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-00301060v1 2023-11-12T04:13:17+01:00 The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring Andersen, S. B. Knudsen, B. M. Danish Meteorological Institute (DMI) 2006-03-10 https://hal.science/hal-00301060 https://hal.science/hal-00301060/document https://hal.science/hal-00301060/file/acpd-6-1793-2006.pdf en eng HAL CCSD European Geosciences Union hal-00301060 https://hal.science/hal-00301060 https://hal.science/hal-00301060/document https://hal.science/hal-00301060/file/acpd-6-1793-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301060 Atmospheric Chemistry and Physics Discussions, 2006, 6 (2), pp.1793-1811 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:13:47Z 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. The dilution also has a significant impact on the zonal mean ozone trends. With a multiple linear regression model we find that the dilution may explain 39% of the trend in the period 1979?1997 and 54% of the trend in the period 1979?2002. By calculting the effect of simply removing the dilutions we get the possibly more reliable estimates that that dilution may explain 29% of the trend in the period 1979?1997 and 33% of the trend in the period 1979?2002. 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. The dilution also has a significant impact on the zonal mean ozone trends. With a multiple linear regression model we find that the dilution may explain 39% of the trend in the period 1979?1997 and 54% of the trend in the period 1979?2002. By calculting the effect of simply removing the dilutions we get the possibly more reliable estimates that that dilution may explain 29% of the trend in the period 1979?1997 and 33% of the trend in the period 1979?2002. |
author2 |
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-00301060 https://hal.science/hal-00301060/document https://hal.science/hal-00301060/file/acpd-6-1793-2006.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301060 Atmospheric Chemistry and Physics Discussions, 2006, 6 (2), pp.1793-1811 |
op_relation |
hal-00301060 https://hal.science/hal-00301060 https://hal.science/hal-00301060/document https://hal.science/hal-00301060/file/acpd-6-1793-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331358008311808 |