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| Titel |
Gravity wave signatures at mesopause heights |
| VerfasserIn |
R. Rüster, P. Czechowsky, P. Hoffmann, W. Singer |
| 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 ; 14, no. 11 ; Nr. 14, no. 11, S.1186-1191 |
| Datensatznummer |
250012470
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| Publikation (Nr.) |
 copernicus.org/angeo-14-1186-1996.pdf |
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| Zusammenfassung |
| The ALOMAR SOUSY Radar operated at 53.5 MHz
has been used in a five-beam configuration to study dynamical processes at
gravity wave periods in the summer polar mesosphere. A case study of a gravity
wave with a period of about 9 min is presented and analysed in some detail. The
three-dimensional wave number vector is determined from the phase information of
the 9-min velocity oscillations obtained in all beam directions and all range
gates. The horizontal wavelengths in the north and east direction are estimated
to be about 60 and 50 km, respectively. The echo power variations,
simultaneously observed at different beam pointing positions, are investigated
using cross-correlation analysis. The results show that these wave-associated
variations lead to horizontal and vertical deformation of the echoing layers.
The horizontal wavelength in the north-south direction, derived from the echo
power modification, is in good agreement with the one obtained from the velocity
analysis. |
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