Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn
Dynamical processes during the formation phase of the Arctic stratospheric vortex in autumn (from September to December) can introduce considerable interannual variability in the amount of ozone that is incorporated into the vortex. Chemistry in autumn tends to remove part of this variability becaus...
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ftdoajarticles:oai:doaj.org/article:dc5525b559bd480bb35ce40956970ff5 2023-05-15T14:55:51+02:00 Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn D. Blessmann I. Wohltmann R. Lehmann M. Rex 2012-06-01T00:00:00Z https://doi.org/10.5194/acp-12-4817-2012 https://doaj.org/article/dc5525b559bd480bb35ce40956970ff5 EN eng Copernicus Publications http://www.atmos-chem-phys.net/12/4817/2012/acp-12-4817-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-4817-2012 1680-7316 1680-7324 https://doaj.org/article/dc5525b559bd480bb35ce40956970ff5 Atmospheric Chemistry and Physics, Vol 12, Iss 11, Pp 4817-4823 (2012) Physics QC1-999 Chemistry QD1-999 article 2012 ftdoajarticles https://doi.org/10.5194/acp-12-4817-2012 2022-12-30T21:30:49Z Dynamical processes during the formation phase of the Arctic stratospheric vortex in autumn (from September to December) can introduce considerable interannual variability in the amount of ozone that is incorporated into the vortex. Chemistry in autumn tends to remove part of this variability because ozone relaxes towards equilibrium. As a quantitative measure of how important dynamical variability during vortex formation is for the winter ozone abundances above the Arctic we analyze which fraction of an ozone anomaly induced during vortex formation persists until early winter (3 January). The work is based on the Lagrangian Chemistry Transport Model ATLAS. In a case study, model runs for the winter 1999–2000 are used to assess the fate of an ozone anomaly artificially introduced during the vortex formation phase on 16 September. In addition, runs with reduced resolution explore the sensitivity of the results to interannual changes in transport, mixing, temperatures and NO x . The runs provide information about the persistence of the induced ozone anomaly as a function of time, potential temperature and latitude. The induced ozone anomaly survives longer inside the polar vortex than outside the vortex. Half of the initial perturbation survives until 3 January at 550 K inside the polar vortex, with a rapid fall off towards higher levels, mainly due to NO x induced chemistry. Above 750 K the signal falls to values below 0.5%. Hence, dynamically induced ozone variability from the early vortex formation phase cannot significantly contribute to early winter variability above 750 K. At lower levels increasingly larger fractions of the initial perturbation survive, reaching 90% at 450 K. In this vertical range dynamical processes during the vortex formation phase are crucial for the ozone abundance in early winter. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Chemistry and Physics 12 11 4817 4823 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 D. Blessmann I. Wohltmann R. Lehmann M. Rex Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn |
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Physics QC1-999 Chemistry QD1-999 |
description |
Dynamical processes during the formation phase of the Arctic stratospheric vortex in autumn (from September to December) can introduce considerable interannual variability in the amount of ozone that is incorporated into the vortex. Chemistry in autumn tends to remove part of this variability because ozone relaxes towards equilibrium. As a quantitative measure of how important dynamical variability during vortex formation is for the winter ozone abundances above the Arctic we analyze which fraction of an ozone anomaly induced during vortex formation persists until early winter (3 January). The work is based on the Lagrangian Chemistry Transport Model ATLAS. In a case study, model runs for the winter 1999–2000 are used to assess the fate of an ozone anomaly artificially introduced during the vortex formation phase on 16 September. In addition, runs with reduced resolution explore the sensitivity of the results to interannual changes in transport, mixing, temperatures and NO x . The runs provide information about the persistence of the induced ozone anomaly as a function of time, potential temperature and latitude. The induced ozone anomaly survives longer inside the polar vortex than outside the vortex. Half of the initial perturbation survives until 3 January at 550 K inside the polar vortex, with a rapid fall off towards higher levels, mainly due to NO x induced chemistry. Above 750 K the signal falls to values below 0.5%. Hence, dynamically induced ozone variability from the early vortex formation phase cannot significantly contribute to early winter variability above 750 K. At lower levels increasingly larger fractions of the initial perturbation survive, reaching 90% at 450 K. In this vertical range dynamical processes during the vortex formation phase are crucial for the ozone abundance in early winter. |
format |
Article in Journal/Newspaper |
author |
D. Blessmann I. Wohltmann R. Lehmann M. Rex |
author_facet |
D. Blessmann I. Wohltmann R. Lehmann M. Rex |
author_sort |
D. Blessmann |
title |
Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn |
title_short |
Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn |
title_full |
Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn |
title_fullStr |
Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn |
title_full_unstemmed |
Persistence of ozone anomalies in the Arctic stratospheric vortex in autumn |
title_sort |
persistence of ozone anomalies in the arctic stratospheric vortex in autumn |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-4817-2012 https://doaj.org/article/dc5525b559bd480bb35ce40956970ff5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 12, Iss 11, Pp 4817-4823 (2012) |
op_relation |
http://www.atmos-chem-phys.net/12/4817/2012/acp-12-4817-2012.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-12-4817-2012 1680-7316 1680-7324 https://doaj.org/article/dc5525b559bd480bb35ce40956970ff5 |
op_doi |
https://doi.org/10.5194/acp-12-4817-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
11 |
container_start_page |
4817 |
op_container_end_page |
4823 |
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