1980年中层大气温度波空间特征的初步分析

SOME FEATURES OF PLANETARY WAVES IN THE MIDDLE ATMOSPHERE IN 1980

利用1980年Nimbus-7卫星网络点资料（温度场）对中层大气行星波的空间结构进行诊断和分析后发现，行星波扰动主要集中于冬半球，夏半球及赤道地区上空的扰动则相对较弱，但也不可忽视.冬半球行星波扰动中的瞬变波部分可以跨过赤道向夏半球传播，且传播主要集中于20kin和70km两个高度层附近.波数1冬季以准定常行里波为主，夏季瞬变行星波与准定常行星波波幅相当.行星波扰动的波幅从冬到夏的衰减主要表现在波数1和波数2上，波数3变化不大.

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.