Evaporation of fog Particles and the Relation between the Visibility and Fog Particles

[摘要] In summer of 1944 Observations of fog were done at Urakawa in Hokkaido. Results obtained are as follows:(1) Trabert's fcrmul_??_. on the relation between the visibility and fog particles holds only when the altitude of the sun, the height of fog etc. are the same and in different states the constant value in the formula has different value.(2) Fog particles become small as they invade into the inland and this can be explained as due to the high temperature of the air on the ground.(3) Often, fogs hecome thin during the rain fall owing to the capture of rain drops and this was ascertained quantitatively by experiment.(4) The rate of evaporation of a fog particle at rest is proportional to the square of its diameter.

[学科分类] 大气科学