In order to understand the chemical composition and temporal variation characteristics of water-soluble anions in atmospheric dry deposition in Yuci District,Shanxi Province,atmospheric dry deposition samples from April 2022 to March 2023 in Yuci District were collected.The chemical characteristics and sources of water-soluble ions in dry deposition were discussed by correlation analysis and HYSPLIT backward trajectory model.The results show that the monthly average concentration of water-soluble anions in dry deposition in Yuci District is 846.158μg/g,the daily average flux is 589.7μmol/(m2·d),and the seasonal variation is winter>autumn>spring>summer.PM2.5/PM10 and NO2/SO2 support the contribution rate of fugitive dust and coal combustion to environmental pollution and ion concentration in Yuci District,and the concentration change of dry deposition anion is affected by precipitation and local air mass.
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