基于飞机观测的四川盆地9月气溶胶粒子谱分析  

Aerosol Particle Spectra Analysis over Sichuan Basin in September based on Airborne Observation

作　　者：王维佳[1,2] 李宏宇 WANG Weijia;LI Hongyu(Weather Modification Office of Sichuan Province,Chengdu 610072,China;Key Laboratory for Cloud Physics of China Meteorological Administration,Beijing 100081,China;Weather Modification Center,CMA,Beijing 100081,China)

机构地区：[1]四川省人工影响天气办公室,四川成都610072 [2]中国气象局云雾物理环境重点开放实验室,北京100081 [3]中国气象局人工影响天气中心,北京100081

出　　处：《成都信息工程大学学报》2022年第3期333-343,共11页Journal of Chengdu University of Information Technology

基　　金：四川省科技计划资助项目(2019YJ0621);中国气象局云雾物理环境重点实验室开放课题资助项目(2017Z01610)。

摘　　要：基于飞机搭载的PMS(particle measuring system)系列机载粒子探头飞行观测数据的分析,获得了四川盆地尺度0.1~3.0μm的气溶胶粒子数浓度的垂直分布及不同高度层的气溶胶粒子谱分布,并对粒子谱进行拟合分析。结果表明:四川盆地2010年9月4次飞行观测到的气溶胶粒子平均数浓度分别为210 cm^(-3)、254 cm^(-3)、163 cm^(-3)、260 cm^(-3),与北京、石家庄飞机观测到的气溶胶数浓度量级相同。各高度上的气溶胶粒子平均直径均在0.13~0.22μm,说明四川盆地9月气溶胶粒子大多为细粒子,呈现显著的城市工业气溶胶特征。气溶胶粒子谱呈单峰、双峰或三峰分布。总体上,随着海拔高度的增加,气溶胶浓度减小,粒子谱变窄,但高空有云出现时气溶胶浓度会有小幅度增大。四川盆地9月的气溶胶粒子谱满足Junge谱分布,利用三参数尺度谱拟合更接近飞机观测事实,但采用三参数对数正态分布谱拟合效果不好。By using in-situ airborne observation data from PMS(Particle Measuring System) probes,the vertical distribution and the size spectrum distribution at different heights of aerosol particles between 0.1 microns and 3.0 microns over Sichuan Basin in September are analyzed,and the fitting analyzing of the aerosof particle spectra are implemented as well.The results show that,in September,2010,the mean number concentration of aerosof particles observed during the four flights over Sichuan Basin are 210 cm^(-3),254 cm^(-3),163 cm^(-3),260 cm^(-3) respectively,with a magnitude which is the same as that of the aerosols from in-situ airborne observation over Beijing and Shijiazhuang.The mean diameters of aerosol particles at different heights range between 0.13 microns and 0.22 microns,and the majority of the aerosol particles over Sichuan Basin in September are fine particles,demonstrating obvious urban-industry aerosol characteristics.The size spectra of aerosol particles show one peak,two peaks or three peaks.As a whole,the concentration and the spectral width of aerosol particles decrease with altitude.However,when clouds cover at high altitudes,the concentration of aerosols at those altitudes will increase a bit.The aerosol particle spectrum in Sichuan Basin in September satisfies the Junge spectrum distribution,and the fitting of the three-parameter scale spectrum is closer to the facts of airborne observations.But the fitting effect of the three-parameter lognormal distribution spectrum is not good.

关 键 词：气溶胶 粒子谱 飞机观测 四川盆地 

分 类 号：P412.24[天文地球—大气科学及气象学]