Numerical Simulation of the Effects of Mesoscale Topography in a Heavy Rain Process
暴雨过程中中尺度地形作用的数值试验

By use of the mesoscale model (MM4) from PSU / NCAR, a strong rainfall event during 4-5 July 1991 in the mountain area of the Zhejiang-Anhui provinces is simulated. It is found that the mesoscale mountain has significant influence on the location and intensity of the heavy rain area, the center of the heavy rain is located over the mountain area. Analysis off numerical simulation of CTR and NHT shows that the effects of the orographic dynamics and barrier on airflow plays an important role in the development of unstability. The moisture and heat in the mountain area play similar roles.