本溪县近52年日照变化特征分析

摘要

According to sunshine hours observation data during 1958 -2009, the annual average sunshine hours and variation characteristics in each season in Benxi County was analyzed. Linear regression and Mann-Kendall method were adopted to calculate linear equation of annual and each season average sunshine hours. The result showed that, sunshine in Benxi County in recent 52 years showed decrease trend, especially in spring; the annual average sunshine hours and spring, summer and winter changed significantly after 1970s, autumn changed after 1960s.%根据本溪县1958 ～ 2009年日照时数序列资料,分析了本溪县地区年平均日照时数和各个季节平均日照时数变化特征,并运用线性回归和Mann-Kendall法计算出年际和各个季节平均日照时数的线性方程与日照时数趋势变化和突变点.结果表明,近52年来本溪县日照以减弱为主,春季下降趋势最为显著；本溪县年和四季的平均日照时数全年、春、夏、冬季均在20世纪70年代发生了突变,而秋季在60年代中后期发生了突变.