吉林省太阳辐射变化规律及太阳能资源利用研究

为揭示吉林省的太阳能资源变化规律，利用线性回归分析、线性相关分析及M-K检验法对吉林省长春、延吉两个气象站点1960年以来的太阳总辐射资料进行研究。结果表明：吉林省的年平均太阳总辐射为4787.4 MJ/㎡•a，夏季太阳总辐射最大，春季次之，冬季最小。吉林省年平均太阳总辐射在波动中下降，且下降趋势不显著，20世纪60年代太阳总辐射较高，80年代达到最低值，90年代以后小幅度回升。春、秋、冬三季的太阳总辐射呈不同程度的下降趋势，冬季的下降趋势显著，夏季呈显著增加。吉林省年日照时数在空间分布上呈现出由西向东逐渐减少的地域分布差异；而在时间上也呈现出由春季到冬季依次减少的分布特征。吉林省的太阳能资源总量丰富，变化趋势不显著，这对于吉林省利用太阳能资源是十分有利的。

Variation of solar radiation and utilization of solar energy resources in Jilin province

The solar radiation data from 1960 to 2005 in Changchun weather station and Yanji weather station in Jilin province were analyzed by linear regression analysis, linear correlation analysis and Mann-Kendall test in order to reveal the variation of solar energy resources. The results indicate that the mean annual solar radiation in Jilin province is 4787.4 MJ/㎡&;#8226;a. The solar radiation is strong in summer, followed in spring and winter. The mean annual solar radiation is fluctuant and has a decreasing trend, while the trend is not obvious. The solar radiation is higher in 1960s and is lower in 1980s, and returns to the normal in 1990s. The solar radiation decreases in spring, autumn and winter, especially in winter, while it increases in summer. The spatial distribution of annual sunshine duration decreases from the west to the east, and its temporal distribution decreases from spring to winter. In generally, total solar energy resources are rich and the change trend is not significant, which is benefit for the utilization of the solar energy resources in Jilin province.