Climatic Characteristics of Tropical Cyclones in Zhejiang and Relationship with Environmental Factors
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Abstract:
With the 57year Tropical Cyclone (TC) data from 1950 to 2006, the climatic characteristics of TCs influencing Zhejiang are analyzed. The results indicate that since the 1990s, the TCs influencing or landing Zhejiang show a increasing trend, which is different from the decreasing trend of TCs influencing or landing on the whole China. In TCs both influencing and landing on Zhejiang there exist variation with the long periods being quasi15 years and quasi25 years, and the short periods being the quasi5 years and quasi8 years, respectively. The average source region is more northward and eastward for TCs influencing Zhejiang than those influencing China, which is more westward and northward than normal from the 1990s. In addition, the East Asian circulation factors during July and September are analyzed, and the results show that the structure of the circulation system in the years with more TCs influencing Zhejiang is much different from the years with less TCs influencing Zhejiang.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.