莱西市一次停工停产中大气颗粒物变化特征及潜在源分析  

Analysis of variation characteristics and potential sources of atmospheric particulate matter in Laixi City during lockdown period

作　　者：齐海青 郭一令[1] 邵文歆 薛梅[1] 张宜升[1] QI Haiqing;GUO Yiling;SHAO Wenxin;XUE Mei;ZHANG Yisheng(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266525

出　　处：《青岛理工大学学报》2022年第5期75-79,共5页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(41405114)。

摘　　要：利用莱西市2020年1月25日-2月10日停工停产期间与2017-2019年同期污染物监测资料,分析对比了PM2.5,PM10,PM2.5/PM10变化特征,并结合后向轨迹聚类和潜在源分析法探究了停工停产期间(2020年2月8日-2月10日)一次重污染天气PM2.5,PM10的区域输送和潜在源区分布。结果表明:2020年1月25日-2月10日停工停产期间与2017-2019年同期相比,PM2.5和PM10浓度变化幅度不大,与整个冬季进行比较,停工停产期间PM2.5和PM10分别降低了7.9%,12.9%,PM2.5/PM10比值2020年最高,为0.76,说明停工停产期间细颗粒物污染较为严重;莱西市停工停产期间一次重污染天气过程在西北方向和西南方向各有一个污染物气流输送通道,潜在源区主要分布在莱西及周边地区、河北南部、山东北部,由于气流轨迹不同,山东东南部、河南中部也有一定的贡献。Based on the pollutant monitoring data of Laixi City from January 25th to February 10th,2020 and the same period of 2017-2019,we analyzed and compared the characteristics of PM2.5,PM10,PM2.5/PM10 changes during the production shutdown,and explored the regional transportation and potential source distribution of PM2.5 and PM10 in a severely polluted weather during the epidemic period(February 8 to February 10)by combining the backward trajectory clustering and potential source analysis method.The results show that during the epidemic period from January 25 to February 10,2020,the changes in PM2.5 and PM10 concentrations were not significant,compared with the same period in 2017-2019.Compared with the entire winter,PM2.5 and PM10 decreased during the epidemic period.The ratio of PM2.5/PM10 was the highest in 2020,at 0.76,indicating that the pollution of fine particles was more serious during the strict control of the epidemic.During the epidemic in Laixi City,there was pollution in the northwest and southwest in the course of the heavily polluted weather process.The potential source areas are mainly distributed in Laixi and surrounding areas,southern Hebei and northern Shandong.Due to different airflow trajectories,southeastern Shandong and central Henan also make a certain contribution to the pollution.

关 键 词：PM2.5 PM10 浓度变化特征 后向轨迹 潜在源区分析 

分 类 号：X513[环境科学与工程—环境工程]