摘要
Climatic characteristics of China-influencing typhoons (CIT) were analyzed in this paper. Main characteristics include:(1) CIT season is May-November, especially from July to September. (2) Frequency of the CIT shows a decreasing trend during 1951-2004, especially after the late period of the 1960s. (3) Strong CIT also shows an obvious decreasing trend. Meanwhile, there exist obvious interdecadal variations in the CIT genesis, being more southward and eastward than normal in 1960s-1970s, and more northward and westward than normal in the 1980s. In addition, the interrelations between CIT and its environmental factors show that CIT has close relationships with sea surface temperature and East Asian summer monsoon;the structure of the circulations in frequent CIT years is much different from that in infrequent CIT years.
Climatic characteristics of China-influencing typhoons （CIT） were analyzed in this paper. Main characteristics include： （1） CIT season is May-November, especially from July to September. （2） Frequency of the CIT shows a decreasing trend during 1951 - 2004, especially after the late period of the 1960s. （3） Strong CIT also shows an obvious decreasing trend. Meanwhile, there exist obvious interdecadal variations in the CIT genesis, being more southward and eastward than normal in 1960s 1970s, and more northward and westward than normal in the 1980s. In addition, the interrelations between CIT and its environmental factors show that CIT has close relationships with sea surface temperature and East Asian summer monsoon; the structure of the circulations in frequent CIT years is much different from that in infrequent CIT years.
基金
Natural Science Foundation of China (40375025
40775046)
Project 973 (2006CB403601)
Typhoon Research Foundation of Shanghai
关键词
中国
台风
气候特征
环境因素
China-influencing typhoons
climatic characteristics
interdecadal variations
environmental factors
