广东5～9月降水的时空分布特征和类型

Features and Types of Spatial Temporal Distribution of the Rainfall from May to September in Guangdong

利用主分量分析方法对广东５～９月的降水量作了统计分析．结果将广东５～９月降水的空间分布分为全省性早（涝），西南涝（旱）东北旱（涝）等４种主要类型，前４种类型占该降水场总方差的６９％；广东５～９月旱涝在１９５４～１９６３年间出现频繁，旱涝共５次，而在１９６４～１９９０年间仅出现２次。

The spatial temporal distribution of the rainfall from May to September in Guangdong Province is analyzed by using the principal component technique. The results show that the spatial distribution of the rainfall could be classified into four main types, namely drought (flood) in the whole province, flood(drought) in the southwest and drought(flood)in the northeast, flood(drought) in the southeast and drought(flood) in the northwest, flood(drought) in the Pearl River Delta and drought(flood)in the east and Leizhou Peninsula. According to the maximal absolute values of the principal components, types of spatial distribution of the rainfall from May to September for each year are examinized. The results show that the flood drought type occurred frequently in 1954～1963, five times in ten years. Furthermore, it always covered the whole province area. The results of this paper provide climatic backgrounds for long term rainfall forecast.