Аннотация:Tidal theory analysis and 2D numerical modeling of wave structure show the possibility of resonant Rossby waves excitation for zonal wavenumber m = 1. The non-zonal component of ozone distribution and 27-days oscillations of solar UV radiation contribute in the source of excitation. The model equations are the quasigeostrophic vorticity equation, the energy conservation equation and the continuity equation. Model runs show that large-scale transient waves may be really generated in the middle atmosphere when atmospheric resonant characteristics do not vary dramatically. So the energy of a weak perturbation in solar activity may be accumulated in the Earth's atmosphere as Rossby wave motions. These waves look like barotropic motions and depend on zonal wind and characteristics of solar 27-days oscillations.