喀什市1952—2006年日照时数时间变化特征

The Change Characteristics of Sunshine Hours in 1952—2006 in Kashi City

利用喀什市1952—2006年日照时数实测资料,分析了喀什市日照时数年代际、年际和各季的气候变化特征,并根据喀什市的降水资料及总、低云量资料,对照时数减少的成因做了分析。结果表明:近55a来喀什市的年、季日照时数均呈减少趋势。各季减少的气候倾向率不同,减少幅度最多的是夏季,最少的是秋季。

By means of the observed data of sunshine duration in Kashi city in recent 55 years, this paper analyzed the interdecadal, inter-annual and seasonal climate change characteristics on sunshine hours, and according to the data of precipitation, total cloud amount and low cloud amount in Kashi City, discussed the climatic causes for the decreasing sunshine duration. The results showed the decadal, annual and seasonal sunshine durations in Kashi City to have been decreasing trend in the past 55 years, while the decrease of seasonally climatic tendencies to have been unlike, the most decreasing range to be in summer and the least to be in Autumn.