Quantitative Analysis of Aerosol Optical Properties in Summer in Beijing

摘要

Aethalometer and nephelometer were used to analyze black carbon concentrations (BC), aerosol absorption coefficient (Ab), scattering coefficient (Sc), single scattering albedo (SSA) in Beijing metropolitan areas in May 20 ~ August 30, 2009. The data downloaded from AERONET website were also employed to investigate aerosol optical depth (AOD). The results showed that the average and standard deviation of BC, Ab, Sc，SSA，AOD were 7.02±4.76 Mm-1, 54.87±39.17 Mm-1, 340.6±346.85 Mm-1, 0.8±0.1 和0.41±0.44 respectively. Ab, Sc, SSA all presented a obviously single peak diurnal variations, while the maximum value of these three parameters appeared at 05 am, 10am and 01 pm. Ab and Sc were well related with Fine Particulate Matter (PM2.5), for correlation coefficients is respectively 0.65 and 0.78. There was a serious fog and haze event on June 18,while the maximum value of Ab and Sc were 341.14 Mm-1and 3152.02 Mm-1 .Yellow Sea and the industrial cities on southeast of Beijing contributed the water vapor and particles for the formation of fog and haze weather.