TROPICAL GEOGRAPHY ›› 1993, Vol. 13 ›› Issue (4): 305-313.

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THE CHARACTERISTICS AND TYPES OF RAINFALL DURING TYPHOON SEASON IN HAINAN PROVINCE

Guo Ying-qiong, Chen Chuang-mai, Zheng Fu-rong   

  1. Department of Atmospheric Sciences, Zhongshan University, Guangzhou, 510275
  • Received:1993-06-01 Online:1993-10-30 Published:1993-10-30

Abstract:

This paper has made the statistical analysis of the spatial and temporal distribution of rainfall during typhoon season (July—October) of 1959—1982 in Hainan Province by using the standardized principal component technique. The first, from the first-4 eigenvalues of principal components, four kinds of main spatial distribution types are determined. That's the flood (drought) in the whole Hainan, the flood (drought) in the south and drought (flood) in the north, the flood (drought) in the east and drought (flood) in the west, the flood (drought) in the east and west coasts while the drought (flood) in the mid-part. The second, from the maximum absolute values of principal components the type of spatial distribution of rainfall for each year are determined. The third, from the maximum absolute values of each principal component in both positive and negative, the typical year of various distribution types is decided. The last, the frequency of appearence of each type is calculated. The results show that the theory are in agreement with practice very well. For example, the statistical analysis shows that the first eigenvalue is 67.3 percent of the total, and the actual appear once frequency of the first-type is 66. 7 percent. The results of this paper can provide scientific basis for long-range rainfall forecast.

Key words: Rainfall duriing typhoon season, Rainfall type, Hainan Province