Effects of CCN-FCN (Cloud Condensation Nuclei-Fog Condensation Nuclei) Spectra on Droplet Spectra in the Albany Fog Project

摘要

Analysis of aerosol and fog droplet data has shown that fogs are composed of zones with various supersaturations and subsaturation. A technique to quantify the subsaturations as well as the supersaturations has been developed. This has enable calculations to be made of droplet growth and evaporation of the droplet spectra. These preliminary approximations are consistent with the measured time evolutions of the fog. The largest nuclei (lowest critical supersaturation) FCN were definitely found to be the only ones upon which fog droplets condense. Droplet concentrations and visibility in subsaturated conditions especially were found to be determined by the preexisting nuclei. Droplet concentrations and visibility in supersaturated conditions were found to be related to the preexisting nuclei.