博兴县近50年日照时数气候变化特征分析

Analysis of Climate Change Characteristics of Sunshine Hours in Boxing County in Recent 50 Years

利用山东省博兴县1961~2010年的日照时数资料,分析了近50年博兴县日照时数年代际、年际、季节、月的变化规律。结果表明,近50年博兴县年日照时数、各季日照时数总体上均呈减少趋势,年变化倾向率为-6.944 h/a;在各季节的变化中夏季日照时数减少最多,冬季减少最缓;各月中仅有4月日照时数变化不是呈减少趋势,除此之外均呈减少趋势。日照时数急剧减少出现在2006年以后。

Using sunshine hours data in Boxing County Shandnng Province during 1961-2010, the annual, seasonal and monthly variation law of sunshine hours in recent 50 years were analyzed. The results showed that： annual sunshine hours, seasonal sunshine hours and total in Boxing County in recent 50 years decreased, the annual change tendency rate is -6.944 h/a; During the change of the seasons, the number of sunshine hours decreased during the summer, and the winter reduced slowly. Only in the month of April the number of sunshine hours is not a decrease trend. A sharp decrease in the number of hours of sunshine appeared in 2006.