广东冬季水资源的时空分布特征分析

取广东分布较为均匀的48个气象观测站50年的月平均气温和降水量资料,用高桥浩一郎公式计算广东冬季水资源量,用主分量分析计算其主分量及相应的特征向量。通过主分量和特征向量的配合将水资源场进行分型,较清楚地显示冬季水资源的气候背景。利用趋势分析、累积距平分析和小波分析等方法,较详细分析该水资源场的前4个主分量的时间变化特征。结果表明,广东冬季水资源场的前4个主分量不存在1到3阶变化趋势;用小波分析发现其存在明显的多时间尺度特征。

Analysis of Spatial-temporal Distribution Characteristics of Water Resources in Winter in Guangdong

Based on Guangdong 48 stations monthly temperature and rainfall data of 50 years,the physical evaporation of Guangdong in winter was calculated by Gaoqiao equation.And their eigenvectors and principal component were computed by empirical orthogonal function.Combining with the principal component and eigenvector,the pattern of water resources in winter was classified.It represented obviously the background of climate of winter water resources.The properties of temporal variation of the first 4-principal components were analyzed by using the methods of the tendency analysis and accumulative anomaly and wavelet analysis.The results showed that the first 4-principal components of winter water resources of Guangdong had no the one to three times variable tendency.It was found out that they had the characters of multiple time scale by wavelet method.