Abstract
Microphotographs of rimed snow crystals were analyzed and the riming properties were studied. The onset size of riming on snow crystals and the cutoff diameter of droplets accreted on snow crystals were obtained. It was apparent that when the snow crystals were larger, the riming in the same type of snow crystals was more favorable. It is considered that this is not related to their collection efficiency, but originates from their falling distance. It was shown that it may be possible to estimate the droplet size distribution in cloud, if rimed snow crystals of various types and various sizes are observed simultaneously.
