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| Titel |
Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations |
| VerfasserIn |
P. Vishnu Prasanth, V. Sivakumar, S. Sridharan, Y. Bhavani Kumar, H. Bencherif, D. Narayana Rao |
| 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. 10 ; Nr. 27, no. 10 (2009-10-07), S.3811-3823 |
| Datensatznummer |
250016671
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3811-2009.pdf |
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| Zusammenfassung |
| In this paper, we present seasonal and nocturnal variations of mesospheric
sodium (Na) layer parameters observed over Gadanki (13.5° N, 79.2° E),
based on 166 nights during the period from January 2005 to December
2006, for the first time. The total Na content decreases during the evening
and reaches a minimum value around midnight and maximum in the early
morning. The year-to-year variations illustrate that Na layers reach the
peak value close to 93.5 km for the year 2005 and ~93 km for the year
2006 and falls to near zero value around 110 km. Though, seasonal variation
of sodium density illustrate maximum values in September, December and
March, we require a larger data base for September months to conclude the
statement. The column abundance shows maximum during autumn equinox and
minimum during winter. The obtained seasonal and nocturnal variation of
sodium layer parameters are compared with mid-latitude observations and
further possible mechanisms are discussed. |
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