Taori, A. ; Kamalakar, V. ; Jayaraman, A. (2012) First observation of upper mesospheric semi annual oscillations using ground based airglow measurements from Indian low latitudes Advances in Space Research, 49 (5). pp. 937-942. ISSN 0273-1177
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.asr.2011.12.016
Abstract
We summarize two years of Mesosphere Lower Thermosphere Photometer (MLTP) operation of mesospheric OH and O2 emission monitoring. The deduced mesospheric OH and O2 temperatures show large variability. Nightly temperature variations over Gadanki (13.5°N, 79.2°E) are dominated by the short period wave features, while tidal amplitudes are relatively small. Our measurements are the first to report a long period seasonal variation at two upper mesospheric altitudes simultaneously over the Indian sector. Our observations reveal the presence of a dominant semi-annual oscillation (∼6 months periodicity) together with a shorter period (∼2.5 months periodicity) oscillation in both OH and O2 data.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Committee on Space Research. |
| Keywords: | Mesosphere; Temperature; Wave; Tides; Seasonal Variation; Semiannual Oscillation |
| ID Code: | 95755 |
| Deposited On: | 26 Nov 2012 09:53 |
| Last Modified: | 26 Nov 2012 09:53 |
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