Abstract
The variation in tritium concentration in atmospheric moisture was measured in Tokyo in May 1966 and July 1968. This paper presents a detail of experimental procedures and a discussion on the correlation between the variation in tritium concentration and the nature of air masses. The observed results showed fairly good correlation between weather development and tritium concentration. Tritium concentration in moisture was high, when the continental air mass was located above Tokyo, and low, when the oceanic air mass was located. This method is available to analysis of air mass.
