Abstract：Based on the sounding data, NECP reanalysis data and AERONET aerosol retrieval data, the causes of one typical haze event in Beijing as well as the variation of aerosol optical properties parameters during this episode were analyzed. The analysis showed stable circulation pattern and high humidity environment together with inversion structure were responsible for the persistence and development of haze during this period. Due to the accumulation of local aerosols with the growing relative humidity, AOD and the concentration of PM2.5 were gradually on the increase, instead, visibility took on an opposite trend. Besides, particle extinction was enhanced at the same time. Aerosol volume spectrum exhibited bimodal structure, the peak concentration of fine aerosol particles increased day by day and was much greater than the coarse’s, the Angstrom exponent index varied from 1.2 to 1.4. These two parameters could indicate that the dominating particles were mainly contributed by fine aerosols during this episode. The increasing higher SSA suggested the enhancement of scattering ability. SSA changed with wavelength presenting two major trends, which was associated with the size of the dominating particles of the day. In addition, radiation flux reaching ground declined because of the existence of aerosols. These aerosol optical properties parameters provided references to explore the aerosol characteristics and climate effect during haze event in Beijing.
刘唯佳, 韩永翔, 王静, 赵天良. 北京2010年10月一次典型灰霾过程光学特性分析[J]. 中国环境科学, 2015, 35(7): 1931-1937.
LIU Wei-Jia, HAN Yong-Xiang, WANG Jing, ZHAO Tian-Liang. Aerosol optical properties during one typical haze event over October 2010 in Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(7): 1931-1937.
