我国散射辐射的气候计算方法及其分布特征

使用全国６４个日射站的散射辐射资料，首先计算与建立了各地１月、４月、７月和１０月的月散射辐射值与总云量、日照百分率之间的相关系数与经验关系式，并对经验关系式进行了方差检验。该经验关系式为：Ｄ＝Ｑ０（ｓ１＋０．０１）（ａ＋ｂＮ）。应用该经验关系式和２００多个地面气象站的资料，计算了各地的１月、４月、７月和１０月的散射辐射值。最后对我国四季散射辐射的分布及其年变化作简要的分析。

The Climatie Distribution of Diffuse Solar Radiation in China

Based on the diffuse solar radiation data of 64 solar radiation observatories from 1971 to 1985,the correlation coefficients between the total cloud cover, relative sunshine and the diffuse solar radiation are calculated. Then the experimental equation is established as the following:D=Q0(s1+0.01) (a+bN), where Q0 is the extraterrestrial radiation, s1 is the relative sunshine, N is the total cloud cover,a and b are experimental constants and Dn is the net diffuse solar radiation that is given by Dn=D/ (s1+0.01). The net diffuse solar radiation is the diffuse solar radiation of unit relative sunshine. With the experimental equation,diffuse solar radiations for more than 200 places where none of the solar radiation observation is calculated. Last,the distributions of monthly diffuse solar radiation in China is discussed.