广西科学2025，Vol.32Issue(1)：192-203,12.DOI:10.13656/j.cnki.gxkx.20250521.020
2015-2022年桂林PM2.5外来输送特征及潜在源分析
Transport Characterization and Potential Source Analysis of PM2.5 in Guilin from 2015 to 2022
摘要
Abstract
The spatiotemporal distribution characteristics and potential sources of PM2.5 in Guilin were ana-lyzed based on the data of PM2.5 mass concentrations and meteorological factors from 2015 to 2022.The Hy-brid Single Particle Lagrangian Integrated Trajectory(HYSPLIT)Model was employed to simulate back-ward trajectories of air masses in Guilin.The cluster trajectory analysis and Concentration-Weighted Trajec-tory method(CWT)were employed to explore the distribution of potential PM2.5 source areas and their con-tributions in different seasons.The results indicated that the PM2.5 pollution in Guilin showed a decreasing trend year by year,with the seasonal characteristics of PM2.5 transport pathways being a significant factor leading to the monthly variation pattern characterized by high in winter,low in summer,and moderate in spring and autumn.The pollutant transport from central China,Guangdong,and Guangxi was the main exter-nal source of PM2.5 in the urban area of Guilin.The unique geographical location and topographical factors of Guilin played a crucial role in the transport and diffusion of pollutants in this region.The mechanism of cross-regional pollution transmission and the coupling effect between local meteorology and topography are re-vealed,which can provide a scientific basis for regional joint prevention and control and precise pollution con-trol.关键词
PM2.5/时空分布/后向轨迹聚类/浓度权重轨迹分析法Key words
PM2.5/temporal and spatial distribution/backward trajectory clustering/Concentration-Weighted Trajectory(CWT)method分类
资源环境引用本文复制引用
叶子葳,王琛泉,文建辉,卢德林,林清钰,陈春强,霍强,龙腾发..2015-2022年桂林PM2.5外来输送特征及潜在源分析[J].广西科学,2025,32(1):192-203,12.基金项目
国家自然科学基金项目(51968007),广西自然科学基金项目(2018GXNSFAA294147)和珍稀濒危动植物生态与环境保护教育部重点实验室研究基金项目(ERESP2020Z15)资助. （51968007）
