*Satoru MIURA¹, Michio AOYAMA², Eriko ITO³, Koji SHICHI³, Daisuke TAKATA¹, Masaya MASUMORI¹, Nobuhito SEKIYA¹, Natsuko I. KOBAYASHI¹, Naoto TAKANO⁴, Shinji KANEKO³, Keitaro TANOI¹, Tomoko M. NAKANISHI¹ (1.The University of Tokyo, 2.Fukushima University, 3.Forestry and Forest Products Res. Inst., 4.Scarabs Corporation)

*Yuichiro KUMAMOTO¹, Masatoshi YAMADA², Michio AOYAMA³, Yasunori HAMAJIMA⁴, Akihiko MURATA¹, Takeshi KAWANO¹ (1.JAMSTEC, 2.Hirosaki University, 3.Fukushima University, 4.Kanazawa University)

*Yayoi INOMATA¹, Michio AOYAMA², Takaki TSUBONO³, Daisuke TSUMUNE³, Katsumi HIROSE⁴ (1.Asia Center for Air Pollution Research, 2.Fukushima University, 3.Central Research Institute of Electric Power Industry, 4.Sophia University)

*Michio AOYAMA¹, Yasunori HAMAJIMA², Mikael Hult³, Mitsuo UEMATSU⁴, Eitarou OKA⁴, Daisuke TSUMUNE⁵, Yuichiro KUMAMOTO⁶ (1.Institute of Environmental Radioactivity, Fukushima University, 2.Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa Unive, 3.European Commission, Joint Research Centre, Institute for Reference Materials and Measurements (IRMM, 4.Center for International Collaboration ,Atmosphere and Ocean Research Institute, The University of T, 5.Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, 6.Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology)