干旱区地理2025，Vol.48Issue(3)：405-420,16.DOI:10.12118/j.issn.1000-6060.2024.249
2015-2023年"乌-昌-石"城市群PM2.5与PM10时空变化及潜在源分析
Spatiotemporal variations and potential sources of PM2.5 and PM10 in the"Urumqi-Changji-Shihezi"urban agglomeration from 2015 to 2023
摘要
Abstract
Using the HYSPLIT model and other methods,we analyzed the spatiotemporal variations and sources of PM2.5 and PM10 in the Urumqi,Changji Hui Autonomous Prefecture,and Shihezi urban agglomeration from 2015 to 2023.The results indicate the following:(1)Spatial scale:From 2019 to 2022,PM2.5 and PM10 concentra-tions were higher in the central and northwestern parts of the urban agglomeration.PM10 concentrations showed an inverse relationship with elevation.(2)Temporal scale:From 2015 to 2023,on an interannual scale,the annual average concentrations of PM2.5 and PM10 in Urumqi City and Changji Hui Autonomous Prefecture showed an overall downward trend.In contrast,Shihezi City and Wujiaqu City experienced significant decreases in PM2.5 and PM10 concentrations only in 2023.On a seasonal scale,the average concentrations of PM2.5 and PM10 general-ly declined,with the largest relative reduction in spring,followed by summer and autumn,and the smallest reduc-tion in winter.On a monthly scale,the average concentrations of PM2.5 and PM10 displayed a"U-shaped"distribu-tion,with a significant reduction in January.On a weekly scale,heavy weekday traffic congestion led to a"nega-tive weekend effect"for PM2.5 concentrations across all four cities,while PM10 concentrations exhibited a"posi-tive weekend effect"only in Urumqi City.On a daily scale,PM2.5 and PM10 concentrations in winter were signifi-cantly higher than in other seasons.PM2.5 concentrations decreased overall,with fewer high-concentration days,while PM10 concentrations fluctuated more due to dust events.(3)Pollution sources(2019-2021):In 2019,pollu-tion was predominantly from local sources,resulting in widespread and high concentrations.In 2020,pandemic-related restrictions reduced local emissions,shifting pollution sources toward Central Asia.In 2021,pollution sources expanded again,returning to domestic regions.This study provides essential data for air pollution control and environmental policy optimization in the Urumqi,Changji Hui Autonomous Prefecture,and Shihezi urban ag-glomeration,contributing to regional ecological protection and sustainable economic development.关键词
PM2.5与PM10/"乌-昌-石"城市群/时空变化/潜在源解析Key words
PM2.5 and PM10/Urumqi,Changji Hui Autonomous Prefecture,and Shihezi urban agglomeration/spatiotemporal variations/potential source apportionment引用本文复制引用
闫劲烨,马正权,孙萱萱,阿力木·阿巴斯,帕丽达·牙合甫..2015-2023年"乌-昌-石"城市群PM2.5与PM10时空变化及潜在源分析[J].干旱区地理,2025,48(3):405-420,16.基金项目
国家自然科学基金项目(21966029,21567028)资助 （21966029,21567028）
