The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring
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 oz...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2006
|
Subjects: | |
Online Access: | https://doaj.org/article/cc01fef5f62e480bb5c0e75bb35c7129 |
id |
ftdoajarticles:oai:doaj.org/article:cc01fef5f62e480bb5c0e75bb35c7129 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:cc01fef5f62e480bb5c0e75bb35c7129 2023-05-15T15:08:09+02:00 The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring S. B. Andersen B. M. Knudsen 2006-01-01T00:00:00Z https://doaj.org/article/cc01fef5f62e480bb5c0e75bb35c7129 EN eng Copernicus Publications http://www.atmos-chem-phys.net/6/2837/2006/acp-6-2837-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/cc01fef5f62e480bb5c0e75bb35c7129 Atmospheric Chemistry and Physics, Vol 6, Iss 10, Pp 2837-2845 (2006) Physics QC1-999 Chemistry QD1-999 article 2006 ftdoajarticles 2022-12-31T14:27:09Z 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 Directory of Open Access Journals: DOAJ Articles Arctic |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 S. B. Andersen B. M. Knudsen The influence of polar vortex ozone depletion on NH mid-latitude ozone trends in spring |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
S. B. Andersen B. M. Knudsen |
author_facet |
S. B. Andersen B. M. Knudsen |
author_sort |
S. B. Andersen |
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 |
Copernicus Publications |
publishDate |
2006 |
url |
https://doaj.org/article/cc01fef5f62e480bb5c0e75bb35c7129 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 6, Iss 10, Pp 2837-2845 (2006) |
op_relation |
http://www.atmos-chem-phys.net/6/2837/2006/acp-6-2837-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/cc01fef5f62e480bb5c0e75bb35c7129 |
_version_ |
1766339569489281024 |