基于CMAQ/ISAM空气质量模型的北京市夏季臭氧来源解析研究  

Source Apportionment of Ozone in Summer in Beijing Based on CMAQ/ISAM Air Quality Model

作　　者：张树宪 李洋[1] 张众志 杜晓惠[1,2] 徐双喜 孟凡 ZHANG Shuxian;LI Yang;ZHANG Zhongzhi;DU Xiaohui;XU Shuangxi;MENG Fan(Research Institute of Atmospheric Environment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;College of Water Sciences,Beijing Normal University,Beijing 100875,China)

机构地区：[1]中国环境科学研究院大气环境研究所,北京100012 [2]北京师范大学水科学研究院,北京100875

出　　处：《环境科学研究》2022年第5期1183-1192,共10页Research of Environmental Sciences

基　　金：国家重点研发计划项目(No.2018YFC0213500,2017YFC0213003)。

摘　　要：为了解北京市夏季臭氧(O_(3))污染的特征与来源,采用区域空气质量模型(CMAQ)的综合源解析功能(ISAM)对北京市2019年6月不同区域的近地面O_(3)浓度及其来源贡献进行了数值模拟计算,量化了北京市、天津市、河北省、京津冀以外省份以及全球背景共14类NO_(x)和VOCs排放源对北京市不同区域O_(3)污染的贡献.结果表明:①北京市不同地区O_(3)及其前体物来源存在显著差异,城区及近郊区NO_(x)和VOCs均主要来自于北京市本地排放,本地源排放对城区及近郊区的NO_(x)贡献(39.7%~46.4%)显著大于对远郊区的贡献(19.9%~38.8%),本地源排放对城区及近郊区的VOCs贡献(51.1%~75.8%)大于对远郊区的贡献(19.5%~39.6%).②远郊区NO_(x)和VOCs浓度更易受非本地排放的输送影响.③O_(3)主要来源于包括模拟区域外以及全球背景的边界传输贡献,边界传输对北京市不同受体区域的贡献均大于52.6%.④北京市本地源排放对城区及近郊区O_(3)的贡献(6.8%~18.3%)大于对远郊区的贡献(2.4%~7.6%),京津冀以外源区的排放对北京市远郊区的贡献(5.2%~6.4%)大于对城区及近郊区的贡献(2.7%~4.4%),说明本地排放对远郊区影响相对较小,远郊区O_(3)浓度易受北部燕山山脉和太行山的阻隔影响.因地理位置及地形原因,河北省不同源区对北京市不同区域O_(3)浓度的贡献存在一定差异.研究显示,控制北京市夏季O_(3)污染应综合考虑城区与郊区O_(3)来源的差异性,做好周边区域的联防联控.In order to understand the characteristics and sources of ozone(O_(3))pollution in Beijing in summer,the Integrated Source Apportionment Method(ISAM)of the Community Multiscale Air Quality model(CMAQ)was applied to numerically simulate the near-surface O_(3) concentrations and their source contributions in different regions of Beijing in June 2019.The contributions of 14 types of NO_(x) and VOCs emission sources from Beijing City,Tianjin City,Hebei Province,provinces outside Jin-Jing-Ji Region and the global sources(contribution from outside the simulation area)to O_(3) pollution in different regions of Beijing was quantified.The results showed that:(1)There were significant differences in the sources of O_(3) and its precursors in different regions of Beijing.Both NO_(x) and VOCs in urban and suburban areas are mainly derived from local emissions in Beijing.The contribution of NO_(x) emitted by local sources to urban and suburban areas(39.7%-46.4%)was significantly greater than that of outer suburban areas(19.9%-38.8%),and the contribution of local sources to VOCs in urban and suburban areas(51.1%-75.8%)was greater than that of outer suburban areas(19.5%-39.6%).(2)NO_(x) and VOCs concentrations in remote suburban areas were more susceptible to the non-local emissions.(3)O_(3) was mainly derived from the contribution of boundary transport,including the simulated extra-regional region as well as global background,and the contribution of boundary transport to different receptor areas in Beijing exceeded 52.6%.(4)The contribution of local source emissions to O_(3) in urban and suburban areas of Beijing(6.8%-18.3%)was greater than that of outer suburbs(2.4%-7.6%),while emissions from regions outside Beijing-Tianjin-Hebei contributed to the outer suburbs of Beijing(5.2%-6.4%)was greater than the contribution to urban and suburban areas(2.7%-4.4%).It indicated that the outer suburbs had relatively small local emission characteristics and were susceptible to the blocking of Yanshan and Taihang Mountains in the north.Due

关 键 词：北京市 臭氧(O_(3)) 源解析 区域多尺度空气质量(CMAQ)模型 

分 类 号：X511[环境科学与工程—环境工程]