Recent Variation of Atmospheric Contents of C-14 in Tokyo and Transfer Problem of Atmospheric Carbon Dioxide

Abstract

This paper presents the variation of atmospheric carbon–14 concentration in Tokyo since the end of 1959. The observed results show big random fluctuation compared with those obtained by Fergusson (1963) at California. This fluctuation is discussed on the view of the nature of air mass on Honshu Island. Based on the variation of the tropospheric content of carbon–14 since 1955, the transport of carbon dioxide from the atmosphere into sea water is discussed using a parallelism between the supplies of carbon-14 and other radionuclides produced by nuclear tests from the stratosphere into the troposphere.