Tropospheric forcing of the boreal polar vortex splitting in January 2003
The dynamical evolution of the relatively warm stratospheric winter season 2002–2003 in the Northern Hemisphere was studied and compared with the cold winter 2004–2005 based on NCEP-Reanalyses. Record low temperatures were observed in the lower and middle stratosphere over the Arctic region only at...
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ftdoajarticles:oai:doaj.org/article:abda41a1be5447c18d1135af0a25e8e4 2023-05-15T15:13:34+02:00 Tropospheric forcing of the boreal polar vortex splitting in January 2003 D. H. W. Peters P. Vargin A. Gabriel N. Tsvetkova V. Yushkov 2010-11-01T00:00:00Z https://doi.org/10.5194/angeo-28-2133-2010 https://doaj.org/article/abda41a1be5447c18d1135af0a25e8e4 EN eng Copernicus Publications https://www.ann-geophys.net/28/2133/2010/angeo-28-2133-2010.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-28-2133-2010 0992-7689 1432-0576 https://doaj.org/article/abda41a1be5447c18d1135af0a25e8e4 Annales Geophysicae, Vol 28, Pp 2133-2148 (2010) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2010 ftdoajarticles https://doi.org/10.5194/angeo-28-2133-2010 2022-12-31T16:02:00Z The dynamical evolution of the relatively warm stratospheric winter season 2002–2003 in the Northern Hemisphere was studied and compared with the cold winter 2004–2005 based on NCEP-Reanalyses. Record low temperatures were observed in the lower and middle stratosphere over the Arctic region only at the beginning of the 2002–2003 winter. Six sudden stratospheric warming events, including the major warming event with a splitting of the polar vortex in mid-January 2003, have been identified. This led to a very high vacillation of the zonal mean circulation and a weakening of the stratospheric polar vortex over the whole winter season. An estimate of the mean chemical ozone destruction inside the polar vortex showed a total ozone loss of about 45 DU in winter 2002–2003; that is about 2.5 times smaller than in winter 2004–2005. Embedded in a winter with high wave activity, we found two subtropical Rossby wave trains in the troposphere before the major sudden stratospheric warming event in January 2003. These Rossby waves propagated north-eastwards and maintained two upper tropospheric anticyclones. At the same time, the amplification of an upward propagating planetary wave 2 in the upper troposphere and lower stratosphere was observed, which could be caused primarily by those two wave trains. Furthermore, two extratropical Rossby wave trains over the North Pacific Ocean and North America were identified a couple of days later, which contribute mainly to the vertical planetary wave activity flux just before and during the major warming event. It is shown that these different tropospheric forcing processes caused the major warming event and contributed to the splitting of the polar vortex. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Pacific Annales Geophysicae 28 11 2133 2148 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 D. H. W. Peters P. Vargin A. Gabriel N. Tsvetkova V. Yushkov Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The dynamical evolution of the relatively warm stratospheric winter season 2002–2003 in the Northern Hemisphere was studied and compared with the cold winter 2004–2005 based on NCEP-Reanalyses. Record low temperatures were observed in the lower and middle stratosphere over the Arctic region only at the beginning of the 2002–2003 winter. Six sudden stratospheric warming events, including the major warming event with a splitting of the polar vortex in mid-January 2003, have been identified. This led to a very high vacillation of the zonal mean circulation and a weakening of the stratospheric polar vortex over the whole winter season. An estimate of the mean chemical ozone destruction inside the polar vortex showed a total ozone loss of about 45 DU in winter 2002–2003; that is about 2.5 times smaller than in winter 2004–2005. Embedded in a winter with high wave activity, we found two subtropical Rossby wave trains in the troposphere before the major sudden stratospheric warming event in January 2003. These Rossby waves propagated north-eastwards and maintained two upper tropospheric anticyclones. At the same time, the amplification of an upward propagating planetary wave 2 in the upper troposphere and lower stratosphere was observed, which could be caused primarily by those two wave trains. Furthermore, two extratropical Rossby wave trains over the North Pacific Ocean and North America were identified a couple of days later, which contribute mainly to the vertical planetary wave activity flux just before and during the major warming event. It is shown that these different tropospheric forcing processes caused the major warming event and contributed to the splitting of the polar vortex. |
format |
Article in Journal/Newspaper |
author |
D. H. W. Peters P. Vargin A. Gabriel N. Tsvetkova V. Yushkov |
author_facet |
D. H. W. Peters P. Vargin A. Gabriel N. Tsvetkova V. Yushkov |
author_sort |
D. H. W. Peters |
title |
Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
title_short |
Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
title_full |
Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
title_fullStr |
Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
title_full_unstemmed |
Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
title_sort |
tropospheric forcing of the boreal polar vortex splitting in january 2003 |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/angeo-28-2133-2010 https://doaj.org/article/abda41a1be5447c18d1135af0a25e8e4 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Annales Geophysicae, Vol 28, Pp 2133-2148 (2010) |
op_relation |
https://www.ann-geophys.net/28/2133/2010/angeo-28-2133-2010.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-28-2133-2010 0992-7689 1432-0576 https://doaj.org/article/abda41a1be5447c18d1135af0a25e8e4 |
op_doi |
https://doi.org/10.5194/angeo-28-2133-2010 |
container_title |
Annales Geophysicae |
container_volume |
28 |
container_issue |
11 |
container_start_page |
2133 |
op_container_end_page |
2148 |
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1766344107645468672 |