平定日照时数异常减少的成因分析

Urbanization development rapidly led to decrease abnomaly of sunshine hours in Pingding of Shanxi province

针对山西省阳泉市平定近年日照时数异常减少的情况，利用阳泉市3个地面气象站资料，分析了探测环境、气候变化、气象要素、社会发展因素等可能影响平定日照观测的因素，研究了平定日照时数异常减少的原因。结果表明：在霾日数、总云量、降水量、相对湿度等有关的气象要素中，平定日照时数的变化与霾日数相关性最好；同样天气条件下，疆最少年（2005年）和最多年（2011年）大气透明度不同，日照时数、日照开始时间、日照结束时间均有显著差异。平定霾13数与主要城市发展因子显著正相关，日照时数与主要城市发展因子显著负相关；日照时数异常减少与固定资产投资的大幅增加相伴，与霾日数的突增相伴。因此，在目前经济发展水平条件下，平定城市化急剧发展导致霾日数大幅增加，大气透明度下降，是平定近年来日照时数异常减少的主要原因。

In the case of sunshine hours of Pingding of Shanxi Province decreased abnormaly in recent years, the data of 3 meteorological observation in Yangquan was used to analysis the possible factors including detection environment, climate variability, meteorological elements and social development factors which could affect sunshine observation. The reasons for decrease abnormaly of sunshine hours of Pingding was found out. The results showed that sunshine hours was correlated best with haze days among related meteorological elements such as haze days, total cloud cover, precipitation and relative humidity in Pingding. The transparency of the atmosphere, sunshine hours, sunshine start time, sunshine end time were significantly different in the least haze year （2005） and the most haze year （2011） at the same weather conditions. Haze days significantly positive correlated with major urban deve factors and sunshine hours significantly negative correlated with in Pingding. The sunshine hours of Pingding lop red uced abnormaly accompanied by a substantial increase of fixed asset investment and a sudden increase in haze days. The urbanization development rapidly leaded a increase of haze days by a big margin and a decline of transparency of the atmosphere and it was the main cause of sunshine hours decreased abnormaly in Pingding.