Analysis on the Variation of Rainfall Data from Guilin Weather Station during 1957-2007
[Objective] The research aimed to study the variation of rainfall data from Guilin Weather Station during 1957 -2007. [ Method] Based on the daily rainfall data in Guilin during 1957 - 2007, the trend, period and abrupt variation of precipitation in Guilin in 51 years were analyzed by using the trend analysis, wavelet analysis and Mann-Kendall non-parameter statistics test method. [ Result] The rainfall in Guilin in 51 years presented the rising trend. The rainfall variation was same in the first, second and third quarters in most of years, except in the in dividual year. The rainfall in the forth quarter had the decreasing trend, and the variation was obvious in each year. It illustrated that the rain fall variation in winter was very unstable and had the decreasing trend. But as a whole, the variation of total rainfall in Guilin wasn' t obvious and had the rising trend. It illustrated that the climate variation in Guilin in 51 years wasn't obvious. The wavelet analysis showed that the rainfall variation in Guilin had 15-year big period and the small period of 2 -3 years. Mann-Kendall non-parameter statistics test showed that the abrupt variation situation of total rainfall in Guilin in 51 years wasn't obvious. But the abrupt variation situations in the second and third quarters were more. The variation in recent 10 years was the most obvious. Maybe it was because of global climate variation. [Conclusion] The research provided the theory basis for analyzing the climate variation in Guilin.
国家科技期刊平台
NSTL
万方数据
维普
