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SOLITONIC DISINTEGRATION OF ACOUSTIC-GRAVITY WAVES IN THE ATMOSPHERE: 2. NUMERICAL MODELING
- Authors: Kshevetskii S.P.1,2,3, Kurdyaeva Y.A.4, Gavrilov N.M.3, Kulichkov S.N.2
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Affiliations:
- Immanuel Kant Baltic Federal University
- Oboukhov Institute of Atmospheric Physics RAS
- Saint Petersburg State University
- Kaliningrad Branch of the N.V. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation of the Russian Academy of Sciences
- Issue: Vol 71, No 6 (2025)
- Pages: 855–865
- Section: АТМОСФЕРНАЯ И АЭРОАКУСТИКА
- URL: https://ogarev-online.ru/0320-7919/article/view/375996
- DOI: https://doi.org/10.7868/S3034500625060095
- ID: 375996
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Abstract
The process of propagation and disintegration of long weakly nonlinear acoustic-gravity waves in the upper atmosphere is investigated. A direct numerical solution of the hydrodynamic equations for atmospheric gas is performed using a high-resolution model. Comparison of the results of these numerical simulations with the results of the analysis of the system of hydrodynamic equations based on the KdV-Burgers equation derived in the first part of this work for atmospheric layers showed fairly good agreement. The preferred heights near which AGWs can destroy approximately correspond to the heights of the change in the sign of the horizontal velocity in the wave. The parameters of small-scale solitary secondary waves formed in simulations using full hydrodynamic equations are in good agreement with the estimates based on the analysis of the KdV-Burgers equation. The latter equation does not describe the propagation of secondary waves over time into other atmospheric layers, as well as oscillations, tilts and deformation of the layered structure created by the primary wave, due to the approximations used in deriving the KdV-Burgers equation.
About the authors
S. P. Kshevetskii
Immanuel Kant Baltic Federal University; Oboukhov Institute of Atmospheric Physics RAS; Saint Petersburg State University
Email: spkshev@gmail.com
Kaliningrad, Russia; Moscow, Russia; Saint Petersburg, Russia
Y. A. Kurdyaeva
Kaliningrad Branch of the N.V. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation of the Russian Academy of Sciences
Email: yakurdyaeva@gmail.com
Kaliningrad, Russia
N. M. Gavrilov
Saint Petersburg State University
Email: n.gavrilov@spbu.ru
Saint Petersburg, Russia
S. N. Kulichkov
Oboukhov Institute of Atmospheric Physics RAS
Email: snik1953@gmail.com
Moscow, Russia
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