【摘要】 采用MM5模式,以2000年10号(0010)台风“碧利斯”为个例,选取台风登陆前后时段,采用不同地形高度来模拟该时段台风暴雨过程.试验结果表明福建东部沿海的特殊地形对登陆福建中部沿海的台风暴雨有着明显的增幅作用.用3个不同区域每隔3h面雨量作比较,并通过对不同方案的垂直风速及不同时段的水平流场进行分析,可见其地形对台风暴雨的最大增幅作用发生在山脉迎风坡的地形坡度与气流正交速度乘积最大的时段.更多还原

【Abstract】 By using MM5 model, the work choosed the landing process of typhoon 0010 “Bilis”, and adopted four methods, i.e. no changing topographic height, double topographic height, half topographic height and erased topographic to simulate the typhoon rainstorm of “Bilis” landing (period.) The simulation data indicated that the special topographic along the eastern Fujian coast could enhance the typhoon rainstorm distinctly. By comparing the face rain of every three hours in three different regions, and analyzing the vertical velocity in different schemes and the horizontal flow field during different time intervals, it was found that when the multiplied result of mountainous gradient and vertical cross wind velocity reached the maximum, the topographic had most notable effect on enhancing typhoon rainstorm.更多还原