Cloud droplet activation and surface tension of mixtures of slightly soluble organics and inorganic salt

[摘要] Critical supersaturations for internally mixed particles of adipicacid, succinic acid and sodium chloride were determinedexperimentally for dry particles sizes in the range40-130nm. Surface tensions of aqueous solutions of thedicarboxylic acids and sodium chloride corresponding toconcentrations at activation were measured and parameterized as afunction of carbon content. The activation of solid particles aswell as solution droplets were studied and particle phase wasfound to be important for the critical supersaturation.Experimental data were modelled using Köhler theory modified toaccount for limited solubility and surface tension lowering.

[学科分类] 大气科学