Two-frequency approach to the theory of atmospheric acoustic-gravity waves

Abstract: The propagation of acoustic-gravity waves (AGWs) in the stratified isothermal atmosphere is analyzed using methods of the oscillation theory. It is shown that AGW in the atmosphere can be considered as an oscillatory process occurring at two eigenfrequencies. This consideration makes it possible to explain some of the observed properties of AGWs. The solutions for perturbed hydrodynamic velocity versus time and spectral characteristics are obtained in a real, but not complex, variables.