns of low-frequency variability in the atmospheric circulation: the El Niño-Southern Oscillation (ENSO), the Southern Annular Mode (SAM), and the Trans-Polar Index (TPI). Our results suggest that in spring, the intrahemispheric variability in mesocyclogenesis is dominated by ENSO. In autumn, the influences of ENSO, SAM, and TPI on mesocyclone activity are about equal, although the response differs regionally. Moreover, teleconnections' effects on mesocyclone activity are somewhat reduced compared to that in spring. In both seasons, the phase of the semiannual oscillation modulates the associations with mesocyclones by influencing the latitude of the circumpolar trough and the amount of cyclonic activity over the Southern Ocean. These associations likely result from the displacement of the storm track between opposite phases of a given teleconnection and its position relative to the sea ice edge. Article in Journal/Newspaper Sea ice Southern Ocean Muséum National d'Histoire Naturelle (MNHM): HAL Southern Ocean Journal of Geophysical Research 114 D23 |