On the stratospheric dynamics in spring and summer : a tropics/poles coupling study
The stratosphere dynamics remains largely unexplored in summer and spring. In the context of the ozone layer recovery and the increasing of greenhouse gases emissions, efforts must be provided to improve our knowledge of the dynamical processes driving the stratosphere. Such improvements would lead...
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ftccsdartic:oai:HAL:tel-00801758v1 2023-05-15T15:17:57+02:00 On the stratospheric dynamics in spring and summer : a tropics/poles coupling study Dynamique de la stratosphère au printemps et en été : étude des couplages tropiques/pôles Thiéblemont, Rémi Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) Université d'Orléans Nathalie Brun-Huret 2012-10-19 https://tel.archives-ouvertes.fr/tel-00801758 https://tel.archives-ouvertes.fr/tel-00801758/document https://tel.archives-ouvertes.fr/tel-00801758/file/remi.thieblemont_2755.pdf fr fre HAL CCSD NNT: 2012ORLE2036 tel-00801758 https://tel.archives-ouvertes.fr/tel-00801758 https://tel.archives-ouvertes.fr/tel-00801758/document https://tel.archives-ouvertes.fr/tel-00801758/file/remi.thieblemont_2755.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-00801758 Sciences de la Terre. Université d'Orléans, 2012. Français. ⟨NNT : 2012ORLE2036⟩ Spring Anticyclone Wave activity Advection model Intrusions Printemps Anticylone Stratosphère Intrusions de masses d'air Modèle de transport Activité ondulatoire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2012 ftccsdartic 2021-11-21T03:50:59Z The stratosphere dynamics remains largely unexplored in summer and spring. In the context of the ozone layer recovery and the increasing of greenhouse gases emissions, efforts must be provided to improve our knowledge of the dynamical processes driving the stratosphere. Such improvements would lead to better future climate trends estimates. Recently, spring and summer satellites observations revealed occurrences of irreversible air masses transport from the tropics to the Arctic region. However, the associated mechanisms are poorly understood. The present work consists of dynamical and climatological analyses of these events in order to identify their causes and their occurrence frequency. In particular, we focused on the sporadic events, where the intrusion signal persists several months in the polar region, trapped within an anticyclonic anomaly before disappearing in summer. We used MLS/Aura and MIPAS/ENVISAT satellites data, the SPIRALE balloon borne data and the results of the advection model MIMOSA to identify, characterize and quantify these events. Stratospheric dynamical conditions are investigated using the reanalyses data of the ECMWF. Finally, a systematic algorithm to detect low-latitude intrusions has been developed and applied on MIMOSA results to perform a climatology between 1980 and 2011 The results suggest that the frequency of these events, driven by the planetary wave activity, is increasing since the 21st century. Furthermore, their occurrence in spring appears to depend on the stratospheric dynamical evolution during winter and on the tropical region dynamical regime. La dynamique de la stratosphère au printemps et en été reste à ce jour largement inexplorée. Or dans les contextes actuels du recouvrement de la couche d’ozone et de l’augmentation des émissions de gaz à effet de serre, une amélioration de la compréhension des processus dynamiques contrôlant la stratosphère s’avère nécessaire, afin de mieux appréhender l’évolution du climat dans le futur. Des observations satellitaires ... Doctoral or Postdoctoral Thesis Arctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Spring Anticyclone Wave activity Advection model Intrusions Printemps Anticylone Stratosphère Intrusions de masses d'air Modèle de transport Activité ondulatoire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Spring Anticyclone Wave activity Advection model Intrusions Printemps Anticylone Stratosphère Intrusions de masses d'air Modèle de transport Activité ondulatoire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Thiéblemont, Rémi On the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
topic_facet |
Spring Anticyclone Wave activity Advection model Intrusions Printemps Anticylone Stratosphère Intrusions de masses d'air Modèle de transport Activité ondulatoire [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
The stratosphere dynamics remains largely unexplored in summer and spring. In the context of the ozone layer recovery and the increasing of greenhouse gases emissions, efforts must be provided to improve our knowledge of the dynamical processes driving the stratosphere. Such improvements would lead to better future climate trends estimates. Recently, spring and summer satellites observations revealed occurrences of irreversible air masses transport from the tropics to the Arctic region. However, the associated mechanisms are poorly understood. The present work consists of dynamical and climatological analyses of these events in order to identify their causes and their occurrence frequency. In particular, we focused on the sporadic events, where the intrusion signal persists several months in the polar region, trapped within an anticyclonic anomaly before disappearing in summer. We used MLS/Aura and MIPAS/ENVISAT satellites data, the SPIRALE balloon borne data and the results of the advection model MIMOSA to identify, characterize and quantify these events. Stratospheric dynamical conditions are investigated using the reanalyses data of the ECMWF. Finally, a systematic algorithm to detect low-latitude intrusions has been developed and applied on MIMOSA results to perform a climatology between 1980 and 2011 The results suggest that the frequency of these events, driven by the planetary wave activity, is increasing since the 21st century. Furthermore, their occurrence in spring appears to depend on the stratospheric dynamical evolution during winter and on the tropical region dynamical regime. La dynamique de la stratosphère au printemps et en été reste à ce jour largement inexplorée. Or dans les contextes actuels du recouvrement de la couche d’ozone et de l’augmentation des émissions de gaz à effet de serre, une amélioration de la compréhension des processus dynamiques contrôlant la stratosphère s’avère nécessaire, afin de mieux appréhender l’évolution du climat dans le futur. Des observations satellitaires ... |
author2 |
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) Université d'Orléans Nathalie Brun-Huret |
format |
Doctoral or Postdoctoral Thesis |
author |
Thiéblemont, Rémi |
author_facet |
Thiéblemont, Rémi |
author_sort |
Thiéblemont, Rémi |
title |
On the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
title_short |
On the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
title_full |
On the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
title_fullStr |
On the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
title_full_unstemmed |
On the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
title_sort |
on the stratospheric dynamics in spring and summer : a tropics/poles coupling study |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://tel.archives-ouvertes.fr/tel-00801758 https://tel.archives-ouvertes.fr/tel-00801758/document https://tel.archives-ouvertes.fr/tel-00801758/file/remi.thieblemont_2755.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
https://tel.archives-ouvertes.fr/tel-00801758 Sciences de la Terre. Université d'Orléans, 2012. Français. ⟨NNT : 2012ORLE2036⟩ |
op_relation |
NNT: 2012ORLE2036 tel-00801758 https://tel.archives-ouvertes.fr/tel-00801758 https://tel.archives-ouvertes.fr/tel-00801758/document https://tel.archives-ouvertes.fr/tel-00801758/file/remi.thieblemont_2755.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766348204310265856 |