NUMERICAL EXPERIMENT OF UNSTABLE THEORY FOR MESOSCALE SYSTEM WITH HEAVY RAIN
Ma Yan, Cheng Linshen · Gaoyuan qixiang · 1996
Based on studies of the previous instable theories,a method that unstability problem is solved by initial value problem but not calculating eigenvalue problem is presented Considering the perturbation pressure and moisture,we developed a two-dimension linear nonhydrostatic model which describes comprehensively the characters of the unstable disturbance The fact that the experimental results of symmetric instability and slantwise instability conform to previous theoretical results prove that the method is successful Results of numerical experiment show conditional gravitational instability led to the occurence of the heavy rain during 12:00UTC 5 00:00UTC 6 July,1991