Simulation of Propagation of Acoustic-Gravity Waves Generated by Tropospheric Front Instabilities into the Upper Atmosphere
作者： S. Kshevetskii , Yu. Kurdyaeva , S. Kulichkov , E. Golikova , O. Borchevkina
DOI: 10.1007/S00024-020-02569-Y
关键词:
摘要: A numerical model of the propagation acoustic-gravity waves excited by pressure fluctuations on Earth’s surface is developed. Propagation generated instabilities tropospheric fronts into upper atmosphere simulated. The experimental data atmospheric variations during 2016 year registered a net four microbarographs located in Moscow region are processed. case very significant (up to 30 times larger than average level) selected, which were caused an front arrival. Observed field for this approximated and used as lower boundary condition simulating vertical wave propagation. simulations showed that just after source activation, infrasonic may have amplitudes perturbations temperature up 100 K, horizontal velocity 60 m/s. Internal gravity come later far horizontally away from source. influence limited dimensions computational domain simulation results investigated. conditions at boundaries domain, allow runaway beyond proposed. frequency spectrum non-isothermal analyzed.
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