成渝地区臭氧生成敏感性时空分布及影响因素  

Spatial and Temporal Characteristics of Ozone Formation Sensitivity and Its Influencing Factors in Chengdu-Chongqing Area

作　　者：胥雯 杨皓 何敏 杨震 张洋[1,2] 刘志红 何雨明[3] XU Wen;YANG Hao;HE Min;YANG Zhen;ZHANG Yang;LIU Zhi-hong;HE Yu-ming(College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China;Chengdu Plain Urban Meteorology and Environment Observation and Research Station of Sichuan Province,Chengdu University of Information Technology,Chengdu 610225,China;Sichuan Environmental Protection Technology Engineering Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]成都信息工程大学资源环境学院,成都610225 [2]成都平原城市气象与环境四川省野外科学观测研究站,成都610225 [3]四川省环保科技工程有限责任公司,成都610041

出　　处：《环境科学》2025年第2期736-745,共10页Environmental Science

基　　金：成都信息工程大学引进人才科研启动项目(KYTZ202130)。

摘　　要：为研究成渝地区臭氧生成敏感性变化特征,采用OMI卫星观测的对流层柱浓度FNR指示剂(HCHO/NO_(2)),分析夏季臭氧生成敏感性(OFS),并基于地理探测器分析污染源排放、气象因子及其交互作用对OFS的影响.结果表明:(1)成渝地区夏季OFS分区以协同控制区为主,面积占比约为42.42%;VOCs控制区较少,主要分布在成都市和重庆市主城区,面积占比约为16.37%;NO_(x)控制区主要分布在雅安市、乐山市、宜宾市、泸州市以及重庆市东部,面积占比约为41.21%.(2)从月份变化来看,6~8月,VOCs控制区面积逐渐减少,8月达到最低值,占比仅有3.53%,9月VOCs控制区面积增加显著.(3)大气污染物(CO、PM_(2.5)、NMVOC和NO_(x))排放是影响成渝地区夏季OFS的主要因素,随着排放量的增加,FNR逐渐减小,OFS趋向于VOCs控制区.(4)地表大气压力(SP)、2 m气温(T2),大气柱总水量(TCW)是影响成渝地区夏季OFS变化的3个主要气象因素,三者均与FNR呈负相关,SP、T2,TCW的值越大,OFS更趋向于VOCs控制.(5)因子间的交互作用会加剧臭氧生成敏感性的变化,污染物和气象因子之间的交互作用是成渝地区夏季OFS变化的主要驱动力.To study the characteristics of ozone formation sensitivity changes in the Chengdu-Chongqing area,the summer ozone formation sensitivity(OFS) was analyzed using satellite observation of the OMI tropospheric column concentration of HCHO and NO_2.Additionally,the effects of meteorological factors,source emissions,and their interactions on OFS were identified with the geodetic detector.The results showed that the summer OFS zoning in the Chengdu-Chongqing area was dominated by a transitional regime,with an area share of 42.42%.Less VOCs-limited regime was observed,which was mainly distributed in the urban areas of Chengdu City and Chongqing Municipality,with an area share of 16.37%.The NO_x-limited regime was mainly located in Ya.an City,Leshan City,Yibin City,Luzhou City,and the eastern part of Chongqing Municipality,with an area share of 41.21%.The area of the VOCs-limited regime gradually decreased from June to August and reached the lowest value in August,accounting for only 3.53%,and the area of the VOCslimited regime increased significantly in September.Pollutant emissions(CO,PM_(2.5),NMVOC,and NO_x) were the main factors affecting summer OFS in the Chengdu-Chongqing area.With the increase in emissions,the FNR gradually decreased,and the OFS tended to be the VOCs-limited regime.SP,T2,and TCW were the three main meteorological factors that affected the change in summer OFS in the Chengdu-Chongqing area.All three factors were negatively correlated with FNR;the larger the values of SP,T2,and TCW,the more easily OFS changed to a VOCs-limited regime.Interactions between factors exacerbated OFS changes and were the main drivers of spatial and temporal variations for summer OFS in the Chengdu-Chongqing area.

关 键 词：臭氧检测仪(OMI) 臭氧生成敏感性(OFS) 时空分布 影响因素 成渝地区 

分 类 号：X515[环境科学与工程—环境工程]