摘要
通过对长江三角洲地区(南京,杭州,上海,合肥)1961—2000年辐射资料的比较,根据中国气象局编写的《气象辐射观测方法》对该地区年地面太阳辐射平均值进行计算,分析长江三角洲地区地面太阳辐射的长期变化及季节差异,并讨论长江三角洲地区两个重要城市杭州和南京的部分与地面太阳辐射息息相关的因子,分析长江三角洲地区直接辐射,散射辐射与总辐射的关系。结果表明:在40 a中长江三角洲地区4个代表城市总辐射长期变化分为两个阶段,1980s为谷值,谷值前有明显的下降趋势,后期总辐射变化趋势发生逆转,就所研究城市而言,1960s到1980s地面太阳总辐射的下降主要是由于直接辐射下降引起的。
Based on daily date of solar radiation from 1961 to 2000 at Nanjing, Hangzhou, Shanghai and Hefei, Yangtze River Delta of China, in this paper the average annual solar radiation was calculated, long-term variation of solar radiation was analyzed, and different season variation and the transmission factors of solar radiation was discussed, as well as the relation of direct radiation, diffuse radiation and global radiation was analysed, and their annual or long-term variation was researched. The results show that long-term variation of solar radiation from 1960s to 1980s was characterized by a two-phase process, an obvious decline followed by a ＂valley＂. During the late 1980s the variation tendency was opposite. As far as the above-mentioned four cities were concerned, solar radiatron on the surface decreased mainly due to decline of direct radiation.
出处
《气象科学》
CSCD
北大核心
2009年第4期447-453,共7页
Journal of the Meteorological Sciences
基金
国家重点基础研究发展规划(973)项目(2006CB403705)
关键词
总辐射
直接辐射
散射辐射
日照时数
Global radiation Direct radiation Diffuse radiation Sunlight time
