The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring
Calculations of equivalent length from an artificial advected tracer provide new insight into the isentropic transport processes occurring within the Antarctic stratospheric vortex. These calculations show two distinct regions of approximately equal area: a strongly mixed vortex core and a broad rin...
Published in: | Journal of Geophysical Research: Atmospheres |
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American Geophysical Union
2001
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ftnerc:oai:nora.nerc.ac.uk:19843 2023-05-15T13:45:12+02:00 The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring Lee, Adrian M. Roscoe, Howard K. Jones, Anna E. Haynes, Peter H. Shuckburgh, Emily F. Morrey, Martin W. Pumphrey, Hugh C. 2001-02 http://nora.nerc.ac.uk/id/eprint/19843/ https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2000JD900398 unknown American Geophysical Union Lee, Adrian M.; Roscoe, Howard K.; Jones, Anna E. orcid:0000-0002-2040-4841 Haynes, Peter H.; Shuckburgh, Emily F.; Morrey, Martin W.; Pumphrey, Hugh C. 2001 The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring. Journal of Geophysical Research, 106 (D3). 3203-3211. https://doi.org/10.1029/2000JD900398 <https://doi.org/10.1029/2000JD900398> Publication - Article PeerReviewed 2001 ftnerc https://doi.org/10.1029/2000JD900398 2023-02-04T19:32:35Z Calculations of equivalent length from an artificial advected tracer provide new insight into the isentropic transport processes occurring within the Antarctic stratospheric vortex. These calculations show two distinct regions of approximately equal area: a strongly mixed vortex core and a broad ring of weakly mixed air extending out to the vortex boundary. This broad ring of vortex air remains isolated from the core between late winter and midspring. Satellite measurements of stratospheric H2O confirm that the isolation lasts until at least mid-October. A three-dimensional chemical transport model simulation of the Antarctic ozone hole quantifies the ozone loss within this ring and demonstrates its isolation. In contrast to the vortex core, ozone loss in the weakly mixed broad ring is not complete. The reasons are twofold. First, warmer temperatures in the broad ring prevent continuous polar stratospheric cloud (PSC) formation and the associated chemical processing (i.e., the conversion of unreactive chlorine into reactive forms). Second, the isolation prevents ozone-rich air from the broad ring mixing with chemically processed air from the vortex core. If the stratosphere continues to cool, this will lead to increased PSC formation and more complete chemical processing in the broad ring. Despite the expected decline in halocarbons, sensitivity studies suggest that this mechanism will lead to enhanced ozone loss in the weakly mixed region, delaying the future recovery of the ozone hole. Article in Journal/Newspaper Antarc* Antarctic Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Journal of Geophysical Research: Atmospheres 106 D3 3203 3211 |
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Natural Environment Research Council: NERC Open Research Archive |
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description |
Calculations of equivalent length from an artificial advected tracer provide new insight into the isentropic transport processes occurring within the Antarctic stratospheric vortex. These calculations show two distinct regions of approximately equal area: a strongly mixed vortex core and a broad ring of weakly mixed air extending out to the vortex boundary. This broad ring of vortex air remains isolated from the core between late winter and midspring. Satellite measurements of stratospheric H2O confirm that the isolation lasts until at least mid-October. A three-dimensional chemical transport model simulation of the Antarctic ozone hole quantifies the ozone loss within this ring and demonstrates its isolation. In contrast to the vortex core, ozone loss in the weakly mixed broad ring is not complete. The reasons are twofold. First, warmer temperatures in the broad ring prevent continuous polar stratospheric cloud (PSC) formation and the associated chemical processing (i.e., the conversion of unreactive chlorine into reactive forms). Second, the isolation prevents ozone-rich air from the broad ring mixing with chemically processed air from the vortex core. If the stratosphere continues to cool, this will lead to increased PSC formation and more complete chemical processing in the broad ring. Despite the expected decline in halocarbons, sensitivity studies suggest that this mechanism will lead to enhanced ozone loss in the weakly mixed region, delaying the future recovery of the ozone hole. |
format |
Article in Journal/Newspaper |
author |
Lee, Adrian M. Roscoe, Howard K. Jones, Anna E. Haynes, Peter H. Shuckburgh, Emily F. Morrey, Martin W. Pumphrey, Hugh C. |
spellingShingle |
Lee, Adrian M. Roscoe, Howard K. Jones, Anna E. Haynes, Peter H. Shuckburgh, Emily F. Morrey, Martin W. Pumphrey, Hugh C. The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring |
author_facet |
Lee, Adrian M. Roscoe, Howard K. Jones, Anna E. Haynes, Peter H. Shuckburgh, Emily F. Morrey, Martin W. Pumphrey, Hugh C. |
author_sort |
Lee, Adrian M. |
title |
The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring |
title_short |
The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring |
title_full |
The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring |
title_fullStr |
The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring |
title_full_unstemmed |
The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring |
title_sort |
impact of the mixing properties within the antarctic stratospheric vortex on ozone loss in spring |
publisher |
American Geophysical Union |
publishDate |
2001 |
url |
http://nora.nerc.ac.uk/id/eprint/19843/ https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2000JD900398 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Lee, Adrian M.; Roscoe, Howard K.; Jones, Anna E. orcid:0000-0002-2040-4841 Haynes, Peter H.; Shuckburgh, Emily F.; Morrey, Martin W.; Pumphrey, Hugh C. 2001 The impact of the mixing properties within the Antarctic stratospheric vortex on ozone loss in spring. Journal of Geophysical Research, 106 (D3). 3203-3211. https://doi.org/10.1029/2000JD900398 <https://doi.org/10.1029/2000JD900398> |
op_doi |
https://doi.org/10.1029/2000JD900398 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
106 |
container_issue |
D3 |
container_start_page |
3203 |
op_container_end_page |
3211 |
_version_ |
1766216903670366208 |