北疆地区太阳总辐射的时空变化

根据1961—2006年北疆4站太阳总辐射气候资料，用气候趋势系数及回归系数研究了太阳总辐射的变化趋势及其时空分布状况，并对影响太阳总辐射的气候因子进行了分析。结果表明，46年间北疆地区的月、季、年太阳总辐射总体均呈现下降趋势，其中太阳年总辐射呈显著下降趋势；太阳总辐射与总、低云量、相对湿度、雨雪日数具有较好的负相关性；造成北疆地区太阳总辐射呈下降趋势的重要气候原因是：平均总、低云量、相对湿度、雨雪日数增加的综合作用。

Spatial-temporal Change of the Solar Total Radiation in the Northern Region of Xinjiang

Based on the monthly total solar radiation data during 1961 -2006 from four meteorological stations over the northern region of Xinjiang,the long-term variation trend about total solar radiation were studied by methods of climatic tendency coefficient and regression coefficient, and the impact of climate factors were analyzed. The results show that ： 1 ） The total solar radiation have been decreasing tendencies in the recent 46 years in the northern region of Xinjiang;2）Solar total radiation has good negative correlation with total cloud cover,low cloud cover, relative humidity, rain and snow days ;3 ）The important factors that the total solar radiation has on the decline have combined effects of the average total cloud cover, low cloud cover, relative humidity, the numbers of rain and snow days.