摘要
利用广西88个气象观测站1960～2000年冬季冻害站数资料,通过采用自然正交函数开展、线性倾向估计、Mann—Kendal、MHAT分析等方法,分析了广西冬季冻害的时空特征、变化趋势、突变、周期性。得出结论:广西冬季冻害主要有2种分布型态:(1)全区偏多(少)型;(2)桂东北及部分江、河流域偏多,其余偏少型。冻害站数呈减少趋势,在1985～1987年前后出现突变点,其变化周期不明显,但年际变化较大。
Winter freezing damage data of 88 meteorological stations in Guangxi from 1960 to 2000 are analysed by methods such as natural orthogonal function development, linearity trend estimation, MannKendal and MHAT to study the temporal and spatial features, trend of change, mutation and periodicity of winter freezing damage in Guangxi. The result shows that there are 2 kinds of winter freezing damage distribution in Guangxi: 1) excessive (or fewer) damages in the whole region, 2) excessive damages in northeast area of Guangxi and part of the drainage areas while fewer in other areas. The stations that have records of winter freezing damage are on the trend of decrease. A point of mutation occurs around the year of 1985-1987, and its changing cycle is not obvious, but the changes among the years are great.
出处
《热带地理》
2003年第2期123-125,133,共4页
Tropical Geography
基金
广西自然科学基金资助项目(桂科自0007023)
