On a Special Aspect of the Condensation Process and its Importance in the Treatment of Cloud Particle Growth

Available data on the rate of exchange of molecules between liquid water and vapour in contact with it are put in relation to atmospheric condensation and evaporation processes. It is shown that this exchange process excerts a quenching action on the rate of growth of small droplets that should contribute to the formation of a broad size spectrum. Surface films may enhance the effect considerably. Experimental data are needed to decide finally the meteorological significance of the effect.