Long-term winter observation of nitrous acid in the urban area of Beijing

作     者：Chaofan Lian Weigang Wang Yan Chen Yusheng Zhang Jingwei Zhang Yongchun Liu Xiaolong Fan Chang Li Junlei Zhan Zhuohui Lin Chenjie Hua Wenyu Zhang Mingyuan Liu Junling Li Xuefei Wang Junling An Maofa Ge Chaofan Lian;Weigang Wang;Yan Chen;Yusheng Zhang;Jingwei Zhang;Yongchun Liu;Xiaolong Fan;Chang Li;Junlei Zhan;Zhuohui Lin;Chenjie Hua;Wenyu Zhang;Mingyuan Liu;Junling Li;Xuefei Wang;Junling An;Maofa Ge

作者机构：State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of the Chinese Academy of SciencesBeijing 100049China Aerosol and Haze LaboratoryAdvanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC)Institute of Atmospheric Physics(IAP)Chinese Academy of SciencesBeijing 100029China State Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of Environmental SciencesBeijing 100012China Center for Excellence in Urban Atmospheric EnvironmentInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第4期

页      面：334-342页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.41931287 41822703 and 91744204) 

主　　题：Nitrous acid Field observation Winter air pollution 

摘      要：The particulate matter(PM)pollution has been significantly improved by carrying out various valid emission control strategies since 2013 in China.Meanwhile the variation trend of nitrous acid(HONO)is worthy to investigate due to its vital role in the atmospheric oxidation process.In this study,field observation in the winter is conducted to investigate the concentration of HONO in an urban area of Beijing.In the winter of 2019,the mean HONO concentration is 1.38 ppbV during the whole winter.Photo-enhanced NO_(2)heterogeneous reactions on the ground and aerosol surfaces were found as the possible daytime sources of HONO.Compared to O_(3),photolysis of HONO dominates the primary OH sources during the winter time.To understand the HONO pollution patterns by years variation,multi-year data is summarized and finds that primary pollutants including CO and NO decreased,but secondary pollutants i.e.,HONO(mostly generated via secondary process)increased.Our study highlights the requirement to mitigate secondary pollution by control HONO concentration.