基于三维空气质量模型的淄博市臭氧及前体物来源解析  

Source Analysis of Ozone and Its Precursors in Zibo Based on 3-D Air Quality Model

作　　者：张馨心 赵秀颖 黄凌 薛金 卞锦婷 王杨君[1] 李莉 ZHANG Xin-xin;ZHAO Xiu-ying;HUANG Ling;XUE Jin;BIAN Jin-ting;WANG Yang-jun;LI Li(Institute of Environmental Pollution and Health,School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China;Shandong Zibo Ecological Environment Bureau Jingkai District Branch Bureau,Zibo 255000,China)

机构地区：[1]上海大学环境与化学工程学院,环境污染与健康研究所,上海200444 [2]山东省淄博市生态环境局经开区分局,淄博255000

出　　处：《环境科学》2023年第12期6576-6585,共10页Environmental Science

基　　金：大气重污染成因与治理攻关项目(DQGG202119);国家自然科学基金青年科学基金项目(42005112)。

摘　　要：基于WRF-CMAQ模型中的ISAM模块对2021年6月淄博市夏季O_(3)及其前体物NO_(2)和VOCs进行来源解析,明确O_(3)及其前体物的来源(区域和源类),并将O_(3)日最大8 h平均值(MDA8)高于(低于)160μg·m^(-3)的时段划分为污染(清洁)时段,对比了清洁天与污染天的来源差别并选取了典型污染时段进行来源解析和过程分析.结果表明,淄博市夏季NO_(2)主要来自本地排放,贡献率达45.1%,道路移动源(33.8%)和天然源(20.7%)是最主要的本地NO_(2)来源.天然源、溶剂源和石化行业对VOCs的贡献占据主导地位,总贡献达78.5%.MDA8的本地贡献是21.4%,区域外传输(32%)和周边城市(26.8%)影响不可忽略.在本地排放源中,道路移动源、电力行业和建材行业对本地MDA8贡献率在10.9%~18.8%.O_(3)污染天时淄博市MDA8受本地贡献及区域内各城市贡献总和均有所上升.但从淄博市本地源类贡献的变化来看,在不同的污染情况下本地各污染源排放贡献率相近.Based on the ISAM module in the WRF-CMAQ model,this study analyzed the source contribution(both regional and sectoral)of O_(3) and its precursors(NO_(2) and VOCs)in Zibo in June 2021.Days with a maximum daily 8-h average(MDA8)O_(3) higher(lower)than 160μg·m^(-3) were defined as polluted(clean)days.Differences in the source contribution between clean days and polluted days were compared,and a typical pollution period was selected for further process analysis.The results showed that NO_(2) in Zibo mainly came from local emissions in summer,with a relative contribution of 45.1%.Vehicle emissions(33.8%)and natural sources(20.7%)were the primary NO_(2) sources.VOC contributions from natural sources,solvent usage,and the petrochemical industry were significant,with a total contribution of 78.5%.The MDA8 contribution from local sources was 21.4%,whereas the impact of regional transport(32%)and surrounding cities(26.8%)was also substantial.Among local emission sources,vehicle emissions,the power industry,and the building materials industry contributed 10.9%-18.8% to local MDA8.On O_(3) pollution days,the MDA8 contribution from local emissions and surrounding cities increased.However,the relative contributions from local sources were similar under different pollution conditions.

关 键 词：臭氧(O_(3)) 挥发性有机物(VOCs) 氮氧化物(NO_(x)) 来源解析 区域多尺度空气质量(CMAQ)模型 华北平原 

分 类 号：X515[环境科学与工程—环境工程]