2018年国庆前后广东省臭氧污染过程分析  

Analysis of Ozone Pollution Process in Guangdong Province around the National Day in 2018

作　　者：沈劲[1,2] 刘瑀菲 晏平仲[3,4] 汪宇 潘泽凯[1] 陈多宏 SHEN Jin;LIU Yufei;YAN Pingzhong;WANG Yu;PAN Zekai;CHEN Duohong(State Environmental Key Laboratory of Regional Air Quality Monitoring,Guangdong Environmental Monitoring Center,Guangzhou 510308,China;Guangdong Environmental Protection Key Laboratory of Secondary Air Pollution Research,Guangdong Environmental Monitoring Center,Guangzhou 510308,China;Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;3Clear Technology Co.,Ltd.,Beijing 100029,China)

机构地区：[1]广东省环境监测中心,国家环境保护区域空气质量监测重点实验室,广东广州510308 [2]广东省环境监测中心,广东省环境保护大气二次污染研究重点实验室,广东广州510308 [3]中国科学院大气物理研究所,北京100029 [4]中科三清科技有限公司,北京100029

出　　处：《安全与环境工程》2020年第1期75-80,共6页Safety and Environmental Engineering

基　　金：国家重点研发计划项目(2017YFC0212806、2018YFC0213903);广东省科技发展专项基金项目(2017B020216007);国家自然科学基金项目(91544215)。

摘　　要：2018年国庆前后,广东省出现了一次大范围臭氧(O3)污染事件,全省共出现111个城次空气质量轻度污染、8城次空气质量中度污染,珠三角西南部的江门市空气污染最为严重,共出现3天中度污染。采用三维空气质量模型的综合过程分析模块,分析了不同物理化学过程对本次O3污染事件污染过程的影响与贡献。结果表明:本次O3污染事件中,在持续偏东北气流的影响下,江门等珠三角西南部城市处于下风向,其较严重的近地面层O3污染主要是由水平输送导致;上边界O3往下输送主要对下午和夜间的O3有正贡献,但化学过程对近地面O3有净消耗作用,几十米以上的高空化学过程在白天则主要表现为O3净生成;O3的城市间输送导致下风向地区出现较严重的O3污染,秋季是珠三角地区的O3污染季节,建议加强珠三角中东部等地的O3前体物控制,以减轻下风向城市的O3污染。Around the National Day in 2018,a large-scale ozone pollution incident occurred in Guangdong Province,there were 111 cities with mild air quality pollution and 8 cities with moderate air quality pollution in the whole province.Jiangmen City in the southwest of the Pearl River Delta has the most serious air pollution with 3 days of moderate pollution.This paper applies the integrated process analysis module of 3 D air quality model CAMx to analyzing the influence and contribution of different physical and chemical processes on the ozone pollution event.The results show that in this pollution incident, the continuous northeast wind pushes the horizontal transportation to bring serious near-surface ozone pollution in cities in southwest Pearl River Delta such as Jiangmen in downwind areas.Downward transport of ozone from the upper boundary mainly contributes positively to ozone in the afternoon and at night,but chemical processes has a net depletion effect on near-surface ozone throughout the days.The chemical processes above tens of meters contribute net generation of ozone during day time.The trans-city transportation of ozone causes serious ozone pollution in the downwind area.Autumn is ozone pollution season in the Pearl River Delta area.The results suggest that we should strengthen the control of ozone precursors in the Middle East of the Pearl River Delta to reduce the ozone pollution in downwind cities.

关 键 词：臭氧污染事件 污染过程分析 广东省 国庆期间 

分 类 号：X511[环境科学与工程—环境工程]