Abstract:To know the aerosol optical characterization and scattering extinction contribution of chemistry composition, an online observation work of light scattering coefficient was made, PM2.5 sampling was also made on January, April, July and October which was taken as typical 4months of its seasons. The light scattering coefficient was higher in autumn and winter than in spring and summer. A relation analysis showed that the mass scattering coefficient of PM2.5 in winter was 5.18m2/g, which was the highest of the whole year. Transportation and dissolution were obvious when the wind speed was above 3m/s; RH played an important increase role on light scattering coefficient when it was high enough. OC and sulfate in PM2.5 might be the main composition that affected the light scattering coefficient by the multi linear regression analysis. Based on the method of IMPROVE to calculate the contribution of chemical composition, organics contributed 38.51% of the total scattering coefficient, which was of the highest.
古金霞, 董海燕, 白志鹏, 霍光耀, 刘爱霞, 吴丽萍, 解以扬. 天津市颗粒物散射消光特征及化学组分贡献研究[J]. 中国环境科学, 2012, 32(1): 17-22.
GU Jin-Xia, DONG Hai-Yan, BAI Zhi-Peng, HUO Guang-Yao, LIU Ai-Xia, WU Li-Ping, JIE Yi-Yang. Light scattering extinction characterization of particulates and chemical composition contribution in Tianjin. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(1): 17-22.