汕头沿海热带气旋特征分析

通过分析1950～2009年汕头沿岸的热带气旋和1953～2009年汕头风暴潮增水资料,确定汕头地区的增水影响区,并对进入影响区的热带气旋频度、源地、路径、登陆点等要素进行了统计分析,重点分析了影响汕头增水的热带气旋的空间、时间分布特征。结果表明防御风暴潮灾害重点在7～9月,尤其是7月;热带气旋进入影响区以后的路径和登陆地点的不同引发汕头风暴潮增水强度不同,东南-西北行的路径引发增水次数最多,强度最强,西登型和正面登陆型热带气旋较其他登陆类型容易引发较强增水等。所得出的结论,对风暴潮预报具有指导意义,利于开展海洋防灾减灾工作。

Features analysis on tropical cyclone along Shantou Coast

Based on the data of tropical cyclone in coastal regions of Shantou during1950～2009 and the storm surge data during 1953～2009,the storm surge affected zone of Shantou were studied.In this paper,the frequency,cradle,track and landfill of tropical cyclone were statistically analyzed,and the paper also mainly analyzed the effects of time and spatial distribution characteristics of tropical cyclone on the storm surge which affected Shantou.The results showed that the best time of preventing storm surge disasters was from July to sepcember,especially in July.With changes in track and landfill of tropical cyclone,the intensity of storm surge was different.When the track of tropical cyclone was West-Northward,storm surge was the most frequent and strength was the largest;when tropical cyclone landing from west or front,the strength of storm surge was larger than other types of landing.The study result has guiding significance for storm surge forecast and could provide better service for avoiding and reducing the lost of marine disaster.