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ON THE TRIGGER ACTION OF MERGENCE OF THE CONVECTIVE CLOUD ECHO BANDS GENERATED IN DIFFERENT SOURCES IN FORMATION OF HEAVY-RAIN

Fan Peifen(Department of meteorology, Nanjing University)  
In this paper, the wave-train structure of convective cloud echo bands and inertio-gravitational wave source are qualitatively analysed. It is shown that as the jet stream develops, the strong wind shear generated near the jet stream will excite the formation of inertiogravitational wave with large amplitude. The source region of inertio-gravitational wave is fit for the radar echo band source region. During the period of propagation of inertio-gravitational waves through the conditional unstable atmosphere, the mergence of these waves in suitable region is favourable for promoting the formation of the heavy-rain.
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