郑州大学学报（工学版）2024，Vol.45Issue(3)：29-37,9.DOI:10.13705/j.issn.1671-6833.2024.03.014
黄河流域气溶胶时空异质性及影响因素分析
Spatio-temporal Heterogeneity and Driving Factors of AOD in the Yellow River Basin
摘要
Abstract
Studies on the long-term aerosol optical depth(AOD)based on the large-scale Yellow River basin was limited,and most of them only focused on meteorological conditions.In this study,the MODIS aerosol optical depth(AOD)products was collected,and then the temporal and spatial pattern of AOD and comprehensively quan-tified the impact of geographical environment,natural weather and social economy on AOD in the Yellow River Ba-sin were analyzed based on the geographically weighted regression(GWR).The results showed that the AOD ex-hibited a downward trend in the Yellow River Basin.The AOD value decreased from 0.38 in 2001 to 0.22 in 2022.Moreover,the distribution of AOD also showed obvious seasonal differences that AOD values in spring and summer were higher than in autumn and winter.This wight be the result of a combination of factors such as temperature,at-mospheric diffusion conditions,and vegetation cover.From the perspective of spatial distribution,the AOD in the study area gradually increased from west to east.This trend was opposite to the distribution of DEM in the Yellow River Basin,indicating a close correlation between terrain and aerosols.The analysis of influencing factors based on GWR model showed that,for the entire Yellow River Basin,terrain and vegetation had the greatest impact on AOD in the Yellow River Basin,followed by socio-economic factors and natural meteorology.Prominent cities in the Yellow River Basin were also analyzed in the study,and the results showed that the inter-annual variation of AOD in different cities in the study area was quite different.The AOD values of Xining,Yinchuan and Baotou in the upper reaches of the Yellow River Basin showed a low level,with the highest value appearing in winter and the lowest val-ue appearing in summer,while the AOD values of cities in the middle and lower reaches were the highest in summer and the lowest in winter.关键词
MODIS/气溶胶光学厚度/时空分布/影响因素/黄河流域Key words
MODIS/AOD/spatio-temporal pattern/influencing factors/the Yellow River Basin分类
资源环境引用本文复制引用
李健,全智雯,周书贵,马玉荣..黄河流域气溶胶时空异质性及影响因素分析[J].郑州大学学报（工学版）,2024,45(3):29-37,9.基金项目
国家自然科学基金资助项目(42201370) （42201370）
