中国气候资料站网均匀化订正的一种方案及应用

定义了中国160站站网不均匀性的两个度量参数—站域面积和站网密度。在给定球冠区面积S0=50×104km2下求得了它们的值,并论证了其合理性。用它们构造了第一类权重函数,将该权重函数应用于中国160站站网1、4、7、10月气温的全国气候平均值及均方差值的计算,得到了合理的结果。同时,构造了第二类权重函数,并应用于气温距平场时间序列的订正,对订正前、后的距平场序列进行EOF（empiricalorthogonalfunctions）分析,论证了订正后的结果优于订正前。

A scheme and its application of network homogeneity adjustment for climatic data of China

In this paper,two measuring parameters（e.g.station domain area and network density）of heterogeneity network from 160 stations in China are defined,which are calculated for presetting the spherical coronary area S0=50×104 km2,and their rationality is demonstrated.By use of them,the first weight function is constructed for calculating mean climate value and mean square deviation of air temperature of the network from 160 stations in China in January,April,July and October,in such a way that a reasonable result is obtained.Meanwhile,the second weight function is constructed,which is used to adjust anomalous air temperature of time series,and EOF（empirical orthogonal functions）analysis are carried on the original and the adjusted data.It demonstrates that EOF analysis result of the adjusted data is superior to that of the original data.