用滤膜法观测大气冰核的静力扩散云室  

A STATIC DIFFUSION CHAMBER FOR DETECTING ATMOSPHERIC ICE NUCLEI BY USING FILTER TECHNIQUE

作　　者：杨绍忠[1] 马培民[1] 游来光[1] 

机构地区：[1]中国气象科学研究院

出　　处：《气象学报》1995年第1期91-100,共10页Acta Meteorologica Sinica

基　　金：国家气象局气象科学基金

摘　　要：介绍了经过改进的用滤膜法观测冰核的静力扩散云室及其取样装置。叙述了其各组成部分的原理、结构、达到的性能指标，分析了各系统的工作对冰核活化条件的影响。给出了对相对稳定的人工ＡｇＩ冰核源作不同体积的取样和不同温度下的处理结果，同时也给出了用该设备对北京市海淀区冬季冰核浓度的日变化所做的初步观测结果。An improved diffusion chamber using filter technique has been developed for detecting atmospheric ice nuclei. A movable partition board between the chamber top and bottom plate is designed in order to cut off the vapor source before and after the filter samples being produced. By using a relative stable AgI aerosol source, the examination tests of the chamber responding to ice nuclei concentration have been conducted with various sampling volume filters and under different temperatures. The ice nuclei concentrations have been measured using this equipment and the average daily variation in wintertime at northwestern suburb ofBeijing has been given. All these results show that the diffusion chamber will be useful for the study of cloud and precipitation physics.

关 键 词：冰核 静力扩散云室 滤膜法 大气 

分 类 号：P426.63[天文地球—大气科学及气象学]