用混合和扩散云室对大气冰核浓度的观测分析  

Observation of Ice Nuclei Concentration Using Mixing Cloud Chamber and Static Diffusion Chamber in Beijing

作　　者：杨绍忠[1] 王祥国 游来光[1] 皮家雄[1] 

机构地区：[1]中国气象科学研究院,北京100081 [2]中国气象学会秘书处

出　　处：《气象》2004年第12期39-43,共5页Meteorological Monthly

基　　金：国家自然科学基金 4 9375 2 2 9#项目的资助

摘　　要：继 1 96 3年用混合云室对春季冰核浓度观测之后 ,1 994～ 1 996年 ,在同季节、同地点用混合和静力扩散云室又做了同步观测。对取得的资料进行整理分析 ,得出了凝华核浓度在不同天气背景下占总冰核浓度的百分比 ,两种云室测值的对应关系 ;分析了扩散云室的容积效应及冰核浓度随气压、能见度等气象因子的变化。Ice nuclei concentration in the atmosphere is measured by both the Bigg mixing cloud chamber and the static diffusion chamber of processing Millipore filter samples at northwest suburb of Beijing from 18 March to 30 April 1995. The typical weather of clear sky, sandstorm, and heavy air pollution were encountered during these parallel observation. The data were obtained by mixing cloud chamber for -15℃,-20℃,-25℃ and -30℃. 464 membranes sampled processed in the static diffusion chamber at -20℃ and -25℃ respectively under ice super-saturation condition. The data obtained from both devices was compared daily and the correlation with wind direction, surface visibility and atmospheric pressure is also analyzed.

关 键 词：冰核 观测分析 大气 能见度 气压 凝华 扩散 浓度 春季 气象因子 

分 类 号：P532[天文地球—古生物学与地层学]