*Yuichi Kurihara¹, Hikaru Miura¹, Toshihiro Kogure¹, Noriko Yamaguchi², Shogo Higaki³, Aya Sakaguchi⁴, Yuichi Onda⁵, Masayoshi Yamamoto⁶, Kazuya Tanaka⁷, Jota Kanda⁸, Takashi Ishimaru⁸, Yoshio Takahashi¹ (1.Department of Earth and Planetary Science, Graduate School of Science, The university of Tokyo, 2.National Institute for Agro-Environmental Sciences, 3.Radioisotope Center, The university of Tokyo, 4.Faculty of Pure and Applied Science, University of Tsukuba, 5.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 6.Low Level Radioactivity Laboratory, Kanazawa University, 7.Japan Atomic Energy Agency, 8.Tokyo University of Marine Science and Technology)

*Yasuhito Igarashi¹, Mizuo Kajino¹, Masamitsu Hayasaki², Kouji Adachi¹, Yuji Zaizen³, Thomas Sekiyama¹ (1.Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute, 2.Center for Regional Environmental Research, National Institute for Environmental Studies , 3.Forecast Research Department, Meteorological Research Institute)

Shuntaro Kinno¹, *Hiroshi Okochi¹, Hiroto Kuroshima¹, Naoya KATSUMI¹, Hiroko Ogata¹, Jun Kataoka², Aya KISHIMOTO², Yasuhiro IWAMOTO², Atsuyuki SORIMACHI³, Shinji TOKONAMI⁴ (1.School of Science and Engineering, Waseda University,, 2.School of Advanced Science and Engineering, Waseda University, 3. School of Medicine, Fukushima Medical University, 4.Institute of Radiation Emergency Medicine, Hirosaki University )

*Toshiro Yamaguchi¹, Yuichi Onda¹, Hiroaki Kato¹ (1.Center for Research Isotopes and Environmental Dynamics, University of Tsukuba)

*Sho Iwagami¹, Maki Tsujimura², Yuichi Onda¹, Koichi Sakakibara², Yutaro Sato², Kosuke Nagano² (1.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 2.Graduate School of Life and Environmental Sciences, University of Tsukuba)

*XIANG GAO¹, Yuichi Onda², Keisuke Taniguchi³ (1.Master's Program in Environmental Sciences,University of Tsukuba , 2.Center for Research on Isotopes and Environmental Dynamics,University of Tsukuba, 3.Centre for Environmental Creation Fukushima Prefecture)

*Miho Fukuda¹, Shinnosuke Yamazaki¹, Tatsuo Aono¹, Takashi Ishimaru², Jota Kanda² (1.National Institute for Quantum and Radiological Science and Technology, National Institute of Radiological Science, 2.Tokyo University of Marine Science and Technology)

*Yuichiro Kumamoto¹, Michio Aoyama², Yasunori Hamajima³, Eitrou Oka⁴, Akihiko Murata¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Fukushima University, 3.Kanazawa University, 4.University of Tokyo)

*Yayoi Inomata¹, Michio Aoyama², Takaki Tsubono³, Daisuke Tsumune³, Masatoshi Yamada⁴ (1.Kanazawa University, Institute of Nature and Environmental Technology, 2.Fukushima University, Institute of Environmental Radioactivity, 3.Central Research Institute of Electric Power Industry, 4.Hirosaki University, Institute of radiation emergency medicine)