Vineeth, C. ; Pant, Tarun Kumar ; Devasia, C. V. ; Sridharan, R. (2007) Highly localized cooling in daytime mesopause temperature over the dip equator during counter electrojet events: first results Geophysical Research Letters, 34 . L14101_1-L14101_5. ISSN 0094-8276
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Official URL: http://www.agu.org/pubs/crossref/2007/2007GL030298...
Related URL: http://dx.doi.org/10.1029/2007GL030298
Abstract
The first observations of lowering of mesopause temperature during Counter Electrojet (CEJ) events over a narrow region of ˜ ±150 km centered at around magnetic equator are presented. The daytime mesopause temperature is measured over Trivandrum (8.5°N; 77°E; dip lat. 0.5°N), India using the ground based Multiwavelength Dayglow Photometer. The unique meridional scanning capability of the instrument is extensively used in this study. A lowering of temperature by as much as ˜25 K has been observed during certain CEJ events, which includes a few partial CEJs. The gravity wave tidal interaction through vertically upward wind is proposed to be manifesting as lowering in the mesopause temperature and also as CEJ. These observations are 'new' and address to the issues concerning the vertical coupling processes prevailing in the equatorial Mesosphere Lower Thermosphere Ionosphere (MLTI) region.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Geophysical Union. |
| Keywords: | Mesopause; Gravity Waves and Tides; Counter Electrojet |
| ID Code: | 89686 |
| Deposited On: | 30 Apr 2012 15:02 |
| Last Modified: | 30 Apr 2012 15:02 |
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