干旱区地理2024，Vol.47Issue(4)：707-719,13.DOI:10.12118/j.issn.1000-6060.2023.088
黄河流域五大城市群PM2.5时空演变与影响因素探讨
Spatiotemporal evolution and influencing factors of PM2.5 in the five urban agglomerations in the Yellow River Basin
摘要
Abstract
This study focuses on 82 cities in five major urban agglomerations in the Yellow River Basin and uses PM2.5 data published by the China National Environmental Monitoring Centre from 2016 to 2020.Spatial autocor-relation,geographic detectors,and geographically weighted regression methods were employed to investigate the spatiotemporal distribution characteristics and main driving factors of spatial heterogeneity of PM2.5.This pro-vides a reference for relevant departments to improve atmospheric pollution prevention and control policies.The results are as follows:(1)The change in the annual mean of PM2.5 roughly follows an inverted"N"shape,and the seasonal mean changes in a"U"shape with a periodicity of first decreasing and then increasing.(2)In terms of spatial distribution,a gradient-decreasing pattern is formed from downstream to midstream to upstream of the Yel-low River,exhibiting a gradually decreasing trend.(3)PM2.5 exhibits positive spatial autocorrelation and overall aggregation distribution over the five years,with high-high,low-low,and low-high agglomeration types.(4)Natu-ral geographical factors have a stronger driving force on PM2.5 spatial differentiation than socio-economic factors in 2016 and 2020.The interaction results show two types:bi-factor and nonlinear strengthening.(5)The geo-graphically weighted regression model is used to fit the five factors with the largest explanatory power for differ-entiation.The negative effects of each factor on PM2.5 pollution in the five urban agglomerations have increased,whereas the positive effects have decreased over the past 5 years.Significant differences in spatial direction and strength were observed.关键词
黄河流域/PM2.5/城市群/生态保护/高质量发展Key words
the Yellow River Basin/PM2.5/urban agglomeration/ecological protection/high-quality develop-ment引用本文复制引用
慕石雷,杨玉欢,乌日陶克套胡..黄河流域五大城市群PM2.5时空演变与影响因素探讨[J].干旱区地理,2024,47(4):707-719,13.基金项目
国家社会科学基金项目(20XMZ060) （20XMZ060）
内蒙古自治区2023年研究生科研创新项目(B20231052Z) （B20231052Z）
内蒙古师范大学基本科研业务费专项资金资助(2022JBXC010) （2022JBXC010）
