Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/19514
Title: Acoustic gravity wave growth and damping in convecting plasma
Authors: Robinson T. R.
First Published: 1-Apr-1994
Publisher: SPRINGER VERLAG
Citation: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1994, 12 (2-3), pp. 210-219
Abstract: 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.
DOI Link: 10.1007/s00585-994-0210-5
ISSN: 0992-7689
Links: http://hdl.handle.net/2381/19514
http://www.ann-geophys.net/12/210/1994/angeo-12-210-1994.html
Type: Journal Article
Rights: Copyright © European Geosciences Union 1994
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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