*Chihiro Miyamoto¹, Yoshinori Iizuka², Kohei Sakata³, Yoshio Takahashi¹ (1.Department of Earth and Planetary Science, Department of Science, The University of Tokyo, 2.Institute of Low Temperature Science, Hokkaido University, 3.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University)

*Fahmida Parvin¹, Osamu Seki¹, Yoshinori Iizuka¹, Sumito Matoba¹, Ken Sawada² (1.Intitute of Low Temperature Science, Hokkaido University, 2.Faculty of Science, Hokkaido University)

*Shohei Hattori¹, Asuka Tsuruta¹, Iizuka Yoshinori², Ryu Uemura³, Sumito Matoba², Naohiro Yoshida¹ (1.Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2.Institute of Low Temperature Science, Hokkaido University, 3.University of Ryukyus)

Ryoto Furukawa¹, *Ryu Uemura², Koji Fujita³, Jesper Sjolte⁴, Kei Yoshimura⁵, Sumito Matoba¹, Iizuka Yoshinori¹ (1.Institite of Low Temperature Science, Hokkaido University, 2.Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 3.Graduate School of Environmental Studies, Nagoya University, 4.Department of Geology, Quaternary Science, Lund University, 5.Institute of Industrial Science, the University of Tokyo)

*Iizuka Yoshinori¹, Koji Fujita², Shohei Hattori³, Ryu Uemura⁴, Osamu Seki¹, Chihiro Miyamoto⁵, Toshitaka Suzuki⁶, Naohiro Yoshida^3,7, Hideaki Motoyama⁸, Sumito Matoba¹ (1.Institite of Low Temperature Science, Hokkaido University, 2.Graduate School of Environmental Studies, Nagoya University, 3.Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4.Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 5.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 6.Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University, 7.Earth-Life Science Institute, Tokyo Institute of Technology, 8.National Institute of Polar Research)

Ryoto Furukawa¹, *Ryu Uemura², Koji Fujita³, Jesper Sjolte⁴, Kei Yoshimura⁵, Sumito Matoba¹, Iizuka Yoshinori¹ (1.Institite of Low Temperature Science, Hokkaido University, 2.Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 3.Graduate School of Environmental Studies, Nagoya University, 4.Department of Geology, Quaternary Science, Lund University, 5.Institute of Industrial Science, the University of Tokyo)

*Iizuka Yoshinori¹, Koji Fujita², Shohei Hattori³, Ryu Uemura⁴, Osamu Seki¹, Chihiro Miyamoto⁵, Toshitaka Suzuki⁶, Naohiro Yoshida^3,7, Hideaki Motoyama⁸, Sumito Matoba¹ (1.Institite of Low Temperature Science, Hokkaido University, 2.Graduate School of Environmental Studies, Nagoya University, 3.Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4.Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, 5.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 6.Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University, 7.Earth-Life Science Institute, Tokyo Institute of Technology, 8.National Institute of Polar Research)

*Kenji Kawamura^1,2,3, Shin Sugiyama⁴, Ryu Uemura⁶, Hideaki Motoyama^1,2, Takanobu Sawagaki⁵, Iizuka Yoshinori⁴, Kazuho Horiuchi⁷, Shuji Aoki⁸, Kumiko Goto-Azuma^1,2, Shuji Fujita^1,2, Osamu Seki⁴, Motohiro Hirabayashi¹, Ikumi Oyabu¹ (1.National Institute of Polar Research, Research Organization of Information and Systems, 2.SOKENDAI, 3.JAMSTEC, 4.Hokkaido University, 5.Hosei University, 6.University of Ryukyus, 7.Hirosaki University, 8.Tohoku University)

*Naohiko Hirasawa¹, Teruo Aoki², Masahiko Hayashi³, Koji Fujita⁴, Yoshinori Iizuka⁵, Naoyuki Kurita⁴, Hideaki Motoyama¹, Takashi Yamanouchi¹, Tetsuo Sueyoshi¹ (1.National Institute of Polar Research, 2.Okayama University, 3.Fukuoka University, 4.Nagoya University, 5.Hokkaido University)

*Naohiko Hirasawa¹, Teruo Aoki², Masahiko Hayashi³, Koji Fujita⁴, Yoshinori Iizuka⁵, Naoyuki Kurita⁴, Hideaki Motoyama¹, Takashi Yamanouchi¹, Tetsuo Sueyoshi¹ (1.National Institute of Polar Research, 2.Okayama University, 3.Fukuoka University, 4.Nagoya University, 5.Hokkaido University)