摘要
通过对40年广西台风大风实测资料的研究,分析了台风灾害性大风的时空分布特征,探讨其成因机制,进一步分析了各种灾害强度大风和各灾害地区大风的月分布特征及台风路径的差异性。分析表明:广西台风灾害性大风的气候分布特征为东南多,西北少,是特定的台风流场结构与广西地理地形条件相互作用的结果,并与台风活动路径和中心风力有关。大中范围风灾的高峰值出现在7月,小范围风灾的高峰值出现在8月。桂西南、桂南沿海和桂中地区台风大风主要由1类路径的台风引起,桂东南和桂东地区则受1、2类路径的台风影响。40年内共有238个台风影响广西,其中148个造成大风,造成大风的台风中约10.8%造成15站以上大范围风灾。值得注意的是,造成大范围风灾的均为进入北部湾北部海面的强台风。
Through the research on 40 years＇ data of typhoon and gale in Guangxi, the characteristics of spatio - temporal distribution of typhoon and gale are analyzed and the causes are discussed in this paper. The characteristics of monthly distribution of gales with different disaster intensities in different areas, and dissimilarity of typhoon paths are also studied. The distribution analysis shows that SE disastrous gales are more than NW gales in in Guangxi. It is the result of interaction of the specific structure of typhoon current field with geographic and topographic condition. It is related with typhoon path and the central wind force. The large and moderate-scale gale disasters mainly occur in July and some small-scale ones occur in August. The SE typhoon and gales in southwestern and southern coastal area and central Guangxi are mainly caused by SE typhoon, and typhoon and gales in southeastern and eastern Guangxi are caused jointly by SE and NW typhoon. There are 238 typhoons impacting Guangxi in the past 40 years. Among them, 148 cause gales and 10% of typhoon result in gale damage to more than 15 stations. Noticeably, the large-scale damage is mainly caused by strong typhoon going into the north sea of Beibu gulf.
出处
《灾害学》
CSCD
2007年第1期13-17,共5页
Journal of Catastrophology
基金
广西科学基金项目(桂科攻0592005-2B
桂科攻0428008-40)
广西气象局重点项目(200401)
关键词
台风大风
气象灾害
气候特征
广西
typhoon gale
meteorological disaster
climate characteristic
Guangxi
