A study of aerosol changing rule in Beijing during a decade

摘要

Basing on the Aerosol Product data from the AERONET website, We analyzed the 550nm aerosol optical depth(AOD), Angstrom exponent(AE), aerosol volume concentration and aerosol size distribution from 2003 to 2013, excluding the year 2008 due to lacking of data. The research shows: high AOD often occurred in spring and summer. The coarse particle such as dust particle dominates in the spring and the fine particle dominates in the summer. On the interannual variation, there is an obvious trend: From 2003 to 2007, the AOD was often above 1.5 due to the dust pollution from north areas in spring and took the second place in summer. Before and after the Beijing Olympic Games, the atmospheric condition improved. Nevertheless, the AOD rised again till 2012 and 2013. In addition, fine mode aerosol optical depth is closed concerned with PM2.5 and the fine particle volume concentration affects the AOD more. In a word, the study of aerosol changing rule in Beijing from 2003 to 2013 can reflect some environment issues and contribute to atmospheric improvement as a related reference.