The Arctic vortex in March 2011: a dynamical perspective
Despite the record ozone loss observed in March 2011, dynamical conditions in the Arctic stratosphere were unusual but not unprecedented. Weak planetary wave driving in February preceded cold anomalies in the polar lower stratosphere in March and a relatively late breakup of the Arctic vortex in Apr...
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ftcopernicus:oai:publications.copernicus.org:acp12084 2023-05-15T14:36:52+02:00 The Arctic vortex in March 2011: a dynamical perspective Hurwitz, M. M. Newman, P. A. Garfinkel, C. I. 2018-01-15 application/pdf https://doi.org/10.5194/acp-11-11447-2011 https://www.atmos-chem-phys.net/11/11447/2011/ eng eng doi:10.5194/acp-11-11447-2011 https://www.atmos-chem-phys.net/11/11447/2011/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-11-11447-2011 2019-12-24T09:56:34Z Despite the record ozone loss observed in March 2011, dynamical conditions in the Arctic stratosphere were unusual but not unprecedented. Weak planetary wave driving in February preceded cold anomalies in the polar lower stratosphere in March and a relatively late breakup of the Arctic vortex in April. La Niña conditions and the westerly phase of the quasi-biennial oscillation (QBO) were observed in March 2011. Though these conditions are generally associated with a stronger vortex in mid-winter, the respective cold anomalies do not persist through March. Therefore, the La Niña and QBO-westerly conditions cannot explain the observed cold anomalies in March 2011. In contrast, positive sea surface temperature anomalies in the North Pacific may have contributed to the unusually weak tropospheric wave driving and strong Arctic vortex in late winter 2011. Text Arctic Copernicus Publications: E-Journals Arctic Pacific Atmospheric Chemistry and Physics 11 22 11447 11453 |
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Copernicus Publications: E-Journals |
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English |
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Despite the record ozone loss observed in March 2011, dynamical conditions in the Arctic stratosphere were unusual but not unprecedented. Weak planetary wave driving in February preceded cold anomalies in the polar lower stratosphere in March and a relatively late breakup of the Arctic vortex in April. La Niña conditions and the westerly phase of the quasi-biennial oscillation (QBO) were observed in March 2011. Though these conditions are generally associated with a stronger vortex in mid-winter, the respective cold anomalies do not persist through March. Therefore, the La Niña and QBO-westerly conditions cannot explain the observed cold anomalies in March 2011. In contrast, positive sea surface temperature anomalies in the North Pacific may have contributed to the unusually weak tropospheric wave driving and strong Arctic vortex in late winter 2011. |
format |
Text |
author |
Hurwitz, M. M. Newman, P. A. Garfinkel, C. I. |
spellingShingle |
Hurwitz, M. M. Newman, P. A. Garfinkel, C. I. The Arctic vortex in March 2011: a dynamical perspective |
author_facet |
Hurwitz, M. M. Newman, P. A. Garfinkel, C. I. |
author_sort |
Hurwitz, M. M. |
title |
The Arctic vortex in March 2011: a dynamical perspective |
title_short |
The Arctic vortex in March 2011: a dynamical perspective |
title_full |
The Arctic vortex in March 2011: a dynamical perspective |
title_fullStr |
The Arctic vortex in March 2011: a dynamical perspective |
title_full_unstemmed |
The Arctic vortex in March 2011: a dynamical perspective |
title_sort |
arctic vortex in march 2011: a dynamical perspective |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-11-11447-2011 https://www.atmos-chem-phys.net/11/11447/2011/ |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
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Arctic |
genre_facet |
Arctic |
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eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-11-11447-2011 https://www.atmos-chem-phys.net/11/11447/2011/ |
op_doi |
https://doi.org/10.5194/acp-11-11447-2011 |
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Atmospheric Chemistry and Physics |
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11 |
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22 |
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11447 |
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11453 |
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1766309412999266304 |