"麦莎"台风影响期间浙江的大风分布特征和成因分析

分析了“麦莎”台风引起浙江省的大风分布特征和成因,指出受“麦莎”影响,大风过程历时之长、强风持续时间之久、分布范围之广属历史罕见;其成因在于“麦莎”台风本身的强度大是本次强风出现的基础因子,“麦莎”台风的西北行路径特点和较慢移速是大风持续时间长、影响范围大的重要保证,“麦莎”台风与周围天气系统的相互作用是导致大风出现和偏态分布的直接诱因,浙江省的特殊地形也是促成大风出现并呈偏态分布的有利因素。

Study on Matsa's Gale Characteristics Occurred in Zhejiang Province and Their Formation

In the paper, we summarized the gale characteristics,which were caused by the Matsa tropical cyclone over Zhejiang Province in 2005, and analyzed their formation. The characteristics show that the long period of the gale duration, the large scale of time and space of the gust are rare in the history. The analysis revealed that the intensive Matsa is the basic factor. Matsa's north-westward track and slow moving velocity ensured the gale persistence. The interaction between neighbouring systems is the main direct cause of gale unsymmetrical distribution. The special terrain of Zhejiang Province was also availed to occurrence of gale unsymmetrical distribution.