A heavy rainfall on 4 September, 2004 in Chongqing area is simulated by MM5 mesoscale numerical model. The simulation results show that the rainfall area and quantity are simulated quite well. It shows that the simulation density and center of southwest vortex are nearly the same as the weather analysis,according to analysis the mesoscale weather system generates the heavy rainfall. A physical concept model of the generation condition of heavy rainfall and rainfall area distribution is found according to physical quantity analysis of high-low level.The vapor's transportation and convergence from low level to high level is inclined to east along with the southeast current. The rain distribution relates to mid-high level such as 500hPa~300 hPa,and rain intensity relates to the density and hight of vertical current.
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周國兵,沈桐立,韓余.重慶"9·4"特大暴雨天氣過程數(shù)值模擬分析.氣象科學,2006,(5):572-577 Zhou Guobing, Shen Tongli, Han Yu. NUMERICAL SIMULATION ANALYSIS OF A HEAVY RAINFALL IN CHONGQING AREA ON 4 SEPTEMBER 2004. Journal of the Meteorological Sciences,2006,(5):572-577