Observation of radiocesium in seabed soil at the Notsuke Strait of the southern Okhotsk Sea derived from the Fukushima Daiichi Nuclear Power Plant

摘要

Seabed soils of the southern Okhotsk Sea at the Notsuke Strait, Hokkaido were collected, and the radioactivity was measured with a Ge semiconductor detector. Trace amount of radiocesium derived from the Fukushima Daiichi Nuclear Power Plant was detected. It was suggested by combining other results that this radiocesium was originally deposited in western Fukushima from the Fukushima Daiichi Nuclear Power Plant, and migrated to the Japan Sea with the Agano River, and then carried to the Notsuke Strait by Tsushima Warm Current and Soya Warm Current.