SOME FEATURES OF PLANETARY WAVES IN THE MIDDLE ATMOSPHERE IN 1980

Planetary waves and its propagation are very important in the middle atmosphere.Meteorologists have done a lot of researches on how the planetary waves vary in time-scales. Using the Nimbus 7 satelite grid data, this paper is concentratad on diagnosis and analysis of the Spatial structure of the planetary waves in the middle atmosphere in l98O. The results show that perturbations are mainly in the winter hemisphere and relatively weak in the summer hemisphere as well as equatorial areasl but can not be ignored. The transient waves which propagate to the summer hemisphere across equator is mainly through two height channels-2Okm and 70km. The standing waves stay in winter hemisphere. The attenuation of the amplitude from winter to summer can be found in wave l and wave 2. The energy in wave 3 neariy remains constant.