ICE NUCLEATION BY AEROSOL PARTICLES: EXPERIMENTAL STUDIES USING A WEDGE-SHAPED ICE THERMAL DIFFUSION CHAMBER.

Abstract

The principle and feasibility of a new wedge-shaped ice thermal diffusion chamber are demonstrated and the method of estimating the supersaturation in the chamber is shown. Ice nucleation studies were carried out using the chamber and relatively large aerosol particles freely suspended in air. In the studies, the temperature and the supersaturation were independently controlled without substrate. All natural and artificial, organic and inorganic nuclei studied exhibited condensation-freezing as well as deposition modes of ice formation. Conditions for their occurrence and modes of their activation were identified.