Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming
The present paper analyses the variations of daytime mesopause temperature over an equatorial station during polar Stratospheric Sudden Warming (SSW) events, indicating a possible dynamical coupling between the two regions, through the intensification of planetary wave activity. The amplified wave s...
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ftindianacasci:oai:repository.ias.ac.in:96061 2023-05-15T17:39:50+02:00 Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming Vineeth, C. Pant, T. K. Kumar, K. K. Ramkumar, G. Sridharan, R. 2009 http://repository.ias.ac.in/96061/ http://www.agu.org/pubs/crossref/2009/2009GL040375.shtml unknown American Geophysical Union Vineeth, C. Pant, T. K. Kumar, K. K. Ramkumar, G. Sridharan, R. (2009) Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming Geophysical Research Letters, 36 . L20104. ISSN 0094-8276 QE Geology Article PeerReviewed 2009 ftindianacasci 2013-01-20T13:51:04Z The present paper analyses the variations of daytime mesopause temperature over an equatorial station during polar Stratospheric Sudden Warming (SSW) events, indicating a possible dynamical coupling between the two regions, through the intensification of planetary wave activity. The amplified wave signatures of quasi-16 day period have been seen in the Equatorial Mesopause Temperature (EMT) and Polar Stratospheric Temperature (at 10 hPa) during the course of the SSW. The EMT measurements were made from Trivandrum (8.5°N, 76.5°E), an equatorial station in India and the stratospheric temperatures were obtained from NCEP/NCAR reanalysis. This investigation reveals (1) an overall enhancement and amplified wave activity in the EMT prior to the SSW and (2) propagation of a wave disturbance from equatorial stratosphere to North Pole in about a month. These results are new and reveal some newer aspects of the SSW and its equatorial effects. Article in Journal/Newspaper North Pole Indian Academy of Sciences: Publication of Fellows North Pole |
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Open Polar |
collection |
Indian Academy of Sciences: Publication of Fellows |
op_collection_id |
ftindianacasci |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Vineeth, C. Pant, T. K. Kumar, K. K. Ramkumar, G. Sridharan, R. Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming |
topic_facet |
QE Geology |
description |
The present paper analyses the variations of daytime mesopause temperature over an equatorial station during polar Stratospheric Sudden Warming (SSW) events, indicating a possible dynamical coupling between the two regions, through the intensification of planetary wave activity. The amplified wave signatures of quasi-16 day period have been seen in the Equatorial Mesopause Temperature (EMT) and Polar Stratospheric Temperature (at 10 hPa) during the course of the SSW. The EMT measurements were made from Trivandrum (8.5°N, 76.5°E), an equatorial station in India and the stratospheric temperatures were obtained from NCEP/NCAR reanalysis. This investigation reveals (1) an overall enhancement and amplified wave activity in the EMT prior to the SSW and (2) propagation of a wave disturbance from equatorial stratosphere to North Pole in about a month. These results are new and reveal some newer aspects of the SSW and its equatorial effects. |
format |
Article in Journal/Newspaper |
author |
Vineeth, C. Pant, T. K. Kumar, K. K. Ramkumar, G. Sridharan, R. |
author_facet |
Vineeth, C. Pant, T. K. Kumar, K. K. Ramkumar, G. Sridharan, R. |
author_sort |
Vineeth, C. |
title |
Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming |
title_short |
Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming |
title_full |
Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming |
title_fullStr |
Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming |
title_full_unstemmed |
Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming |
title_sort |
signatures of low latitude–high latitude coupling in the tropical mlt region during sudden stratospheric warming |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://repository.ias.ac.in/96061/ http://www.agu.org/pubs/crossref/2009/2009GL040375.shtml |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
North Pole |
genre_facet |
North Pole |
op_relation |
Vineeth, C. Pant, T. K. Kumar, K. K. Ramkumar, G. Sridharan, R. (2009) Signatures of low latitude–high latitude coupling in the tropical MLT region during sudden stratospheric warming Geophysical Research Letters, 36 . L20104. ISSN 0094-8276 |
_version_ |
1766140604349153280 |