摘要
根据山西省62个地面气象站50a(1959-2008)的月日照时数系列数据,对全省日照时数的时空变化特征进行了较系统分析。结果表明,(1)近50a山西省年平均日照时数呈显著减少趋势(-65.40h·(10a)-1),且最近26a减少更为明显。(2)春夏秋冬4季日照时数均呈减少趋势,其中夏秋冬3季日照时数显著减少,尤以夏季和冬季减少最为突出(分别为-28.06h·(10a)-1和-23.45h·(10a)-1);(3)除4月日照时数略有增加之外,其余11个月的日照时数均呈减少趋势,其中7个月(即1月、6月、7月、8月、9月、10月和12月)日照时数呈显著减少趋势,且以6月减少最为突出(-14.40h·(10a)-1)。(4)在全省17个综合治理规划地区中,16个地区的日照时数呈显著减少趋势,主要以忻定盆地、太原盆地、临汾盆地和运城盆地(即第6、第7和第8地区)减少最为明显。
The temporal （annual, seasonal, monthly） and spatial variation pattems of sunshine duration over Shanxi （P. R. China） were analyzed on the basis of monthly sunshine duration series （1959-2008） from 62 surface meteorological stations throughout the province. The results indicated that （1） the annual sunshine duration series exhibited a significant decrease trend （-65.40 b·（10 a）^-1 over the province, being especially large since 1983. （2） The seasonal sunshine duration series demonstrated a negative trend in all four seasons, among which a significant negative trend was found in summer, autumn and winter, and the decline was highest in summer （-28.06 h·（10 a）^-1 and winter （-23.45 h·（10 a）^-1. （3） Except a insignificant increase trend in April, the monthly sunshine duration series showed a negative trend in all other months, among which a significant negative trend was found in January, June, July, August, September, October and December, with the maximum decrease being in June （-14.40 h·（10 a）^-1. （4） Out of 17 integrated management planning divisions throughout the province, the significant decrease in sunshine duration occurred in 16 divisions, with the maximum decrease occurring in 6th, 7th and 8th divisions.
出处
《生态环境学报》
CSCD
北大核心
2010年第3期605-609,共5页
Ecology and Environmental Sciences
基金
山西省黄土高原地区综合治理规划研究专项(20081143)
