广东年降水的类型特征和旱涝趋势

The Characteristics of Patterns of Annual Rainfall and Trend of Drought and Flood in Guangdong

应用主分量方法对广东年降水量进行统计分析，结果表明，它对年降水场的逼近收剑性比较快，前５项特征值占年降水总方差的７８．７％，即前５项特征向量已可反映年降水场最重要的特征．通过主分量和特征向量的配合，将逐年年降水场进行了分型，较清楚地显示出年降水量的气候背景．

To make the statistical analysis of annual rainfall in Guangdong, we use the method of principal component in this paper. The results show that, the convergency is very well in proximation of variance for the field of annual rainfall, the first five eigenvalues represent 78 7 percent in total variances, i.e. the first five eigenvectors represent the most important characteristics of annual rainfall. Combining the principal component and eigenvector, we classify the pattern of annual rainfall year by year. It represents obviously the background of climate of annual rainfall.