气溶胶细粒子与能见度的相关性研究

为了分析气溶胶粒子特别是细粒子（PM2.5）对能见度的影响，本文从理论上建立了气溶胶细粒子与能见度的关系，分析了谱分布、PM2.5/PM10和细粒子消光所占总消光比重的关系。利用2004年8月在北京的测量数据与理论计算对比表明：建立的气溶胶细粒子与能见度的关系是合理的。这对治理污染提高城市能见度是很有指导意义的。

Study the Relationship between Fine Particle and Visibility

The effect of aerosol fine particle(PM2.5) on the visibility was discussed,and the relationship between PM2.5 and visibility was established theoretically.The relative PM2.5/PM10 and extinction coefficient were analyzed with changing of particle distributions based on Mie scattering theory.By comparison of measured data and calculated values,experimental results indicate that the pollution of PM2.5 is the main factor that results in visibility dropping,and the error of calculated value is less than 30%,which is significant for dealing with pollution of PM2.5 and improving atmospheric visibility.