近59年邯郸市日照时数变化特征分析

The Variation Characteristics of Sunshine Duration in Handan in Recent 59 Years

根据邯郸市气象观测站1955-2013年逐年、逐月的日照时数资料,采用线性倾向估计方法,分析了邯郸市日照时数的年、季变化趋势,并运用Mann-Kendall非参数检验方法对其进行了突变检验。结果表明,近59年邯郸市年日照时数总体呈减少趋势,其气候变化率为-103.68 h/10a;日照时数年际变化幅度较大,峰值点1965年与谷值点1996年相差可达1 096.6 h;日照时数存在明显的季节差异,夏季变化趋势最明显,其次是冬季、秋季,而春季变化趋势不显著;近59年来5月平均日照时数最多,12月最少,各月日照时数减少最明显的是7月,3、4月变化不显著;年日照时数在1982年发生了明显的突变,从气候多日照时段转为少日照时段,秋季突变时间点与年突变相同。

Based on the annual and monthly sunshine duration data of the meteorological stationin Handan during 1955 - 2013, using linear trend estimation method and Mann - Kendall mutation test method, the change trend of sunshine durationin Handan City were analyzed. The results showed that： In resent 59 years, the sunshine duration in Handan City decreased with a tendency of 103.68 h/10a; The interannual variation amplitude is obvious, and the difference in sunshine duration between 1965 and 1996 reaches up 1 096.6 h. There is obvious seasonal difference in sunshine duration. The most obvious change of season is summer, the second iswinter and autumn, the change trend in spring is not significant. In resent 59 years, the sunshine duration in May is the most, the sunshine duration in December is the least. The most obvious change of month is July, but the change trend in March and April is not significant. The annual sunshine duration in 1982 occurred abrupt change form long to short. The annual abrupt change time and the abrupt change time of autumn are the same.