塩害に関する基礎的研究(第三報) 海塩粒子の三次元分布の解析

Abstract

Observations of the three-dimensional distribution of giant sea-salt particles werecarried out from an airplane, and at stations distributed on the ground, over the centraland northern parts of Kinki district, Japan, on August 10, 1967. The observations weremade in the morning and in the afternoon. The meteorological conditions in the afternoonwere suitable for the application of our theoretical model to the analysis of the data.The afternoon observation showed that the particle concentration had a maximum valueat about 300 in level over Kyoto, and the particle concentration decreased rapidly withdecreasing height down to one order smaller values near the ground surface, as expectedfrom our theoretical model. The impaction-sedimentation ratio, r~ estimated from theobserved vertical distribution, was about 10 to 30.