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- W1964525015 abstract "Acoustic-gravity waves (AGWs) observed in the upper atmosphere may be generated near the Earth’s surface due to a variety of meteorological sources. Two-dimensional simulations of vertical propagation and breaking of nonlinear AGWs in the atmosphere are performed. Forcing near the Earth’s surface is used as the AGW source in the model. We use a numerical method based on finite-difference analogues of fundamental conservation laws for solving atmospheric hydrodynamic equations. This approach selects physically correct generalized solutions of the wave hydrodynamic equations. Numerical simulations are performed in a representative region of the Earth’s atmosphere up to altitude 500 km. Vertical profiles of temperature, density, molecular viscosity and heat conductivity were taken from the standard atmosphere model MSIS-90 for January. Calculations were made for different amplitudes and frequencies of lower boundary wave forcing. It is shown that after activating the tropospheric wave forcing, the initial pulse of AGWs may very quickly propagate to altitudes of 100 km and above and relatively slowly dissipate due to molecular viscosity and heat conduction. This may increase the role of transient nonstationary waves in effective energy transport and variations of atmospheric parameters and gas admixtures in a broad altitude range." @default.
- W1964525015 created "2016-06-24" @default.
- W1964525015 creator A5001080347 @default.
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- W1964525015 date "2013-04-01" @default.
- W1964525015 modified "2023-09-23" @default.
- W1964525015 title "Numerical modeling of propagation of breaking nonlinear acoustic-gravity waves from the lower to the upper atmosphere" @default.
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- W1964525015 doi "https://doi.org/10.1016/j.asr.2012.10.023" @default.
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