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中文摘要: 本文利用Palmer提出的计算水分异常指数方法,计算了华北春季的Palmer指数值,作为反映该地春季干湿状况的综合指数。使用经验正交函数方法分析了该地春季干湿状况的时空分布特征,并对其稳定性作了讨论,认为前四项典型的空间分布特征及相应随时间的演变规律是相当稳定的。
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Abstract:Here the water abnormal index given by Palmer is used to calculate Palmer index in spring over North China, which is considered as a comprehensive index of the dry and humidity conditions in spring over the regions. The method of the empirical orthogonal function was used to analyse the character of temporal-spatial distributions of the dry and humidity condition in spring, and its stability was discussed, too. It is thought that the, spatial distribution characters of the first 4 items and their. temporal evolution laws are very steady.
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引用文本：
王春乙,安顺清,潘亚茹,刘文泽,1990.华北春季干湿状况的时空分布[J].气象,16(5):20-25.
,1990.The temporal-spatial distributions of the dry/wet conditons over North China[J].Meteor Mon,16(5):20-25.
王春乙,安顺清,潘亚茹,刘文泽,1990.华北春季干湿状况的时空分布[J].气象,16(5):20-25.
,1990.The temporal-spatial distributions of the dry/wet conditons over North China[J].Meteor Mon,16(5):20-25.