大同市能见度变化特征与空气污染的关系

The Relationship between Visibility Variation and Air Pollution in Datong City

采用线性倾向和5a滑动平均分析法对2000～2011年的能见度观测资料进行了统计分析,研究大同市大气能见度特征。结果表明:大同市的大气能见度有明显的年际变化、月季变化和日变化特征,除2003～2006年呈下降趋势外,2008年后基本呈线性上升趋势。在污染物因子中,PM10是影响能见度的主要原因,能见度与其质量浓度呈显著的负相关。

To study the characteristics of atmospheric visibility in Datong,the collected data between 2000and 2011 were statistical analyzed using linear tendency and 5A moving average analysis methods.The results showed that the atmospheric visibility was various based on the yearly,monthly and daily change but mainly showed the increased trend except from 2003to 2006period.The pollutant of PM10was the main factor which influenced the visibility,and a significant negative correlation was observed between the concentration of PM10and the visibility.