Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings
The dynamical response of the polar mesosphere and lower thermosphere (MLT) to sudden stratospheric warmings is investigated using MF radars at Davis (69°S, 78°E), Syowa (69°S, 40°E) and Rothera (68°S, 68°W) in the Antarctic and Poker Flat (65°N, 147°W) and Andenes (69°N, 16°E) in the Arctic. Mean w...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/44649 2023-05-15T13:25:21+02:00 Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings Dowdy, A. Vincent, R. Tsutsumi, M. Igarashi, K. Murayama, Y. Singer, W. Murphy, D. Riggin, D. 2007 http://hdl.handle.net/2440/44649 https://doi.org/10.1029/2006JD008127 en eng Amer Geophysical Union Journal of Geophysical Research, 2007; 112(17):017105-1-017105-14 0148-0227 2169-8996 http://hdl.handle.net/2440/44649 doi:10.1029/2006JD008127 Vincent, R. [0000-0001-6559-6544] Copyright 2007 by the American Geophysical Union http://www.agu.org/pubs/crossref/2007/2006JD008127.shtml middle atmosphere dynamics sudden warmings planetary and gravity waves Journal article 2007 ftunivadelaidedl https://doi.org/10.1029/2006JD008127 2023-02-06T07:19:45Z The dynamical response of the polar mesosphere and lower thermosphere (MLT) to sudden stratospheric warmings is investigated using MF radars at Davis (69°S, 78°E), Syowa (69°S, 40°E) and Rothera (68°S, 68°W) in the Antarctic and Poker Flat (65°N, 147°W) and Andenes (69°N, 16°E) in the Arctic. Mean winds, gravity waves and planetary waves are investigated during sudden stratospheric warmings, and comparisons are made with climatological means. The available MF radar data set includes six major sudden stratospheric warmings in the Northern Hemisphere and the unprecedented 2002 Southern Hemisphere major stratospheric warming. Three of the six northern events are relatively weak and could almost be classed as minor warmings, while the larger three have similar characteristics to the event in the Southern Hemisphere. Zonal wind reversals associated with the major warmings in both hemispheres are generally weaker and earlier by several days in the mesosphere than in the stratosphere. There are, however, significant differences between locations in their response to stratospheric warmings. The zonal winds are remarkably weaker than average during both winter and spring around the time of the southern major warming of 2002, but these effects are not observed for the Northern Hemisphere events. Gravity wave activity is found to vary significantly between individual stratospheric warming events and also between individual locations. Andrew J. Dowdy, Robert A. Vincent, Masaki Tsutsumi, Kiyoshi Igarashi, Yasuhiro Murayama, Werner Singer, Damian J. Murphy, D. M. Riggin Article in Journal/Newspaper Andenes Antarc* Antarctic Arctic The University of Adelaide: Digital Library Antarctic Arctic Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) The Antarctic Journal of Geophysical Research 112 D17 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
middle atmosphere dynamics sudden warmings planetary and gravity waves |
spellingShingle |
middle atmosphere dynamics sudden warmings planetary and gravity waves Dowdy, A. Vincent, R. Tsutsumi, M. Igarashi, K. Murayama, Y. Singer, W. Murphy, D. Riggin, D. Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings |
topic_facet |
middle atmosphere dynamics sudden warmings planetary and gravity waves |
description |
The dynamical response of the polar mesosphere and lower thermosphere (MLT) to sudden stratospheric warmings is investigated using MF radars at Davis (69°S, 78°E), Syowa (69°S, 40°E) and Rothera (68°S, 68°W) in the Antarctic and Poker Flat (65°N, 147°W) and Andenes (69°N, 16°E) in the Arctic. Mean winds, gravity waves and planetary waves are investigated during sudden stratospheric warmings, and comparisons are made with climatological means. The available MF radar data set includes six major sudden stratospheric warmings in the Northern Hemisphere and the unprecedented 2002 Southern Hemisphere major stratospheric warming. Three of the six northern events are relatively weak and could almost be classed as minor warmings, while the larger three have similar characteristics to the event in the Southern Hemisphere. Zonal wind reversals associated with the major warmings in both hemispheres are generally weaker and earlier by several days in the mesosphere than in the stratosphere. There are, however, significant differences between locations in their response to stratospheric warmings. The zonal winds are remarkably weaker than average during both winter and spring around the time of the southern major warming of 2002, but these effects are not observed for the Northern Hemisphere events. Gravity wave activity is found to vary significantly between individual stratospheric warming events and also between individual locations. Andrew J. Dowdy, Robert A. Vincent, Masaki Tsutsumi, Kiyoshi Igarashi, Yasuhiro Murayama, Werner Singer, Damian J. Murphy, D. M. Riggin |
format |
Article in Journal/Newspaper |
author |
Dowdy, A. Vincent, R. Tsutsumi, M. Igarashi, K. Murayama, Y. Singer, W. Murphy, D. Riggin, D. |
author_facet |
Dowdy, A. Vincent, R. Tsutsumi, M. Igarashi, K. Murayama, Y. Singer, W. Murphy, D. Riggin, D. |
author_sort |
Dowdy, A. |
title |
Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings |
title_short |
Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings |
title_full |
Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings |
title_fullStr |
Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings |
title_full_unstemmed |
Polar mesosphere and lower thermosphere dynamics: 2. Response to sudden stratospheric warmings |
title_sort |
polar mesosphere and lower thermosphere dynamics: 2. response to sudden stratospheric warmings |
publisher |
Amer Geophysical Union |
publishDate |
2007 |
url |
http://hdl.handle.net/2440/44649 https://doi.org/10.1029/2006JD008127 |
long_lat |
ENVELOPE(-68.130,-68.130,-67.568,-67.568) |
geographic |
Antarctic Arctic Rothera The Antarctic |
geographic_facet |
Antarctic Arctic Rothera The Antarctic |
genre |
Andenes Antarc* Antarctic Arctic |
genre_facet |
Andenes Antarc* Antarctic Arctic |
op_source |
http://www.agu.org/pubs/crossref/2007/2006JD008127.shtml |
op_relation |
Journal of Geophysical Research, 2007; 112(17):017105-1-017105-14 0148-0227 2169-8996 http://hdl.handle.net/2440/44649 doi:10.1029/2006JD008127 Vincent, R. [0000-0001-6559-6544] |
op_rights |
Copyright 2007 by the American Geophysical Union |
op_doi |
https://doi.org/10.1029/2006JD008127 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
D17 |
_version_ |
1766384867679928320 |