影响福建沿海的0010号“碧利斯”台风暴雨的地形敏感性试验  

Topographic sensitivity test for rainstorm of the typhoon 0010 “Bilis” influencing Fujian coast land

作　　者：吴启树[1] 沈桐立[1] 李双锦[2] 

机构地区：[1]南京气象学院大气科学系 [2]福建省气象台,福建福州350001

出　　处：《台湾海峡》2005年第2期236-242,共7页Journal of Oceanography In Taiwan Strait

基　　金：国家自然科学基金资助项目(40075023)

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.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.

关 键 词：台风暴雨 敏感性试验 福建沿海 增幅作用 MM5模式 2000年 台风登陆 特殊地形 东部沿海 试验结果 暴雨过程 地形高度 地形坡度 时段 面雨量 迎风坡 风速 气流 

分 类 号：P444[天文地球—大气科学及气象学] S948[农业科学—水产养殖]