Relationship between the Asian-Pacific oscillation and the tropical cyclone frequency in the western North Pacific

被引:54
作者
Zhou BoTao [1 ]
Cui Xuan [2 ]
Zhao Ping [3 ]
机构
[1] China Meteorol Adm, Natl Climate Ctr, Lab Climate Studies, Beijing 100081, Peoples R China
[2] China Meteorol Adm, Natl Meteorol Ctr, Beijing 100081, Peoples R China
[3] China Meteorol Adm, Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
来源
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2008年 / 51卷 / 03期
基金
中国国家自然科学基金;
关键词
Asian-Pacific oscillation; western North Pacific; tropical cyclone; atmospheric circulation;
D O I
10.1007/s11430-008-0014-7
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The relationship between the Asian-Pacific oscillation (APO) and the tropical cyclone frequency over the western North Pacific (WNP) in summer is preliminarily investigated through an analysis of observed data. The result has shown clearly that APO is significantly and positively correlated to the tropical cyclone frequency in the WNP. If APO is above (below) the normal in summer, more (less) tropical cyclones will tend to appear in the WNP. The present study also addresses the large-scale atmospheric general circulation changes underlying the linkage between APO and the WNP tropical cyclone frequency. It follows that a positive phase of summer APO is concurrent with weakened as well as northward and eastward located western Pacific subtropical high (WPSH), low-level convergence and high-level divergence, and reduced vertical zonal wind shear in the WNP, providing favorable environment for the tropical cyclone genesis, and thus more tropical cyclones will come into being, and vice versa.
引用
收藏
页码:380 / 385
页数:6
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