山西省日照时数的时空变化特征  

Sunshine Hours in Shanxi: Spatio-temporal Variation Characteristics

作　　者：赵永强[1] 王志伟[1] 李海涛[1] 

机构地区：[1]山西省气候中心,太原030002

出　　处：《中国农学通报》2017年第15期124-128,共5页Chinese Agricultural Science Bulletin

基　　金：公益性行业(气象)科研专项"干旱对华北玉米生长发育和产量影响的定量评估技术研究"(GYHY201306038);山西省气象局项目"基于DEM的山西省近50年日照时空变化特征分析"(SXKYBQH20138714)

摘　　要：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64.16 h/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。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.

关 键 词：日照时数 时空变化特征 山西 

分 类 号：P422.1[天文地球—大气科学及气象学]