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| Titel |
Equatorial counter electrojets and polar stratospheric sudden warmings – a classical example of high latitude-low latitude coupling? |
| VerfasserIn |
C. Vineeth, T. Kumar Pant, R. Sridharan |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 8 ; Nr. 27, no. 8 (2009-08-12), S.3147-3153 |
| Datensatznummer |
250016620
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3147-2009.pdf |
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| Zusammenfassung |
| Favored occurrences of Equatorial Counter Electrojets (CEJs) with a quasi
16-day periodicity over Trivandrum (8.5° N, 76.5° E, 0.5° N
diplat.) in association with the polar Stratospheric Sudden Warming (SSW)
events are presented. It is observed that, the stratospheric temperature at
~30 km over Trivandrum shows a sudden cooling prior to the SSWs and
the CEJs of maximum intensity which occurs around this time. In general
stronger CEJs are associated with more intense SSW events. The stratospheric
zonal mean zonal wind over Trivandrum also exhibits a distinctly different
pattern during the SSW period. These circulation changes are proposed to be
conducive for the upward propagation of the lower atmospheric waves over the
equatorial latitudes. The interaction of such waves with the tidal
components at the upper mesosphere and its subsequent modification are
suggested to be responsible for the occurrence of CEJs having planetary wave
periods. |
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