Host: Japan Society of Hydrology and Water Resources
This study deals with the spatial and temporal changes in the composition of oxygen and hydrogen stable isotopes of precipitation on two small Japanese islands. In Miyake Island, seasonal changes in the isotopic composition plotted on a δ-diagram exhibit a distorted circle in the counterclockwise direction. Due to the detection of a similar trend in Tokyo, it is suggested that both areas are under the same air mass. In contrast, a small seasonal change was observed in Hachijo Island; inflow of a different vapor mass on the island is suggested.
