摘要
利用河北省2005年10月份的3次气溶胶飞机观测资料和宏观天气资料,综合分析石家庄地区不同天气条件下气溶胶的垂直分布和尺度谱分布特征。分析结果表明：气溶胶浓度的分布与大气环境情况密切相关。气溶胶数浓度最大值的变化范围是103~104cm^-3,平均数浓度为103cm^-3,粒子平均直径为0.120~0.150μm;21日近地面有霾,相对湿度为58%,近地面气溶胶浓度较17和29日略低,但粒子平均直径（0.165μm）比其余两次要大,可见相对湿度较大,大气中水汽含量较多,有利于小粒子凝结水汽,使粒子直径增大;逆温层结下,粒子在逆温层下累积,无逆温时数浓度最大值出现在近地面附近。气溶胶粒子谱呈单峰分布。
By using 3 aerosol airplane observations and macroscopic weather data in October 2005, vertical and size spectrum distribution characteristics of aerosol particle in different weather are analyzed. The results show that the distribution of aerosol density is closely related with atmospheric environment. The maximum number concentration of aerosol changed from 10^3-10^4 cm^-3, and the mean number concentration was 103 cm^-3. The mean diameter was 0.12-0.15 μm. There was haze near surface on 21 October, the relative humidity was 58% , and the concentration of surface was slightly lower than those on 17 and 29, but the average diameter was 0. 165 μm, slightly larger than the other two times. So, it was clear that when humidity is bigger, more vapor content in the atmosphere, it was conducive for small particles to increase. When inversion exists, the number of particles accumulated at the end of the inversion layer, and when there was no inversion layer, the max value occurred near the surface. Aerosol particle spectrum showed unimodal distribution.
出处
《气象与环境科学》
2015年第1期34-39,共6页
Meteorological and Environmental Sciences
基金
国家973全球变化重大科学研究多尺度气溶胶综合观测研究项目(2010CD950804)资助
关键词
大气气溶胶
垂直分布
谱分布
atmospheric aerosol
vertical distribution
spectrum distribution
