Tropospheric forcing of the boreal polar vortex splitting in January 2003
e 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 th...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
München : European Geopyhsical Union
2010
|
Subjects: | |
Online Access: | https://doi.org/10.34657/1706 https://oa.tib.eu/renate/handle/123456789/4034 |
id |
ftleibnizopen:oai:oai.leibnizopen.de:KR6CMYsBBwLIz6xGsiFn |
---|---|
record_format |
openpolar |
spelling |
ftleibnizopen:oai:oai.leibnizopen.de:KR6CMYsBBwLIz6xGsiFn 2023-11-12T04:13:44+01:00 Tropospheric forcing of the boreal polar vortex splitting in January 2003 Peters, D.H.W. Vargin, P. Gabriel, A. Tsvetkova, N. Yushkov, V. 2010 application/pdf https://doi.org/10.34657/1706 https://oa.tib.eu/renate/handle/123456789/4034 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Annales Geophysicae, Volume 28, Issue 11, Page 2133-2148 atmospheric forcing Northern Hemisphere ozone planetary wave polar vortex Rossby wave stratosphere troposphere warming wave propagation 530 article Text 2010 ftleibnizopen https://doi.org/10.34657/1706 2023-10-15T23:19:29Z e 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. publishedVersion Article in Journal/Newspaper Arctic Unknown Arctic Pacific |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
atmospheric forcing Northern Hemisphere ozone planetary wave polar vortex Rossby wave stratosphere troposphere warming wave propagation 530 |
spellingShingle |
atmospheric forcing Northern Hemisphere ozone planetary wave polar vortex Rossby wave stratosphere troposphere warming wave propagation 530 Peters, D.H.W. Vargin, P. Gabriel, A. Tsvetkova, N. Yushkov, V. Tropospheric forcing of the boreal polar vortex splitting in January 2003 |
topic_facet |
atmospheric forcing Northern Hemisphere ozone planetary wave polar vortex Rossby wave stratosphere troposphere warming wave propagation 530 |
description |
e 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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Peters, D.H.W. Vargin, P. Gabriel, A. Tsvetkova, N. Yushkov, V. |
author_facet |
Peters, D.H.W. Vargin, P. Gabriel, A. Tsvetkova, N. Yushkov, V. |
author_sort |
Peters, D.H.W. |
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 |
München : European Geopyhsical Union |
publishDate |
2010 |
url |
https://doi.org/10.34657/1706 https://oa.tib.eu/renate/handle/123456789/4034 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Annales Geophysicae, Volume 28, Issue 11, Page 2133-2148 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/1706 |
_version_ |
1782331595282186240 |