Quarterly Journal of the Royal Meteorological Society · 1963 · 89 citations · 4 references
Natural SciencesChemistryAir PollutionAtmospheric ChemistryAtmospheric ScienceAerosol ChemistryAerosol ScienceAerosol-cloud InteractionsAir QualityCloud Condensation NucleiCloud-aerosol InteractionsAerosol Chemical CompositionAerosol Cloud Condensation Nuclei ActivityAerosol-cloud-condensation Nuclei In FogSecondary Inorganic Aerosol FormationSulfate Aerosol ChemistrySulfate Aerosol FormationSulfate Formation In CloudsSurface Area
Abstract The rate of formation of ammonium sulphate in water drops exposed to air containing known concentrations of gaseous sulphur dioxide and ammonia has been measured. The mass of sulphate formed is proportional to the product of the surface area of the drops and the time of exposure. Extrapolation of the laboratory results to the atmosphere suggests that the large condensation nuclei 0·2 μ < r < 1 μ of ammonium sulphate, found by Junge to be abundant in industrially polluted air, are formed by the absorption of SO 2 and NH 3 in cloud and fog droplets.
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