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| Titel |
Acoustic gravity wave growth and damping in convecting plasma |
| VerfasserIn |
T. R. Robinson |
| 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 ; 12, no. 2/3 ; Nr. 12, no. 2/3, S.210-219 |
| Datensatznummer |
250010322
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| Publikation (Nr.) |
 copernicus.org/angeo-12-210-1994.pdf |
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| Zusammenfassung |
| The propagation of acoustic gravity waves
through steadily convecting plasma in the thermosphere has been analysed
theoretically. The growth and damping rates of internal gravity waves due to the
feedback effects of wave-modulated Joule heating and Laplace forcing have been
calculated. It is found that large convection flow velocities lead to the growth
of large-scale internal gravity waves, whilst small- and medium-scale waves are
heavily damped, under similar conditions. It has also been shown that wave
growth is favoured for waves travelling against the plasma flow direction. The
effects of critical coupling when wave phase speeds match the plasma flow speed
have also been investigated. The results of these calculations are discussed in
the context of the atmospheric energy budget and thermosphere-ionosphere
coupling. |
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