Aspects of stratospheric long-term changes induced by ozone depletion
International audience The effect of the stratospheric ozone depletion on the thermal and dynamical structure of the middle atmosphere is assessed using two 5-member ensembles of transient GCM simulations; one including linear trends in ozone, the other not, for the 1980 1999 period. Simulated tempe...
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ftecoleponts:oai:HAL:hal-04110129v1 2024-06-09T07:43:52+00:00 Aspects of stratospheric long-term changes induced by ozone depletion Cagnazzo, Chiara Claud, Chantal Hare, Sylvia 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) 2006 https://hal.science/hal-04110129 https://doi.org/10.1007/s00382-006-0120-1 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-006-0120-1 hal-04110129 https://hal.science/hal-04110129 BIBCODE: 2006ClDy.27.101C doi:10.1007/s00382-006-0120-1 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-04110129 Climate Dynamics, 2006, 27, pp.101-111. ⟨10.1007/s00382-006-0120-1⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2006 ftecoleponts https://doi.org/10.1007/s00382-006-0120-1 2024-05-16T12:32:04Z International audience The effect of the stratospheric ozone depletion on the thermal and dynamical structure of the middle atmosphere is assessed using two 5-member ensembles of transient GCM simulations; one including linear trends in ozone, the other not, for the 1980 1999 period. Simulated temperatures and observations are in good agreement in terms of mean values, autocorrelations and cross correlations. Annual-mean and seasonal temperature trends have been calculated using the same statistical analysis. Simulations show that ozone trends are responsible for reduced wave activity in the Arctic lower stratosphere in February and March, confirming both the role of dynamics in controlling March temperatures and a recently proposed mechanism whereby Arctic ozone depletion causes the reduction in wave activity entering the lower stratosphere. Changes in wave activity are consistent with an intensification of the polar vortex at the time of ozone depletion and with a weakened Brewer Dobson circulation: A decrease of the dynamical warming/cooling associated with the descending/ascending branch of the wintertime mean residual circulation at high/low latitudes has been obtained through the analysis of temperature observations (1980 1999). Ozone is responsible of about one third of the decrease of this dynamical cooling at high latitudes. An increase in the residual mean circulation is seen in the observations for the 1965 1980 period. Article in Journal/Newspaper Arctic École des Ponts ParisTech: HAL Arctic Climate Dynamics 27 1 101 111 |
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English |
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[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Cagnazzo, Chiara Claud, Chantal Hare, Sylvia Aspects of stratospheric long-term changes induced by ozone depletion |
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[SDU]Sciences of the Universe [physics] |
description |
International audience The effect of the stratospheric ozone depletion on the thermal and dynamical structure of the middle atmosphere is assessed using two 5-member ensembles of transient GCM simulations; one including linear trends in ozone, the other not, for the 1980 1999 period. Simulated temperatures and observations are in good agreement in terms of mean values, autocorrelations and cross correlations. Annual-mean and seasonal temperature trends have been calculated using the same statistical analysis. Simulations show that ozone trends are responsible for reduced wave activity in the Arctic lower stratosphere in February and March, confirming both the role of dynamics in controlling March temperatures and a recently proposed mechanism whereby Arctic ozone depletion causes the reduction in wave activity entering the lower stratosphere. Changes in wave activity are consistent with an intensification of the polar vortex at the time of ozone depletion and with a weakened Brewer Dobson circulation: A decrease of the dynamical warming/cooling associated with the descending/ascending branch of the wintertime mean residual circulation at high/low latitudes has been obtained through the analysis of temperature observations (1980 1999). Ozone is responsible of about one third of the decrease of this dynamical cooling at high latitudes. An increase in the residual mean circulation is seen in the observations for the 1965 1980 period. |
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) |
format |
Article in Journal/Newspaper |
author |
Cagnazzo, Chiara Claud, Chantal Hare, Sylvia |
author_facet |
Cagnazzo, Chiara Claud, Chantal Hare, Sylvia |
author_sort |
Cagnazzo, Chiara |
title |
Aspects of stratospheric long-term changes induced by ozone depletion |
title_short |
Aspects of stratospheric long-term changes induced by ozone depletion |
title_full |
Aspects of stratospheric long-term changes induced by ozone depletion |
title_fullStr |
Aspects of stratospheric long-term changes induced by ozone depletion |
title_full_unstemmed |
Aspects of stratospheric long-term changes induced by ozone depletion |
title_sort |
aspects of stratospheric long-term changes induced by ozone depletion |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-04110129 https://doi.org/10.1007/s00382-006-0120-1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-04110129 Climate Dynamics, 2006, 27, pp.101-111. ⟨10.1007/s00382-006-0120-1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-006-0120-1 hal-04110129 https://hal.science/hal-04110129 BIBCODE: 2006ClDy.27.101C doi:10.1007/s00382-006-0120-1 |
op_doi |
https://doi.org/10.1007/s00382-006-0120-1 |
container_title |
Climate Dynamics |
container_volume |
27 |
container_issue |
1 |
container_start_page |
101 |
op_container_end_page |
111 |
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1801372706040446976 |