Abstract—
A new approach to the study of acoustic-gravity waves in the Earth’s atmosphere in the presence of vertical temperature inhomogeneity is proposed. Using this approach, the local AGW dispersion equation was obtained for the atmosphere with a small vertical temperature gradient. The modification of the acoustic and gravitational regions of freely propagating AGWs on the spectral plane \(\left( {\omega ,{{k}_{x}}} \right)\) depending on the temperature gradient was investigated. It is shown that the acoustic and gravitational regions approach each other with a positive temperature gradient, while the distance between them increases with a negative gradient. On the spectral plane, the indicators of the location of the acoustic and gravitational regions of freely propagating AGWs are the dispersion curves of the non-divergent and inelastic horizontal wave modes. The possibility of overlapping the acoustic and gravitational regions of AGWs in a nonisothermal atmosphere was investigated.
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Funding
The study was supported by grant 2020.02/0015 “Theoretical and experimental studies of global perturbations of natural and artifical origin in the Earth-atmosphere-ionosphere system” of National Research Foundation of Ukraine. Rapoport Yu.G. is thankful to the Ministry of Education and Science of Ukraine for the support of the present work by grant 20БФ051-02 “Wave processes and effects in active resonant layered plasma media and metamaterials”.
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Fedorenko, A.K., Kryuchkov, E.I., Cheremnykh, O.K. et al. Influence of Vertical Heterogeneity of Atmospheric Temperature on the Propagation of Acoustic-Gravity Waves. Kinemat. Phys. Celest. Bodies 36, 253–264 (2020). https://doi.org/10.3103/S0884591320060033
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DOI: https://doi.org/10.3103/S0884591320060033