摘要
于2021年4—5月的云南省臭氧(O_(3))污染事件频发时段,在昆明市开展首次气态亚硝酸(HONO)观测,并结合WRF-Chem空气质量模式,评估添加HONO潜在来源与否对O_(3)浓度的影响。模拟结果表明,使用2020年MEIC清单能较好地模拟昆明市的HONO、二氧化氮(NO_(2))、O_(3)和细颗粒物(PM_(2.5))等污染物。HONO潜在来源显著增强了大气氧化性和羟基自由基(OH)的生成速率,引起昆明市距地面4km范围内O_(3)增量为(2~6)×10^(-9)(相应增幅约2%~8%)、近地面O_(3)增量为(4~7)×10^(-9),并在一定程度上影响O_(3)-VOCs-NOx的敏感性。研究结果可加深对云贵高原地区HONO、大气氧化性及O_(3)生成的认识,为区域O_(3)污染治理提供参考。
The first nitrous acid(HONO)observation was conducted in Kunming of Yunnan Province,from April to May 2021 with frequent ozone(O_(3))pollution events.To evaluate the impact of HONO on O_(3),the WRF-Chem model simulations were conducted,with two cases including or excluding potential HONO sources.Based on the comparison between simulations and the corresponding observations,it was found that the application of the MEIC inventory(version 2020)could reasonably simulate HONO,nitrogen dioxide(NO_(2)),O_(3) and fine particulate matter(PM_(2.5))in urban Kunming.The additional HONO sources noticeably enhanced atmospheric oxidation capacity in Kunming and accelerated the hydroxyl radical(OH)production rate,leading to an O_(3) enhancement of(2-6)×10^(-9)with the corresponding percentage enhancement of 2%-8%at the Kunming site within the height of 0-4 km and an O_(3) enhancement of(4-7)×10^(-9)near the ground at the Kunming site and its surrounding area.The O_(3)-VOCs-NOx sensitivity was also influenced by the potential HONO sources.This study deepened the understanding of HONO,atmospheric oxidation capacity and O_(3) formation in the Yunnan-Guizhou Plateau,and could be helpful for regional O_(3) pollution control.
作者
张静唯
龚元均
冉海艳
谭雅娴
屈玉
安俊岭
陆克定
董华斌
邱飞
杨健
ZHANG Jingwei;GONG Yuanjun;RAN Haiyan;TAN Yaxian;QU Yu;AN Junling;LU Keding;DONG Huabin;QIU Fei;YANG Jian(Yunnan Key Laboratory of Meteorological Disasters and Climate Resources in the Greater Mekong Subregion,Yunnan University,Kunming 650500;State Key Laboratory Joint of Atmospheric Ozone Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871;Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029;Yunnan Ecological Environment Monitoring Center,Kunming 650034;Kunming Research Academy of Eco-Environmental Sciences,Kunming 650032)
出处
《北京大学学报(自然科学版)》
北大核心
2025年第2期325-334,共10页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金(42107124)
国家自然科学基金与以色列科学基金会合作研究项目(42161144010)
云南省自然科学基金(202302AN 360006)
云南省基础研究计划(202401CF070180)
昆明市生态环境局“昆明市臭氧污染来源解析相关研究”项目(ZD20200007)
国家重点研发计划(2023YFC3706100)资助。
