Acoustic-gravity waves in the atmosphere: from Zakharov equations to wave-kinetics

We develop a wave-kinetic description of acoustic-gravity (AG) waves in the atmosphere. In our paper the high frequency spectrum of waves is described as a gas of quasi-particles. Starting from the Zakharov-type of equations, where coupling between fast and slow density perturbations is considered,...

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Bibliographic Details
Published in:Physica scripta 2015-05, Vol.90 (5), p.55001-4
Main Authors: Mendonca, J T, Stenflo, L
Format: Article
Language:English
Subjects:
acoustic-gravity waves
Acoustics
Atmospheres
Density
Dispersions
High frequencies
Joining
Mathematical analysis
Nonlinearity
Wigner function
Zakharov equations
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Summary:We develop a wave-kinetic description of acoustic-gravity (AG) waves in the atmosphere. In our paper the high frequency spectrum of waves is described as a gas of quasi-particles. Starting from the Zakharov-type of equations, where coupling between fast and slow density perturbations is considered, we derive the corresponding wave-kinetic equations, written in terms of an appropriate Wigner function. This provides an alternative description for the nonlinear interaction between the two dispersion branches of the AG waves.
ISSN:0031-8949
1402-4896
1402-4896
DOI:10.1088/0031-8949/90/5/055001