基于山西省109个气象站点1961-2010年的日照时数资料,笔者采用气候倾向率分析、M-K突变检测和空间插值分析等方法,分析了山西省日照时数的时空变化特征.结果表明:近50年来,山西省平均日照时数在年代、年、季尺度上都呈减少趋势,年平均减少幅度为64.16h/10 a;四季日照时数中,夏季日照最多,冬季最少,各季变化中夏季减幅最大,春季最小;月变化为单峰型,最大值出现在5月;山西省日照时数年、季都存在由多到少的突变,年突变在1987年.山西省日照时数空间差异明显,表现为由南部到北部逐渐增加,南部地区少于北中部地区;大部分地区表现减少趋势,个别地区为增加趋势,其中年日照时数以潞城减幅最大,减幅为207.7 h/10 a.
Sunshine Hours in Shanxi: Spatio-temporal Variation Characteristics
Based on sunshine hours data of 109 meteorological stations from 1961 to 2010 in Shanxi,the authors used the methods of climate tendency rate analysis,M-K mutation detection and spatial interpolation,to analyze the spatio-temporal variation characteristics of sunshine hours in Shanxi.The results showed that:seasonal,annual,and decadal sunshine hours decreased with an average rate of 64.16 h/10 a;sunshine hours in summer was the most,that in winter was the least,sunshine hours decline in summer was the maximum,and that in spring was the minimum;monthly sunshine hours was unimodal,the maximum appeared in May;annual and seasonal sunshine hours had mutation in 1987 from more to less;the annual sunshine hours decreased from north to south,and the annual sunshine hours in north and middle was more than that in south;most of the region showed a decreasing trend,and some areas had an increasing trend,of which,the annual sunshine hours in Lucheng had the biggest decline with a rate of 207.7 h/10 a.
NETL
NSTL
万方数据
维普
