地形对台风影响的数值模拟研究——以台风“泰利”为例

Numerical simulation of topography influence on typhoon

为研究台湾岛地形对台风移动路径及结构的影响,利用高分辨率中尺度MM5V3模式,设计3组敏感性试验,对"0513"号台风"泰利"在2005年8月31日00:06到9月1日18:00(世界时)影响台湾岛的过程进行数值模拟研究。主要就台湾岛地形对台风移动路径、气压场、散度场、涡度场和降水场进行分析。试验结果表明:台湾岛地形对台风"泰利"的移动路径和中心气压的影响不显著;地形的强迫作用对台风涡度场的中心强度和非对称结构有明显的影响;台湾岛地形是形成迎风坡诱生低压和背风坡诱生高压的主要因子;地形是台风外围降水加强的主要原因。

In order to study the Taiwan topography influence on the typhonic movement and structure ＂0513＂ typhoon ＂Talim＂ which affected Taiwan province from six o＇ clock Aug. 31,2005 to eighteen o＇ clock Sept. 1, 2005 （GMT） is numerically simulated by three sets of sensitive experiments with high-resolution mesoscale model MM5V3. The Taiwan topography impact on the movement, air pressure, diversity, turbine and precipitation of the Typhoon is an- alyzed. It shows that the Taiwan topography influence on the movement and the central air pressure is salience. The topography force influence on the typhonic central intensity and unsymmertrical structure is very evident. The Tai- wan topography is the primary reason for the low pressure in the windward mountain and high pressure in the leeward mountain. The topography is the primary reason for the peripheral precipitation reinfor4ce of the typhoon.