摘要
对我国近３５年来到达地面的太阳辐射量观测资料进行方差分析和统计检验，结果表明：从７０年代开始，我国太阳直接辐射和总辐射量普遍减少，变化趋势分别为－２４６ＭＪ／ｍ２·１０ａ和－１６．８ＭＪ／ｍ２·１０ａ，减少量最大中心在长江流域。太阳散射辐射量在东北、华北以及南方地区增加，在长江流域和西北地区减少。此外，用太阳辐射量倾向率的形式归纳出我国四种典型的区域性太阳辐射量季节变化特征。
The variation of solar radiation in China during the recent 35 years(1957 1992) is analyzed with variance technique and significance test(Fα=0. 05).The results show that,direct solar radiation has obviously decreased in the whole county since the 1970's,with the maximum value of decreasing occured in the Yangtze valley. The trend of diffuse solar radiation showed regional features:increased in the Northeast,North China and the south of China,decreased in the Yangtze valley and the Northwest.The annual amounts of direct and global solar radiation of the whole country are decreasing at a rate of 246MJ/m2· 10a and 16.8MJ/m2· 10a respectively.In addition,among the available regions,the typical distribution characteristics of seasonal variation of solar radiation are classified into four types.
出处
《地理研究》
CSSCI
CSCD
北大核心
1996年第2期21-27,共7页
Geographical Research
基金
国家自然科学青年基金
关键词
方差
太阳辐射量
区域性变化
Variance technique,Solar radiation,Regional variation
