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Choi, Y. ., Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, choiy@jamstec.go.jp
Kida, S. ., Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, kidas@jamstec.go.jp
Takahashi, K. ., Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan, takahasi@jamstec.go.jp

THE DISPERSION OF RADIOACTIVE WATER RELEASED FROM THE FUKUSHIMA DAIICHI NUCLEAR POWER-PLANTS

We use a numerical model to investigate the dispersion of radioactive water released from the Fukushima Daiichi Nuclear Power-plants (FDNP) on March 2011. The numerical model is based on a three dimensional particle random-walk model and a z-coordinate ocean general circulation model developed at the Earth Simulator Center, JAMSTEC. Radionuclide concentrations are obtained from the density of particles per unit volume water. Experiments have been carried out for 137Cs for 4 months and the results show that coastal currents and meso-scale open oceanic eddies having large influence on the behavior of the radionuclides. The radionuclides in coastal currents remain along the coast where as the one in meso-scale open oceanic eddies rapidly escape to the interior of the Pacific along the Kuroshio extension. The seaward radionuclides deeply penetrate into the deep layer corresponding to the deepening of the mixed layer of the Kuroshio.

Poster presentation

Session #:088
Date: 2/21/2012
Time: 10:30 - 16:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: B1007