KeywordsPenning ionization; hydrogenated molecules; metastable rare gas atoms; planetary atmospheres; mass spectrometry; electron spectroscopy; crossed molecular beams; acid precipitation; nitrate; precipitation; sulfate; Korea; pH; aircraft measurements of aerosol microphysical, chemical, and optical components and ambient relative humidity; Ultra-High Sensitivity Aerosol Spectrometer (UHSAS); Passive Cavity Aerosol Spectrometer (PCASP); Cloud and Aerosol Spectrometer (CAS); Aerosol Mass Spectrometer (AMS); Single Particle Soot Photometer (SP2); integrating nephelometer; humidification system; Two-Column Aerosol Project (TCAP); visibility; air pollutants; meteorological parameters; principal component analysis; generalized regression model; particulate; urban aerosols; Saudi Arabia; sand; scanning electron microscopy; Mount Wutai Buddhism scenic spot; PM10; PM2.5; single-particle morphology; element characteristics; PAHs; PM2.5; Cuernavaca; diagnostic ratios; ambient observations; air quality; photochemistry; atomic chlorine; molecular chlorine; nitryl chloride; marine aerosol; organics; stratocumulus clouds; cloud condensation nuclei; polycyclic aromatic hydrocarbons (PAHs); sandstorm; emission sources; long-range transport; Mount Heng; free troposphere; forest fires; urban ozone; pollutants; Santiago of Chile; aerosol; dust; IMPROVE; Asian dust; Arizona; air quality; extreme events; dust transport; mine tailings; forecasting; dust collection; arsenic and lead; aerosol variations; southwest US; multi-satellite analysis; North American monsoon; atmospheric aerosols; road dust resuspension; enrichment factor; urban road dust profile; pavement resuspension
