On Raindrop-size Distribution in Warm Rain (I)

The raindrop data obtained at three stations 3.4,2.1 and 1.3 km above sea level (a.s.l.) along the Mt. Fuji slope were evidently under a warm rain situation, and compared with those at Hawaii (FUJIWARA,1967). The comparison resulted in good agreement in that the spectra are very narrow with extremely high concentrations and that accordingly both parameters B and β in Z-R relationship are excessively small. Although with the Hawaiian data a tendency was found that the mean values of both parameters decreased with height, since the topographical slope was gentle (about 3/100), some doubt remained as to whether this tendency is due to the height or to the horizontal distance. This doubt is almost removed by the present result for which the network extended vertically and horizontally to a comparable order of distance (about 1/2 of slope).