Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex
International audience In-situ measurements of ozone and water vapour, in the Antarctic lower stratosphere, were made as part of the APE-GAIA mission in September and October 1999. The measurements show a distinct difference above and below the 415K isentrope. Above 415K, the chemically perturbed re...
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ftccsdartic:oai:HAL:hal-00317755v1 2023-05-15T13:41:57+02:00 Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex Peet, E. Rudakov, V. Yushkov, V. Redaelli, G. Mackenzie, A. R. Department of Environmental Science Lancaster Lancaster University Central Aerological Observatory (CAO) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) Department of Physics Okayama University 2004-12-22 https://hal.archives-ouvertes.fr/hal-00317755 https://hal.archives-ouvertes.fr/hal-00317755/document https://hal.archives-ouvertes.fr/hal-00317755/file/angeo-22-4035-2004.pdf en eng HAL CCSD European Geosciences Union hal-00317755 https://hal.archives-ouvertes.fr/hal-00317755 https://hal.archives-ouvertes.fr/hal-00317755/document https://hal.archives-ouvertes.fr/hal-00317755/file/angeo-22-4035-2004.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.archives-ouvertes.fr/hal-00317755 Annales Geophysicae, European Geosciences Union, 2004, 22 (12), pp.4035-4041 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2004 ftccsdartic 2021-05-30T00:31:19Z International audience In-situ measurements of ozone and water vapour, in the Antarctic lower stratosphere, were made as part of the APE-GAIA mission in September and October 1999. The measurements show a distinct difference above and below the 415K isentrope. Above 415K, the chemically perturbed region of low ozone and water vapour is clearly evident. Below 415K, but still above the tropopause, no sharp meridional gradients in ozone and water vapour were observed. The observations are consistent with analyses of potential vorticity from the European Centre for Medium Range Weather Forecasting, which show smaller radial gradients at 380K than at 450K potential temperature. Ozone loss in the chemically perturbed region above 415K averages 5ppbv per day for mid-September to mid-October. Apparent ozone loss rates in the sub-vortex region are greater, at 7ppbv per day. The data support, therefore, the existence of a sub-vortex region in which meridional transport is more efficient than in the vortex above. The low ozone mixing ratios in the sub-vortex region may be due to in-situ chemical destruction of ozone or transport of ozone-poor air out of the bottom of the vortex. The aircraft data we use cannot distinguish between these two processes. Key words. Meteorology and atmospheric dynamics polar meteorology) ? Atmospheric composition and structure (middle atmosphere?composition and chemistry) Article in Journal/Newspaper Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Austral |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Peet, E. Rudakov, V. Yushkov, V. Redaelli, G. Mackenzie, A. R. Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience In-situ measurements of ozone and water vapour, in the Antarctic lower stratosphere, were made as part of the APE-GAIA mission in September and October 1999. The measurements show a distinct difference above and below the 415K isentrope. Above 415K, the chemically perturbed region of low ozone and water vapour is clearly evident. Below 415K, but still above the tropopause, no sharp meridional gradients in ozone and water vapour were observed. The observations are consistent with analyses of potential vorticity from the European Centre for Medium Range Weather Forecasting, which show smaller radial gradients at 380K than at 450K potential temperature. Ozone loss in the chemically perturbed region above 415K averages 5ppbv per day for mid-September to mid-October. Apparent ozone loss rates in the sub-vortex region are greater, at 7ppbv per day. The data support, therefore, the existence of a sub-vortex region in which meridional transport is more efficient than in the vortex above. The low ozone mixing ratios in the sub-vortex region may be due to in-situ chemical destruction of ozone or transport of ozone-poor air out of the bottom of the vortex. The aircraft data we use cannot distinguish between these two processes. Key words. Meteorology and atmospheric dynamics polar meteorology) ? Atmospheric composition and structure (middle atmosphere?composition and chemistry) |
author2 |
Department of Environmental Science Lancaster Lancaster University Central Aerological Observatory (CAO) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) Department of Physics Okayama University |
format |
Article in Journal/Newspaper |
author |
Peet, E. Rudakov, V. Yushkov, V. Redaelli, G. Mackenzie, A. R. |
author_facet |
Peet, E. Rudakov, V. Yushkov, V. Redaelli, G. Mackenzie, A. R. |
author_sort |
Peet, E. |
title |
Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
title_short |
Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
title_full |
Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
title_fullStr |
Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
title_full_unstemmed |
Ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
title_sort |
ozone and water vapour in the austral polar stratospheric vortex and sub-vortex |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.archives-ouvertes.fr/hal-00317755 https://hal.archives-ouvertes.fr/hal-00317755/document https://hal.archives-ouvertes.fr/hal-00317755/file/angeo-22-4035-2004.pdf |
geographic |
Antarctic The Antarctic Austral |
geographic_facet |
Antarctic The Antarctic Austral |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.archives-ouvertes.fr/hal-00317755 Annales Geophysicae, European Geosciences Union, 2004, 22 (12), pp.4035-4041 |
op_relation |
hal-00317755 https://hal.archives-ouvertes.fr/hal-00317755 https://hal.archives-ouvertes.fr/hal-00317755/document https://hal.archives-ouvertes.fr/hal-00317755/file/angeo-22-4035-2004.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766160798949834752 |