Specific features of the acoustic-gravity wave propagation in the Solar chromosphere
Some new features of the acoustic-gravity wave propagation from the sources at the photospheric heights through a nonisothermic solar chromosphere are examined. Within the framework of the plane-layered model of the atmosphere some properties of the wave perturbations near the height at which the horizontal phase wave velocity coincides with the local sound velocity are studied. At this height, a resonance singularity in the pressure disturbance occurs and above the resonance level the wave field is absent. The results of numerical calculation of the wave field by means of the full-wave numerical model are given for the experimentally known altitude temperature profile. The conclusion is made that a relatively high-frequency acoustic branch of acoustic-gravity waves with periods less than two minutes does not contribute to the vertical energy flux through the chromosphere.