Impacts of synoptic circulation on surface ozone pollution in a coastal eco-city in Southeastern China during 2014-2019  

作　　者：Yu Yan Xuesong Wang Zhengchao Huang Kun Qu Wenbin Shi Zimu Peng Limin Zeng Shaodong Xie Yuanhang Zhang 

机构地区：[1]State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [2]International Joint Laboratory for Regional Pollution Control,Ministry of Education,Beijing 100816,China [3]Center for Environmental Education and Communications of Ministry of Ecology and Environment,Beijing 100020,China [4]Beijing Innovation Center for Engineering Science and Advanced Technology,Peking University,Beijing 100871,China [5]CAS Center for Excellence in Regional Atmospheric Environment,Chinese Academy of Sciences,Xiamen 361021,China

出　　处：《Journal of Environmental Sciences》2023年第5期143-157,共15页环境科学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Nos.2018YFC0213204,2018YFC0213506).

摘　　要：The coastal eco-city of Fuzhou in Southeastern China has experienced severe ozone(O_(3))episodes at times in recent years.In this study,three typical synoptic circulations types(CTs)that influenced more than 80%of O_(3) polluted days in Fuzhou during 2014-2019 were identified using a subjective approach.The characteristics of meteorological conditions linked to photochemical formation and transport of O_(3) under the three CTs were summarized.Comprehensive Air Quality Model with extensions was applied to simulate O_(3) episodes and to quantify O_(3) sources from different regions in Fuzhou.When Fuzhou was located to the west of a high-pressure system(classified as“East-ridge”),more warm southwesterly currents flowed to Fuzhou,and the effects of cross-regional transport from Guangdong province and high local production promoted the occurrence of O_(3) episodes.Under a uniform pressure field with a low-pressure system occurring to the east of Fuzhou(defined as“East-low”),stagnant weather conditions caused the strongest local production of O_(3) in the atmospheric boundary layer.Controlled by high-pressure systems over the mainland(categorized as“Inland-high”),northerly airflows enhanced the contribution of cross-regional transport to O_(3) in Fuzhou.The abnormal increases of the“East-ridge”and“Inland-high”were closely related to O_(3) pollution in Fuzhou in April and May 2018,resulting in the annual maximum number of O_(3) polluted days during recent years.Furthermore,the rising number of autumn O_(3) episodes in 2017-2019 was mainly related to the“Inland-high”,indicating the aggravation of cross-regional transport and highlighting the necessity of enhanced regional collaboration and efforts in combating O_(3) pollution.

关 键 词：Ozone pollution Synoptic circulation Regional transport Chemical production 

分 类 号：X515[环境科学与工程—环境工程] P434[天文地球—大气科学及气象学]