摘要
收集了湖州市2015—2019年国控大气监测站数据,分析了湖州市近地面大气臭氧(O_(3))质量浓度随时间变化的特征及一次O_(3)污染过程及成因。结果表明:2015—2019年O_(3)污染凸显,日最大8 h滑动平均值第90百分位数(O_(3)-8 h-90 per)上升至187μg/m^(3);受气温、降雨量和相对湿度的共同作用,O_(3)月变化曲线呈“M”型;O_(3)日变化峰值出现在14:00—15:00,且峰值明显升高,峰宽逐年增大。2018年6月发生一次O_(3)污染,研究发现:高温、低湿增强了O_(3)的光化学转化;夜间NO_(2)和CO等前体物累积以及O_(3)残留是O_(3)污染的重要原因;风向和气团后向轨迹表明安徽东南部城市和南、东南、东部杭州湾城市的污染物传输对此次湖州市O_(3)污染有较大贡献。
This paper analyzed the temporal variation of the near-surface atmospheric ozone(O_(3))in Huzhou city by collecting the monitoring data of National Controlled Atmosphere Monitoring Stations in Huzhou city from 2015 to 2019.Nevertheless,the paper also discussed a typical ozone pollution process.The results showed that O_(3) pollution was prominent from 2015 to 2019,and the 90th percentile of the daily maximum eight-hour moving average(O_(3)-8 h-90 per)rose up to 187μg/m^(3).Due to synergy influence of temperature,precipitation and relative humidity,the monthly variation curve of O_(3) presented an“M”shape.The daily variation peak of O_(3) appeared between 14:00 to 15:00 with significant increase,and the peak width increased year by year.There was an O_(3) pollution process occurred in June 2018,and it was found that the photochemical conversion of O_(3) was enhanced by high temperature and low humidity.The accumulation of precursors,such as NO_(2) and CO at night,as well as O_(3) residues contributed the O_(3) pollution.The wind direction and the backward trajectory of the air mass showed that the transmission of pollutants from the east-western cities of the Anhui province,the south,southeast,east part of the Hangzhou Bay had a greater impact on the O_(3) pollution process.
作者
陈金媛
郑凯允
朱俊
马骏峰
晁娜
王晓元
梁泉
杨欣洁
吴建
CHEN Jinyuan;ZHENG Kaiyun;ZHU Jun;MA Junfeng;CHAO Na;WANG Xiaoyuan;LIANG Quan;YANG Xinjie;WU Jian(College of Environment,Zhejiang University of Technology,Hangzhou 310014,China;Environmental Science Research&Design Institute of Zhejiang Province,Hangzhou 310007,China;Environmental Emergency and Accident Investigation Center of Nanxun District of Huzhou City,Huzhou 313000,China;Zhejiang Ecological and Environment Monitoring Center,Hangzhou 310007,China;Hangzhou Meteorological Bureau of Zhejiang Province,Hangzhou 310051,China)
出处
《浙江工业大学学报》
CAS
北大核心
2021年第6期683-690,共8页
Journal of Zhejiang University of Technology
基金
国家重点研发计划(2018YFC0213806)。
