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NONLINEAR GRAVITATIONAL WAVES AND THE INSTABILITY OF THE ATMOSPHERE
1 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
2 Space Research Institute, Russian Academy of Sciences
2 Space Research Institute, Russian Academy of Sciences
Journal: Geophysical processes and biosphere
Tome: 17
Number: 3
Year: 2018
Pages: 5-17
UDK: 532
DOI: 10.21455/GPB2018.3-1
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Onishchenko O.G., Pokhotelov O.A., Astafieva N.M. NONLINEAR GRAVITATIONAL WAVES AND THE INSTABILITY OF THE ATMOSPHERE // . 2018. Т. 17. № 3. С. 5-17. DOI: 10.21455/GPB2018.3-1
@article{OnishchenkoNONLINEAR2018,
author = "Onishchenko, O. G. and Pokhotelov, O. A. and Astafieva, N. M.",
title = "NONLINEAR GRAVITATIONAL WAVES AND THE INSTABILITY OF THE ATMOSPHERE",
journal = "Geophysical processes and biosphere",
year = 2018,
volume = "17",
number = "3",
pages = "5-17",
doi = "10.21455/GPB2018.3-1",
language = "English"
}
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Keywords: atmosphere, vortices, a model of vortices, nonlinear structure, ideal hydrodynamics
Аnnotation: A review of the main results of the study of dust devils with special attention to the mechanism of generation of vortices in an unstable stratified atmosphere is presented. A new nonlinear model of generation of convective motions and dust vortices in an unstable stratified atmosphere is developed in the approximation of ideal hydrodynamics. Using nonlinear equations for internal gravity waves, the model of generation of convective cell plumes is investigated in axially-symmetric approximation. It is shown that in a convectively unstable atmosphere with large-scale seed turbulence, small-scale intense vertical vortices are formed from the plumes extremely rapidly. The structure of radial, vertical and toroidal velocity components in such vortices is investigated. The structure of the vertical vorticity and the toroidal speed in the tight radius areas of the vortex is analysed.
