The Decreasing Action of Dissolved Gases on the Density of Lake-waters

Abstract

1) The changes of the densities of the waters from Lake Takasukanuma, which were caused by the dissolution of gases, have been calculated from the data of gas-analysis of the waters (Table 1) and the ÅNGSTRÖM'S coefficients of dilatation by absorption (Table 2), using HORIITPI's equation of density-change by absorption.
2) The results show that,
a) Except carbon dioxide, all kinds of dissolved gases are distributed in such a way that deeper lying waters tend to become lighter than upper lying ones. So the total decrease of density due to the dissolved gases and the gradient of its vertical change become larger as it goes deeper, while they attain their maximum in October 20th and become smaller as time advances.
b) Parallelism is evident when we compare these results with the data of the measurement of the densities of waters, which were reported in my previous paper (1).
3) Thus the decrease of density in the deepest water reported is explained partly by the dissolution of gases. But, as the amount of decrease due to the dissolved gases does not exceed 10% of the total decrease, the full explanation is hoped to be obtained along some other lines. Studies are being continued further along them.