2016~2020年上海臭氧高发季光化学污染特征及敏感性分析  

Analysis of Characteristics and Sensitivity of Photochemical Pollution During High Ozone Season in Shanghai from 2016 to 2020

作　　者：金丹 JIN Dan(Shanghai Environmental Monitoring Center,Shanghai 200235,China)

机构地区：[1]上海市环境监测中心,上海200235

出　　处：《环境科学》2024年第7期3799-3807,共9页Environmental Science

基　　金：国家重点研发计划项目(2022YFC3703501)。

摘　　要：重点臭氧污染区域和城市的臭氧生成敏感性分析是近地面臭氧(O_(3))污染防控的重要依据.基于上海市淀山湖站(郊区)、浦东站(城区)和新联站(工业区站)这3个典型站点2016~2020年5年间O_(3)、VOCs和NO_(x)数据,利用观测模型定量分析5年间臭氧高发季O_(3)与前体物(VOCs和NO_(x))之间的非线性关系.结果表明,2016~2020年间,上海市近地面O_(3)高发月份为4~9月,其中,高峰值出现在6~8月;VOCs体积分数和NO_(2)浓度对浦东站的O_(3)浓度具备较强的指示意义,淀山湖站的O_(3)浓度主要是受区域性环境、气象因素和跨区域传输影响,新联站O_(3)浓度为环境背景浓度与工业区光化学污染的叠加效应.浦东站和淀山湖站处于VOCs控制区,新联站2016~2019年整体处于NO_(x)控制区附近,2020年开始逐步向VOCs控制区转变;浦东站、淀山湖站和新联站的L_(·OH)均为:NO_(x)控制区>协同控制区>VOCs控制区.The sensitivity analysis of ozone generation in key ozone-polluted regions and cities is an important basis for the prevention and control of near-surface ozone(O_(3))pollution.Based on the five-year data of ozone,VOCs,and NO_(x) from three typical stations in Shanghai,namely Dianshan Lake Station(suburban area),Pudong Station(urban area),and Xinlian Station(industrial area)from 2016 to 2020,the nonlinear relationship between ozone and precursors(VOCs and NO_(x))during the high-ozone season in the five years was quantitatively analyzed using an observation model.The results showed that the peak months of near-surface ozone in Shanghai were from April to September during 2016 to 2020,with the highest values appearing from June to August.The volume fraction of VOCs and NO_(2) concentration had a strong indicative significance for the O_(3) concentration at Pudong Station.The O_(3) concentration at Dianshan Lake Station was mainly influenced by regional environment,meteorological factors,and cross-regional transmission.The ozone concentration at Xinlian Station was a combination of environmental background concentration and industrial area photochemical pollution.Pudong Station and Dianshan Lake Station were in the VOCs control zone.Xinlian Station was gradually closer to the NO_(x) control zone from 2016 to 2019,transitioning to the VOCs control zone since 2020.The L_(·OH) of Pudong Station,Dianshan Lake Station,and Xinlian Station were:NO_(x) control area>collaborative control area>VOCs control area.

关 键 词：臭氧(O_(3)) 挥发性有机物(VOCs) 氮氧化物(NO_(x)) 相对增量反应性(RIR) 光化学反应 臭氧生成敏感性 

分 类 号：X515[环境科学与工程—环境工程] X831