Abstract
In-situ sampling of clouds with a droplet to aerosol converter allows determination of several important chemical and physical properties of cloud droplets over short spatial and temporal scales. During a measurement programme in July and August 1986 on the Swedish peak Areskutan (1250 m asl), the number concentration, water content, and aerosol light scattering coefficient of evaporated cloud droplets were determined in-situ. These measurements allow estimation of the mass concentration of non-volatile materials dissolved or suspended in the cloud droplets, the average size of the sampled cloud droplets, and the average size of the aerosol particles that result from evaporation of the sampled cloud droplets. The results illustrate the inhomogeneous character of clouds, with substantial variations of droplet number concentration, liquid water content, and residual aerosol light scattering coefficient over distances of less than 1 km. The observed, smaller variations in derived properties such as aqueousphase mass concentration and mean droplet radius may be due to entrainment of subsaturated air causing complete evaporation of some of the droplets.
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© 1988 Kluwer Academic publishers
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Ogren, J.A. et al. (1988). Measurements of the Short-Term Variability of Aqueous-Phase Mass Concentrations in Cloud Droplets. In: Unsworth, M.H., Fowler, D. (eds) Acid Deposition at High Elevation Sites. NATO ASI Series, vol 252. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3079-7_6
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DOI: https://doi.org/10.1007/978-94-009-3079-7_6
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