2013年1月北京市PM_(2.5)区域来源解析  

Regional Source Apportionment of PM_(2.5) in Beijing in January 2013

作　　者：李璇[1] 聂滕 齐珺[1] 周震[1] 孙雪松[1] 

机构地区：[1]北京市环境保护科学研究院,国家城市环境污染控制工程技术研究中心,北京100037

出　　处：《环境科学》2015年第4期1148-1153,共6页Environmental Science

基　　金：北京市环境保护科学研究院科技基金项目(2014A04)

摘　　要：2013年1月，北京地区经历了多次严重的灰霾天气，细颗粒物污染已成为北京地区所面临的重要问题．了解和掌握北京细颗粒物的污染来源，是解决细颗粒物污染的重要途径，也是制定防治政策的重要依据．通过建立三维空气质量模型系统，对2013年1月20～24日的污染过程进行模拟，并运用PSAT技术探究北京市细颗粒物污染的区域来源．结果表明，本地源排放是北京市PM2.5的主要来源，平均贡献率为34％；河北和天津的平均贡献率分别为26％和4％；京津冀周边地区及模拟边界外的贡献分别为12％和24％．在重污染日，区域传输对北京市PM2.5的影响显著增强，是北京PM2.5污染的主要来源．PM2.5中的硝酸盐主要来自北京市周边地区的贡献，而硫酸盐和二次有机气溶胶呈现远距离传输的特性，铵盐和其他组分则主要来自北京本地的贡献．In January 2013, Beijing area experienced several severe haze weather events. The pollution of line partieles has become an important problem in Beijing. Understanding the sources of PM2.5 in Beijing is essential for solutions and related pollcy-formulations. Three-dimensional air quality modelling system was established to analyze the PM2.5 pollution during 20-24 January in 2013. PSAT technology was used to study the regional sources of Beijing PM2.5 pollution. The results showed that local emission was the major source of PM25 in Beijing City, with an average contribution rate of 34%. The average contribution rates of Hebei and Tianjin were 26% and 4% , respectively. The neighboring area and the boundary conditions contributed 12% and 24% to PM2.5 in Beijing. In the heavy pollution period, the influence of regional transportation increased significantly, and became the major source of PM2. 5 pollution in Beijing. Nitrate in PM2.5 in Beijing mainly came from the surrounding area of Beijing City, while sulfate and secondary organic aerosols showed characteristics of long-distance transportation. Ammonium salt and other components were mainly from Belling local contribution.

关 键 词：PM2.5 来源解析 北京 CAMX 

分 类 号：X513[环境科学与工程—环境工程]