京津冀地区2015~2020年臭氧持续污染事件特征、气象影响及潜在源区分析  

Characteristics,meteorological impacts and potential sources of persistent ozone pollution events in Beijing-Tianjin-Hebei Region during 2015~2020

作　　者：张莹 许建敏 汪瑶 苏宝山 吴燕星 胡婷婷 刘润 ZHANG Ying;XU Jian-min;WANG Yao;SU Bao-shan;WU Yan-xing;HU Ting-ting;LIU Run(Institute for Environmental and Climate Research,Jinan University,Guangzhou 511443,China;Guangdong-Hong Kong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality,Guangzhou 511443,China)

机构地区：[1]暨南大学环境与气候研究院,广东广州511443 [2]粤港澳环境质量协同创新联合实验室,广东广州511443

出　　处：《中国环境科学》2023年第6期2714-2721,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(91644222,92044302)。

摘　　要：基于京津冀地区2015~2020年臭氧小时浓度数据和气象再分析数据,利用广义加性模型、潜在源贡献函数法、浓度权重轨迹法分析了京津冀地区臭氧持续污染事件特征、气象影响和潜在源区.结果表明,京津冀地区持续3d及以上的臭氧污染事件(OPE3)出现天数由2015年的24d上升到2020年的76d,占臭氧污染总天数的比例最高达到85%;OPE3天数的月变化特征与臭氧浓度的变化特征高度一致,在5~9月的相关性达0.97;京津冀地区OPE3发生的天气形势主要为高温、低湿、异常南风、异常反气旋及明显下沉气流;以京津冀地区的典型代表城市北京为例,OPE3期间气团主要来自于北京以南地区(71.2%),以短距离传输为主,主要潜在源区是河北省南部、山西省东北部、河南省东北部以及山东省北部,污染轨迹的贡献率约79.3%.Based on hourly observed ozone concentration and meteorological reanalysis data from 2015 to 2020,this study analyzed the persistent ozone pollution events,their relationship to the meteorological factors and the potential sources in Beijing-Tianjin-Hebei(BTH)region via the generalized additive model,potential source contribution function and concentration weight trajectory methods.The results show that the number of ozone pollution events lasting three or more consecutive days(OPE3)in BTH increased from 24 days in 2015 to 76days in 2020,accounting for 85%of the total ozone pollution days.The monthly variation in OPE3days were highly consistent with the ozone concentration,with a correlation coefficient of 0.97 from May to September.For example,OPE3 in Beijing mainly occurred under a weather pattern characterized by abnormal anticyclonic,high temperature,low relative humidity,anomalous southerlies and downward air flow.During OPE3,the air mass came mainly from the south of Beijing through a short-distance transport(71.2%).The primary potential sources included the southern Hebei Province,northeastern Shanxi Province,northeastern Henan Province,and northern Shandong Province,together contributing about 79.3%to the OPE3in Beijing.

关 键 词：京津冀 臭氧持续污染事件 气象因素 潜在源贡献因子 浓度权重轨迹 

分 类 号：X515[环境科学与工程—环境工程] X16