气象2023，Vol.49Issue(11)：1359-1370,12.DOI:10.7519/j.issn.1000-0526.2023.052401
汾渭平原PM2.5-O3复合污染特征及气象成因分析
Characteristics of PM2.5-O3 Compound Pollution and Meteorological Impact in Fenwei Plain
摘要
Abstract
PM2.5 and O3 which interact with each other have become the most important pollutants in the cities of Fenwei Plain.The pollution often occurs simultaneously in warm seasons and is closely related to meteorological conditions.Based on the daily PM2.5 and O3 concentration data,surface meteorological ob-servation data and ERA5 high-altitude reanalysis data of 12 cities in the Fenwei Plain from 2015 to 2021,the spatio-temporal characteristics of PM2.5 and O3 in the Fenwei Plain,as well as the relationship between PM2.5 and O3 when compound pollution occurs are analyzed.Besides,the impact of local meteorological conditions and synoptic situation on compound pollution is also studied.The results show that the average annual PM2.5 and MDA8 O3(maximum daily 8 h average ozone)concentrations in the Fenwei Plain began to decline continuously in 2017 and 2018,respectively,and the number of compound pollution days also be-gan to decrease continuously after 2019.Compound pollution mainly occurs in March to September,fre-quently seen in the cities of eastern Fenwei Plain,mostly in condition of high temperature and low humidi-ty.Finally,the synoptic circulation situation of compound pollution is divided into four types by principal component analysis with the T-PCA algorithm,featured with the northwest or westerly air flow in high-al-titude and the southerly wind or breeze in the low-level warm zone.These findings could provide some ba-sis for controlling pollution in the Fenwei Plain and are of great significance for cooperative governance of PM2.5 and O3 pollution.关键词
汾渭平原/PM2.5和O3复合污染/T-PCA分型/气象成因Key words
Fenwei Plain/PM2.5 and O3 compound pollution/T-PCA typing/meteorological impact分类
资源环境引用本文复制引用
周涛,周青,张勇,吴昱树,孙健..汾渭平原PM2.5-O3复合污染特征及气象成因分析[J].气象,2023,49(11):1359-1370,12.基金项目
山西省气象局科学技术研究重点项目(SXKZDTC20226302)、中国环境科学研究院重点课题(DQGG2021101)和秦岭和黄土高原生态环境气象重点实验室开放研究基金重点课题(2021K-10)共同资助 （SXKZDTC20226302）
