Simple measures of ozone depletion in the polar stratosphere
We investigate the extent to which commonly considered quantities, based on total column ozone observations and simulations, are applicable as measures of ozone loss in the polar vortices. Such quantities have been used frequently in ozone assessments by the World Meteorological Organization (WMO) a...
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fthzgzmk:oai:publications.hereon.de:26358 2023-06-11T04:06:41+02:00 Simple measures of ozone depletion in the polar stratosphere Müller, R. Grooss, J.-U. Lemmen, C. Heinze, D. Dameris, M. Bodeker, G. 2008 https://publications.hereon.de/id/26358 https://publications.hzg.de/id/26358 https://doi.org/10.5194/acp-8-251-2008 en eng EGU - Copernicus Publication http://dx.doi.org/10.5194/acp-8-251-2008 urn:issn:1680-7316 https://publications.hereon.de/id/26358 https://publications.hzg.de/id/26358 info:eu-repo/semantics/openAccess open_access oa_gold issn:1680-7316 Müller, R.; Grooss, J.-U.; Lemmen, C.; Heinze, D.; Dameris, M.; Bodeker, G.: Simple measures of ozone depletion in the polar stratosphere. In: Atmospheric Chemistry and Physics. Vol. 8 (2008) 2, 251 - 264. (DOI:10.5194/acp-8-251-2008) info:eu-repo/classification/ddc/551 info:eu-repo/semantics/article Zeitschrift Artikel 2008 fthzgzmk https://doi.org/10.5194/acp-8-251-2008 2023-05-28T23:22:48Z We investigate the extent to which commonly considered quantities, based on total column ozone observations and simulations, are applicable as measures of ozone loss in the polar vortices. Such quantities have been used frequently in ozone assessments by the World Meteorological Organization (WMO) and to assess the performance of chemistry-climate models. The most commonly considered quantity is monthly mean column ozone poleward of a latitude of 63° in spring. For the Arctic, these monthly means were found to be insensitive to the exact choice of the latitude threshold, unlike the Antarctic where greater sensitivity was found. Choosing a threshold based on the location of the transport barrier at the vortex boundary instead of geometric latitude led to a roughly similar year-to-year variability of the monthly means, but in particular years deviations of several tens of Dobson units occurred. Moreover, the minimum of daily total ozone minima poleward of a particular latitude, another popular measure, is debatable, insofar as it relies on one single measurement or model grid point. For Arctic conditions, this minimum value occurred often in air outside the polar vortex, both in the observations and in a chemistry-climate model. As a result, we recommend that the minimum of daily minima no longer be used when comparing polar ozone loss in observations and models. As a possible alternative, we suggest considering the minimum of daily average total ozone poleward of a particular equivalent latitude (or in the vortex) in spring. This definition both obviates relying on one single data point and reduces the impact of year-to-year variability in the Arctic vortex breakup on ozone loss measures. However, compact relations of such simple measures with meteorological quantities that describe the potential for polar heterogeneous chlorine activation and thus ozone loss were not found. Therefore, we argue that where possible, more so phisticated measures of chemical polar ozone loss that include additional information to ... Article in Journal/Newspaper Antarc* Antarctic Arctic Hereon Publications (Helmholtz-Zentrum) Antarctic Arctic The Antarctic Atmospheric Chemistry and Physics 8 2 251 264 |
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Hereon Publications (Helmholtz-Zentrum) |
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English |
topic |
info:eu-repo/classification/ddc/551 |
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info:eu-repo/classification/ddc/551 Müller, R. Grooss, J.-U. Lemmen, C. Heinze, D. Dameris, M. Bodeker, G. Simple measures of ozone depletion in the polar stratosphere |
topic_facet |
info:eu-repo/classification/ddc/551 |
description |
We investigate the extent to which commonly considered quantities, based on total column ozone observations and simulations, are applicable as measures of ozone loss in the polar vortices. Such quantities have been used frequently in ozone assessments by the World Meteorological Organization (WMO) and to assess the performance of chemistry-climate models. The most commonly considered quantity is monthly mean column ozone poleward of a latitude of 63° in spring. For the Arctic, these monthly means were found to be insensitive to the exact choice of the latitude threshold, unlike the Antarctic where greater sensitivity was found. Choosing a threshold based on the location of the transport barrier at the vortex boundary instead of geometric latitude led to a roughly similar year-to-year variability of the monthly means, but in particular years deviations of several tens of Dobson units occurred. Moreover, the minimum of daily total ozone minima poleward of a particular latitude, another popular measure, is debatable, insofar as it relies on one single measurement or model grid point. For Arctic conditions, this minimum value occurred often in air outside the polar vortex, both in the observations and in a chemistry-climate model. As a result, we recommend that the minimum of daily minima no longer be used when comparing polar ozone loss in observations and models. As a possible alternative, we suggest considering the minimum of daily average total ozone poleward of a particular equivalent latitude (or in the vortex) in spring. This definition both obviates relying on one single data point and reduces the impact of year-to-year variability in the Arctic vortex breakup on ozone loss measures. However, compact relations of such simple measures with meteorological quantities that describe the potential for polar heterogeneous chlorine activation and thus ozone loss were not found. Therefore, we argue that where possible, more so phisticated measures of chemical polar ozone loss that include additional information to ... |
format |
Article in Journal/Newspaper |
author |
Müller, R. Grooss, J.-U. Lemmen, C. Heinze, D. Dameris, M. Bodeker, G. |
author_facet |
Müller, R. Grooss, J.-U. Lemmen, C. Heinze, D. Dameris, M. Bodeker, G. |
author_sort |
Müller, R. |
title |
Simple measures of ozone depletion in the polar stratosphere |
title_short |
Simple measures of ozone depletion in the polar stratosphere |
title_full |
Simple measures of ozone depletion in the polar stratosphere |
title_fullStr |
Simple measures of ozone depletion in the polar stratosphere |
title_full_unstemmed |
Simple measures of ozone depletion in the polar stratosphere |
title_sort |
simple measures of ozone depletion in the polar stratosphere |
publisher |
EGU - Copernicus Publication |
publishDate |
2008 |
url |
https://publications.hereon.de/id/26358 https://publications.hzg.de/id/26358 https://doi.org/10.5194/acp-8-251-2008 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
issn:1680-7316 Müller, R.; Grooss, J.-U.; Lemmen, C.; Heinze, D.; Dameris, M.; Bodeker, G.: Simple measures of ozone depletion in the polar stratosphere. In: Atmospheric Chemistry and Physics. Vol. 8 (2008) 2, 251 - 264. (DOI:10.5194/acp-8-251-2008) |
op_relation |
http://dx.doi.org/10.5194/acp-8-251-2008 urn:issn:1680-7316 https://publications.hereon.de/id/26358 https://publications.hzg.de/id/26358 |
op_rights |
info:eu-repo/semantics/openAccess open_access oa_gold |
op_doi |
https://doi.org/10.5194/acp-8-251-2008 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
8 |
container_issue |
2 |
container_start_page |
251 |
op_container_end_page |
264 |
_version_ |
1768378733740163072 |