Abstract:

Based on six － hour reanalysis data at 1° × 1° spatial resolution from NCEP/NCAR and conventional meteorological data，the influence of the circulation background ， double typhoon effect ，cold air activities and the underlying surface of sea and land on the moving path of Damrey typhoon was analyzed comprehensively． The results are as follows: (1) The moving path of Damrey typhoon in landing bended to the west due to the 500 hPa subtropical high shifting eastward and the strip distribution adjusting to the block，adsorption effect of Saola typhoon strengthening，and the Damrey typhoon traveling toward the warm SST area away from the area of cold SST． (2) The resistance of the mountains and hills in the middle of Shandong Province leaded to the second shifting direction of the typhoon． In addition，the westward obvious extension of the 588 line of subtropical high，the increase of eastward movement component of typhoon due to the southwesterly airflow on the edge of the subtropical high，the westward movement component weakened and disappeared of typhoon because of the development and moving southward of shortwave trough in westerly circulation，and the adsorption of Saola and Damrey typhoons weakened rapidly owing to the decrease of the intensity and the increase of the distance between them also played important roles to the second shifting direction of the typhoon．

Key words:
typhoon, the moving path, rainstorm, causes

摘要：

利用NCEP/NCAR 1°×1°的6 h再分析资料和常规气象观测资料，综合分析了环流背景、双台风效应”、冷空气活动和海陆下垫面对台风“达维”移动路径变化的影响，结果表明:(1)台风路径在登陆时第1次发生西折的主要原因是500 hPa副高东撤并由带状调整为块状分布，台风“苏拉”对“达维”吸附作用加强，且台风避开冷SST区趋向暖SST区行进;(2)鲁中山区的地形对台风第2次转向起到重要的阻挡作用，副高588线西伸明显，而副高边缘的西南气流增加了台风的东移分量，西风环流上短波槽的发展南下使台风向西移动的分量减弱消失，双台风强度的减弱和距离的增加使台风的吸附作用迅速减弱，这些因素共同导致了台风第2次转向。

关键词: 台风, 路径, 暴雨, 成因