Numerical simulation of the spectrum of secondary acoustic-gravity waves in the middle and upper atmosphere

Matvey M. Efimov; Nikolai M. Gavrilov; Sergey P. Kshevetskii; Andrey V. Koval

doi:10.1117/12.2690531

17 October 2023 Numerical simulation of the spectrum of secondary acoustic-gravity waves in the middle and upper atmosphere

Matvey M. Efimov, Nikolai M. Gavrilov, Sergey P. Kshevetskii, Andrey V. Koval

Author Affiliations +

Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 127807C (2023) https://doi.org/10.1117/12.2690531
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation

Abstract

Increased attention is currently paid to studying the so-called "secondary" acoustic-gravity waves (AGWs), which appear due to instabilities and nonlinear interactions of "primary" wave modes generated by atmospheric sources. This report is devoted to the study of horizontal spatial spectra of primary and secondary AGWs at fixed altitude levels in the middle and upper atmosphere using a high-resolution three-dimensional nonlinear model AtmoSym. It is found that in a short time after turning on the source of plane waves at the lower boundary of the model, the spectrum contains mainly a peak related to the primary AGW. Later, spectral peaks corresponding to secondary AGWs appear at horizontal wave numbers that are multiples of the wave numbers of the primary wave. This study allows estimating relative contributions of secondary AGWs at different heights, different times, and for different atmospheric conditions.

Citation Download Citation

Matvey M. Efimov, Nikolai M. Gavrilov, Sergey P. Kshevetskii, and Andrey V. Koval "Numerical simulation of the spectrum of secondary acoustic-gravity waves in the middle and upper atmosphere", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 127807C (17 October 2023); https://doi.org/10.1117/12.2690531

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