中文摘要：

日照百分率时空格局是衡量区域太阳能资源分布及其变化的重要指标之一.基于河南省现有17个国家基准或基本气象站1961—2008年间的逐月日照百分率数据,运用SPSS 13.0,从时空格局和趋势分析两个方面对其进行对比研究.结果表明,河南省日照百分率呈明显下降趋势,2001—2008年均日照百分率比1961—1970年降低了9.72%;月份对比上,1月和12月的日照百分率递减趋势较为明显,且大部分台站达到了极显著水平（P〈0.01）,仅有4月的日照百分率变化呈现递增状态;季节对比上,日照百分率的下降主要表现在夏季和冬季,大部分站点都达到了极显著水平;地势较高的栾川、卢氏、西峡和孟津等西部4站点日照百分率下降趋势不显著.

英文摘要：

The research on spatial-temporal pattern of sunshine percentage is one of important indices,which can measure regional distribution of solar energy and its temporal changes.Based on the monthly sunshine percentages of seventeen national meteorological stations in Henan Province during fourteen years from 1961 to 2008,the spatial and temporal variations of sunshine percentages are studied.The result shows that the sunshine percentage of Henan Province has steadily decreased on average 9.72 percents from 51.90% of 1961—1970 to 42.18% of 2001—2008.In the monthly,it is only in both January and December that the sunshine percentage is decreasing so clearly that there are extreme significance in almost meteorological stations（P 0.01）,whereas not so much distinctness are found in the other months.But,there is only April whose trend of sunshine percentage change is increasing while the sunshine percentages tend to decrease in other months.In the seasonally,there is a decreasing trend in summer and winter from 1961 to 2008,and more importance is extremely significant in the most of meteorological stations.Most interestingly,there is no most obvious variation trend of sunshine percentage for the last fifty years only in higher elevation stations,including Luanchuan station,Lushi station,Xixia station and Mengjin station.