Japan Geoscience Union Meeting 2016

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Poster

Symbol M (Multidisciplinary and Interdisciplinary) » M-AG Applied Geosciences

[M-AG24] Dynamics of radionuclides emitted from Fukuchima Dai-ichi Nuclear Power Plant in the environment

Mon. May 23, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Kazuyuki Kita(Faculty of Science, Ibaraki University), Yuichi Onda(Center for Research on Isotopes and Environmental Dynamics, University of Tsukuba), Teruyuki Nakajima(Japan Aerospace Exploration Agency), Yasuhito Igarashi(Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute), Masatoshi Yamada(Institute of Radiation Emergency Medicine, Hirosaki University), Chisato Takenaka(Graduate School of Bioagricultural Sciences, Nagoya University), masayoshi yamamoto(Low Level Radioactivity Laboratory, Kanazawa University), Jota Kanda(Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology), Atsushi Shinohara(Osaka university)

5:15 PM - 6:30 PM

[MAG24-P05] Can we estimate vertical profile of radiation caused by deposited radioactive materials from atmospheric electric field measurement?

Masashi Kamogawa1, *Yuko Suzuki1, Yoshihisa Kimura1 (1.Department of Physics, Tokyo Gakugei University)

Keywords:Radiation, Atmospheric Electric Field, Conductivity

The 2011 off the Pacific coast of Tohoku Earthquake generated large tsunami resulting in serious damage to the Fukushima Daiichi nuclear power plant (FDNPP). The damage caused radioactive materials be discharged to the environment. After the discharge, transported radioactive materials were deposited around east Japan. The radioactive deposition modulated atmospheric electricity such as the decrease of atmospheric electric field (AEF) for several months. From the ground-based observations of AEF, detectable modulated area on the ground was estimated only within a few hundred kilometers from FDNPP. In addition, we estimate the modulated height above the ground by applying the observed data to a global electric circuit model, so that the modulated height was up to approximately 1 km, which agrees with aerial radiation monitoring. Therefore, the ground-based AEF observation might contribute to estimating the vertical profile of radiation.