Abstract：Aerosol measurements were conducted over Shijiazhuang area, Northern China, during the autumn of 2009, using the airborne Particle Measuring Systems (PCASP-100X, PMI Co. Ltd, USA) and forward scattering spectrum probe (FSSP-100-ER, PMI Co. Ltd, USA) of Weather Modification Office of Hebei Province. Measurements obtained in September and October in 2009 from seven flights in foggy days, one flight under rainy weather, and another flight under cloudy condition were chosen in this study to investigate the vertical and horizontal distributions of the concentration and mean diameter, as well as the size distribution of aerosol particles. Aerosol pollution over Shijiazhuang was quite heavy as compared to cleaner background regions, with the maximum particle concentration reaching 11910cm-3 near the ground. It was also shown that the concentration of aerosol particles was mainly affected by weather conditions, and inversion layer was the main factor that controls the vertical distribution of aerosol particles. High concentration of aerosol particles was measured below an inversion layer, but it decreased rapidly above the inversion layer. Foggy days were usually associated with inversion layer and larger humidity, and was favorable of aerosol accumulation, therefore, maximum concentration of 104cm-3 was measured under foggy weather, aerosol particles were accumulating with the days of non-precipitation before it reached the maximum and precipitation had a significant effect on aerosol removal. The results also indicated that the distributions of the concentration and size of aerosol particles were non-uniform in horizontal, and their absolute variations decreased with height and relative variations increase with height. Aerosol size distribution under the three weather conditions were similar with a single peak at about 0.11μm, but the peak values of the aerosol number concentration decreased under the condition of foggy, Ci dens, and light rain conditions. With the increase in altitude, the peak values of the particle size distribution was becoming smaller, and the spectrum was also getting narrower.
孙玉稳, 孙霞, 银燕, 韩洋, 董晓波, 姜岩, 赵志军. 华北地区气溶胶数浓度和尺度分布的航测研究
——以石家庄为例
[J]. 中国环境科学, 2012, 32(10): 1736-1743.
SUN Yu-Wen, SUN Xia, YIN Yan, HAN Yang, DONG Xiao-Bo, JIANG Yan, ZHAO Zhi-Jun. Aerosol distribution in North China Plain under different weather conditions. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(10): 1736-1743.
