Wave interactions in midlatitude middle atmosphere of the Earth

Abstract

Investigation of wave interactions in heights of the upper mesosphere - lower thermosphere is accomplished using time series of zonal and meridional winds. These time series are acquired in Kazan State University (56N, 49E) by radio meteor observations. Applied bispectral analysis shows expressed non-linier interactions of wave processes with tidal scales (12 and 24 hours) and planetary wave scales (so-called as normal Rossby modes with periods 5, 10, 16 days).