苏州市大气污染区域传输特征分析  

Analysis of transmission characteristics of air pollution in Suzhou

作　　者：李春燕 王恪非 姚宇坤[1] 赵秋月[1] 刘倩[1] Li Chunyan;Wang Kefei;Yao Yukun;Zhao Qiuyue;Liu Qian(Jiangsu Provincial Academy of Environmental Science,Jiangsu Provincial Key Laboratoryof Environmental Engineering,Nanjing 210036)

机构地区：[1]江苏省环境科学研究院江苏省环境工程重点实验室,南京210036

出　　处：《环保科技》2021年第2期8-11,共4页Environmental Protection and Technology

基　　金：国家重点研发计划项目《典型省份大气污染防治费用效益综合评估与应用示范》(2016YFC0207607);江苏省环保科研课题《臭氧前体物排放特征与控制对策研究》(2017003)。

摘　　要：为探究长三角典型城市大气细颗粒物污染的区域传输特征,应用气象模式WRF耦合空气质量模式CAMx对苏州市2018年1月、7月PM_(2.5)区域传输污染贡献情况进行分析。结果表明,2018年PM_(2.5)模拟值与监测值变化趋势基本一致,模拟效果较好。尽管本地排放影响占PM_(2.5)浓度大部分,但仍具有较为明显的区域污染传输特征,2018年1月和7月,本地贡献率分别为57.3%和62.6%,外来源贡献率为42.7%和37.4%。尤其在重污染过程中,由边界层而来的长途传输占比迅速增加,表明冬季气团的污染物长途输送对苏州重污染过程PM_(2.5)浓度有十分重要的贡献。In order to explore the regional transmission characteristics of atmospheric fine particle pollution in typical cities in the Yangtze River Delta,the weather mode WRF coupled with air quality model CAMx was used to analyze the contribution of Suzhou PM_(2.5) regional transmission pollution in January and July 2018.The results show that the change trend of PM_(2.5) simulation value and monitoring value in 2018 is basically the same,and the simulation effect is good.Although local emissions account for most of the PM_(2.5) concentration,obvious regional pollution transmission characteristics was still observed:in January and July 2018,the local contribution rate was 57.3%and 62.6%,and the external source contribution rate was 42.7%and 37.4%.Especially in the process of heavy pollution,the proportion of long-distance transmission from the boundary layer has increased rapidly,indicating that the long-distance transportation of pollutants in winter air masses has a very important contribution to the PM_(2.5) concentration of Suzhou's heavy pollution process.

关 键 词：区域传输 PM_(2.5) WRF-CAMx 

分 类 号：X823[环境科学与工程—环境工程]