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| Titel |
Observation of mesospheric gravity waves at Comandante Ferraz Antarctica Station (62° S) |
| VerfasserIn |
J. V. Bageston, C. M. Wrasse, D. Gobbi, H. Takahashi, P. B. Souza |
| 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. 6 ; Nr. 27, no. 6 (2009-06-26), S.2593-2598 |
| Datensatznummer |
250016572
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2593-2009.pdf |
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| Zusammenfassung |
| An airglow all-sky imager was operated at Comandante Ferraz Antarctica
Station (62.1° S, 58.4° W), between April and October of 2007. Mesospheric gravity waves were observed using the OH airglow
layer during 43 nights with good weather conditions. The waves presented
horizontal wavelengths between 10 and 60 km and observed periods mainly
distributed between 5 and 20 min. The observed phase speeds range between
5 m/s and 115 m/s; the majority of the wave velocities were between 10 and 60 m/s.
The waves showed a preferential propagation direction towards the
southwest in winter (May to July), while during spring (August to October)
there was an anisotropy with a preferential propagation direction towards the
northwest. Unusual mesospheric fronts were also observed. The most probable
wave source could be associated to orographic forcing, cold fronts or strong
cyclonic activity in the Antarctica Peninsula. |
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