近58年西北太平洋热带气旋频数和强度的变化特征研究

文章利用1950-2007年西北太平洋热带气旋（TC）资料,对热带气旋发生频数、强度、登陆频数和地点在季节、年际、年代际时间尺度上的变化规律进行了分析。分析结果表明：近58年西北太平洋热带气旋的发生频数总趋势是下降的,且强度在年代际变化上呈现出逐渐减弱的趋势。登陆热带气旋的年际和年代际变化与西北太平洋生成频数密切相关,对我国的影响主要为华南沿海、台湾及浙江以南的华东沿海地区。

Climate Features of Tropical Cyclones in the Northwest Pacific in terms of Frequency and Intensity during the Past 58 Years

Based on the tropical cyclone yearbooks of the western North Pacific from the year 1950 to 2007,the climate features of tropical cyclone in western Pacific are analyzed.The results show that the mean frequency and the mean intensity of the tropical cyclone in western North Pacific are decreasing.The influenced areas of the landfall tropical cyclone are North China,Taiwan and East China to the south of Zhejiang Province.