*Takahiro Suzuki¹, Takuto Ando¹, Shun Chiyonobu¹, Takeshi Hayashi², Hiroto Kajita³ (1.Graduate School of International Resource Sciences, 2.Faculty of Education and Human Studies, Akita Univ., 3.Faculty of Science and Technology, Hirosaki University)

*Atsuki Nagata¹, Hiroto Kajita², Hirofumi Tazoe³, Junpei Abo², Hinano Kusunose², Takuto Ando⁴, Takahiro Suzuki⁴, Masahiro Minowa⁵, Iroha Ono⁶, Hitoshi Hasegawa⁶, Aki Sakuma⁷, Asuka Yamaguchi⁸, Yoshiaki Suzuki⁹, Koji Umeda² (1.Graduate school of Sustainable Community Studies, Hirosaki University, 2.Graduate school of Science and Technology, Hirosaki University, 3.Institute of Radiation Emergency Medicine, Hirosaki University, 4.Graduate School of International Resource Sciences, Akita University, 5.Institute of Low Temperature Science, Hokkaido University, 6.Faculty of Science and Technology, Kochi University, 7.Department of Earth and Planetary Science, School of Science, the University of Tokyo, 8.Atomosphere and Ocean Research Institute, The University of Tokyo, 9.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

*Yuki Haneda¹, Riku Nakagawa^2,3, Hiroto Kajita², Masayuki Utsunomiya¹, Yusuke Suganuma⁴, Motohiro Hirabayashi⁴, Hiroyuki Matsuzaki⁵, Takeyasu Yamagata⁵, Daisuke Kuwano⁶, Yoshimi Kubota⁷, Makoto Okada⁸ (1.Geological Survey of Japan, AIST, 2.Hirosaki University, 3.Shizuoka Prefectural Government, 4.National Institute of Polar Research, 5.The University Museum, The University of Tokyo, 6.Kyoto University, 7.National Museum of Nature and Science, 8.Ibaraki University)

*Daisuke Kuwano¹, Nakagawa Riku^2,3, Hiroto Kajita², Yuki Haneda⁴, Masayuki Utsunomiya⁴, Yoshimi Kubota⁵, Yusuke Suganuma⁶, Makoto Okada⁷ (1.Kyoto University, 2.Hirosaki Univeristy, 3.Shizuoka Prefectural Government, 4.National Institute of Advanced Industrial Science and Technology, 5.National Museum of Nature and Science, 6.National Institute of Polar Research, 7.Ibaraki University)