Abstract:The variations of the aerosol absorption coefficient in the urban area of Hangzhou city for the period from April to June, 2011 and from December, 2011 to February 2012, were studied using black carbon and conventional meteorological date at national basic meteorological stations. The results showed that the absorption coefficient in winter [(42.3±17.7)Mm-1] was higher than that in summer [(35.8±10.5)Mm-1] and the aerosol absorption coefficient changed violently in winter. The diurnal variation of the aerosol absorption coefficient presented a double-peak on effects of boundary layer evolution and human activities, the peak value appeared at 07:00~09:00, the valley value appeared at 14:00, the second peak value appeared at 19:00~20:00. The most representative aerosol absorption coefficient was 24.7Mm-1, which was calculated by fitting hourly frequency distribution. Aerosol absorption coefficient in haze was higher than that in no-haze. The increase in haze pollution led to step up trend of aerosol absorption coefficient, which may be one of the important reasons for visibility degradation.
杜荣光, 齐冰, 周斌, 于之锋. 杭州市区大气气溶胶吸收系数观测研究[J]. 中国环境科学, 2013, 33(5): 769-774.
DU Rong-Guang, QI Bing, ZHOU Bin, YU Zhi-Feng. An observational study on aerosol absorption coefficient in urban site of Hangzhou. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(5): 769-774.