云滴数浓度对大气颗粒污染物浓度的气象数值模拟研究  

Meteorological Numerical Simulation Study on Influence of Cloud Droplet Number Concentration on Concentration of Atmospheric Particle Pollutants

作　　者：闫永刚 Yan Yonggang(Shanxi Meteorological Observatory,Taiyuan 030002,China)

机构地区：[1]山西省气象台,山西太原030002

出　　处：《环境科学与管理》2024年第6期110-114,共5页Environmental Science and Management

基　　金：山西省气象局科研项目:山西小河流山洪灾害临界雨量计算方法研究,项目编号:SXJZCGYY202203。

摘　　要：通过气象数值模拟过程,分析云滴数浓度对大气颗粒污染物浓度的影响。利用高斯扩散模型分析云滴数浓度对大气颗粒物浓度值的影响,再根据大气颗粒污染物粒径建立污染物浓度值方程。实验中,使用石英滤膜采集大气污染物样本后,利用HNO_(3)、H_(2)O_(2)和HF分解污染物质。模拟在云滴数浓度为20%、40%、60%、80%时,不同污染物粒径范围内的污染物浓度随时间的增长情况。结果表明:大气中的颗粒物在吸收云滴水分后,会出现增大或凝并现象。随着云滴数浓度增高,污染物浓度值呈现衰减趋势。当云滴数浓度较小时,重金属颗粒污染物浓度相对更高。This study analyzes the impact of cloud droplet number concentration on the concentration of atmospheric particulate pollutants through meteorological numerical simulation process.It uses Gaussian diffusion model to analyze the effect of cloud droplet number concentration on atmospheric particulate matter concentration,and then establishes pollutant concentration equation based on the particle size of atmospheric particulate pollutants.After collecting air pollutant samples using quartz filter membranes,the pollutants were decomposed using HNO_(3),H_(2)O_(2),and HF.The study simulates the growth of pollutant concentration over time within different particle size ranges when the cloud droplet number concentration is 20%,40%,60%,and 80%.The results indicate that particulate matter in the atmosphere will increase or coalesce after absorbing water from cloud droplets.As the concentration of cloud droplets increases,the concentration of pollutants shows a decreasing trend.When the concentration of cloud droplets is low,the concentration of heavy metal particle pollutants is relatively higher.

关 键 词：云滴数浓度 气象污染 颗粒污染物 高斯扩散 石英滤膜 

分 类 号：X513[环境科学与工程—环境工程]