河北地区秋季大气气溶胶物理特征分析

利用2005年10月20日在河北省石家庄和邯郸地区进行的一次飞机探测资料,初步分析了石家庄和邯郸上空的气溶胶粒子数浓度、粒径、粒子谱垂直分布特征,对石家庄与邯郸之间的水平飞行气溶胶粒子数浓度资料进行分析,并对石家庄、邯郸的气溶胶粒子谱进行函数拟合。结果表明:各高度层气溶胶粒子数浓度基本上都是石家庄高于邯郸,各高度层粒子平均直径基本上都是石家庄低于邯郸。两地气溶胶粒子数浓度、粒子平均直径随高度的分布有不同特点。石家庄、邯郸气溶胶粒子谱谱型,低层相似,基本都是单调下降,高层粒子谱谱型为多峰型。3100m高度层粒子数浓度在水平方向上分布不均匀,城市附近上空气溶胶粒子数浓度相对较大,郊县气溶胶粒子数浓度相对较小。随着高度增加,粒子数浓度减小,水平方向的绝对变化越来越小。利用幂函数N(D)=AD-B可以对不同高度气溶胶粒子谱进行较好的拟合。

Analysis on Physics Character of Aerosol in Autumn Over Hebei Area, China

Using the aircraft probed data of October 20,2005 in Shijiazhuang and Handan in Hebei Area,the aerosol particle number concentration,particle diameter distribution,particle spectrum variety characteristic with height and different level were analyzed,the aerosol particle distribution was analyzed over Shijiazhuang and Handan Area.The results showed that the aerosol particle concentration in different level over Shijiazhuang region more than that in Handan,the average diameter of aerosol particles was difference with height over the two cities,the fitting spectrum curves of aerosol particles were similar in lower level above the two regions,it was single drop-down.The spectrums curves of aerosol particles was multi-peak mode at upper height level over the two areas,the aerosol particle concentration distribution was asymmetrical at the level of 3 100 m over the two cities,the particle concentration over each city was more than theirs suburbia,the aerosol particle concentration tended to d ecrease with the increase of height.The exponential expression N(D)=AD-B was used to fit the spectrums of aerosol particles of different height in the two regions。