Dataset for "Pollution-Clearing Induced Fog Suppression Even Under Extremely Humid Conditions Over North China Plain"

This dataset contains all observational and processed data used in the study titled “Pollution-Clearing Induced Fog Suppression Even Under Extremely Humid Conditions Over North China Plain”. The repository includes:(1) Hourly meteorological observations (visibility, RH, temperature, weather codes) from three airport stations (2013–2024).(2) Hourly PM2.5 mass concentration data obtained from the China National Environmental Monitoring Centre (CNEMC).(3) Long-term chemical composition measurements from the PKUERS station and the corresponding κ calculations. All datasets are provided in Excel format exactly as used for the analyses in the manuscript.