On the Dencity of Snow on the Ground

[摘要] Since Japanese Islands are stretched to a wide extent from southwest to northeast, from the tropical region to 50°N. of latitude, we can meet with various samples of snow. The author studied the corre_??_ation between the density of snow and the air temperature and humidity observed when snow is falling at Takata in Japan. From the results of 80 observations he found that the density of snow increases with the increase of temperature and with the decrease of humidity. When the air temperature is below the freezing point, the density (ratio of the depth of melted water to the original depth of snow on the ground) is about 0.09-0.10, but when the temperature is above that point, the density gradually increases with it. On one occasion a density amounting to 0.496 was measured. He concludes that the variety of snow may be conveniently classified with regard to the temperature and humidity prevailing at the time of fall.

[学科分类] 大气科学