The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring
International audience Reverse domain-filling trajectory calculations have been performed for the years 1993, 1995, 1996, 1997, and 2000 to calculate the spreading of ozone depleted air from the polar vortex to midlatitudes in spring. We find that for these years with massive Arctic ozone depletion...
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ftccsdartic:oai:HAL:hal-00295977v1 2023-11-12T04:13:24+01:00 The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring Andersen, S. B. Knudsen, B. M. Department of Research and Development Danish Meteorological Institute (DMI) 2006-07-11 https://hal.science/hal-00295977 https://hal.science/hal-00295977/document https://hal.science/hal-00295977/file/acp-6-2837-2006.pdf en eng HAL CCSD European Geosciences Union hal-00295977 https://hal.science/hal-00295977 https://hal.science/hal-00295977/document https://hal.science/hal-00295977/file/acp-6-2837-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295977 Atmospheric Chemistry and Physics, 2006, 6 (10), pp.2837-2845 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:17:19Z International audience Reverse domain-filling trajectory calculations have been performed for the years 1993, 1995, 1996, 1997, and 2000 to calculate the spreading of ozone depleted air from the polar vortex to midlatitudes in spring. We find that for these years with massive Arctic ozone depletion the zonal mean total ozone column at midlatitudes is reduced with between 7 and 12 DU in the April-May period. The polar vortex and remnants have preferred locations which leads to longitudinal differences in the midlatitude ozone trends. Together with decadal variations in circulation the dilution of ozone depleted air may explain the major fraction of longitudinal differences in midlatitude ozone trends. For the period 1979?1997 the dilution may explain 50% of the longitudinal differences in ozone trends and for the period 1979?2002 it may explain 45%. The dilution also has a significant impact on the zonal mean ozone trends in the April-May period. Although uncertainties are large due to uncertainties in the ozone depletion values and neglect of ozone depletion in other years than 1993, 1995, 1996, 1997, and 2000 we have tried to calculate the size of this effect. We estimate that dilution may explain 29% of the trend in the period 1979?1997 and 33% of the trend in the period 1979?2002 as a lower limit. Article in Journal/Newspaper 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 |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Andersen, S. B. Knudsen, B. M. The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Reverse domain-filling trajectory calculations have been performed for the years 1993, 1995, 1996, 1997, and 2000 to calculate the spreading of ozone depleted air from the polar vortex to midlatitudes in spring. We find that for these years with massive Arctic ozone depletion the zonal mean total ozone column at midlatitudes is reduced with between 7 and 12 DU in the April-May period. The polar vortex and remnants have preferred locations which leads to longitudinal differences in the midlatitude ozone trends. Together with decadal variations in circulation the dilution of ozone depleted air may explain the major fraction of longitudinal differences in midlatitude ozone trends. For the period 1979?1997 the dilution may explain 50% of the longitudinal differences in ozone trends and for the period 1979?2002 it may explain 45%. The dilution also has a significant impact on the zonal mean ozone trends in the April-May period. Although uncertainties are large due to uncertainties in the ozone depletion values and neglect of ozone depletion in other years than 1993, 1995, 1996, 1997, and 2000 we have tried to calculate the size of this effect. We estimate that dilution may explain 29% of the trend in the period 1979?1997 and 33% of the trend in the period 1979?2002 as a lower limit. |
author2 |
Department of Research and Development Danish Meteorological Institute (DMI) |
format |
Article in Journal/Newspaper |
author |
Andersen, S. B. Knudsen, B. M. |
author_facet |
Andersen, S. B. Knudsen, B. M. |
author_sort |
Andersen, S. B. |
title |
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
title_short |
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
title_full |
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
title_fullStr |
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
title_full_unstemmed |
The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
title_sort |
influence of polar vortex ozone depletion on nh mid-latitude ozone trends in spring |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00295977 https://hal.science/hal-00295977/document https://hal.science/hal-00295977/file/acp-6-2837-2006.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295977 Atmospheric Chemistry and Physics, 2006, 6 (10), pp.2837-2845 |
op_relation |
hal-00295977 https://hal.science/hal-00295977 https://hal.science/hal-00295977/document https://hal.science/hal-00295977/file/acp-6-2837-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331418784825344 |