Size Distribution of Giant Non-Hygroscopic Particles in Raindrops

[摘要] Individual raindrops were sampled at four stations in mountain area of Hokkaido in the summer of 1954 and 1955 and the size distribution of giant non-hygroscopic particles in the raindrops was studied. The results of observations are as follows.(1) The form of size distribution curve is independent of raindrop size and is expressed by a formula dN/dγ=const•γ-β, where γ is the radius of the particles. The value of β are between 1.7 and 3.2.(2) Particle content of raindrops is approximately the same at various stations and is invariable with time.(3) Particle content is roughly proportional to the cross-sectional area of raindrops except for the small raindrops of diameters less than 0.3mm.

[学科分类] 大气科学