Articles | Volume 22, issue 20
https://doi.org/10.5194/acp-22-13713-2022
https://doi.org/10.5194/acp-22-13713-2022
Research article
 | 
24 Oct 2022
Research article |  | 24 Oct 2022

Decay times of atmospheric acoustic–gravity waves after deactivation of wave forcing

Nikolai M. Gavrilov, Sergey P. Kshevetskii, and Andrey V. Koval

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Latest update: 30 May 2024
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Short summary
We make high-resolution simulations of poorly understood decays of nonlinear atmospheric acoustic–gravity waves (AGWs) after deactivations of the wave forcing. The standard deviations of AGW perturbations, after fast dispersions of traveling modes, experience slower exponential decreases. AGW decay times are estimated for the first time and are 20–100 h in the stratosphere and mesosphere. This requires slow, quasi-standing and secondary modes in parameterizations of AGW impacts to be considered.
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