城市灰霾与空气细颗粒物质量浓度水平的关系

为说明灰霾天空气中PM2.5的质量浓度与能见度的相互关系,对2007—2009年环境空气自动站连续自动监测数据进行分析。结果表明,PM2.5质量浓度上升时,大气能见度下降。空气因PM2.5的污染造成的大气能见度在3～10km,PM2.5质量浓度≤0.010mg/m3能使大气能见度〉10km。应采取相应措施对空气污染加以控制,提高大气能见度。

Relation between Visibility and Fine Particulate Matter Concentration Level

Monitoring data were analyzed from air environmental automatic monitoring station from the year 2007 to the year 2009 to make clear the relationship between the visibility and PM2.5 concentration in haze days. Results showed that visibility reduces when the level of PM2.5concentration goes up. If the air is polluted, the visibility is 3 to 10 km, and if the level of PM2.5 concentration ≤0. 010 mg/m3 , the visibility may be 〉 10 km. We proposed to take correspond- ing measures to control air pollution and improve visibility.