Vapor diffusional growth of free-falling snow crystals between –3 and –23°C

Abstract

The characteristics of snow crystal growth by vapor diffusion at water saturation and in free fall were quantitatively investigated in a vertical supercooled cloud tunnel for periods up to 30 min at temperatures from –3 to –23°C. The results obtained are as follows: 1) the basic growth habits were plates (>–4.0 ºC), columns (–4.0––8.1 °C), plates (–8.1––22.4 °C) and columns (