*Tomotaka Saruya¹, Atsushi Miyamoto², Shuji Fujita^1,3, Iizuka Yoshinori⁴, Hiroshi Ohno⁵, Akira Hori⁵, Wataru Shigeyama³, Motohiro Hirabayashi¹, Kumiko Goto-Azuma^1,3, Shun Tsutaki^1,3 (1.National Institute of Polar Research, 2.Institute for the Advancement of Graduate Education, Hokkaido University, Sapporo, 3.The Graduate University for Advanced Studies (SOKENDAI), 4.Institute of Low Temperature Science, Hokkaido University, 5.Kitami Institute of Technology)

*SAAYA HAMAMOTO¹, Ryu Uemura¹, Sumito Matoba², Kaoru Kawakami², Mahiro Sasage², Mai Matsumoto², Kei Yoshimura³, Atsushi Okazaki⁴, Yoshinori Iizuka² (1.Nagoya University, 2.Institite of Low Temperature Science, Hokkaido University, 3.Institute of Industrial Science, The University of Tokyo, 4.Hirosaki University)

*Saki Tsuboi¹, Sakiko Ishino¹, Kaoru Kawakami², Shohei Hattori³, Takuya Sagawa¹, Sumito Matoba⁴, Iizuka Yoshinori⁴ (1.Kanazawa University, 2.Graduate School of Environmental Science, Hokkaido University, 3.Nanjing University, 4.Institute of Low Temperature Science, Hokkaido University)

Mahiro Sasage^2,1, *Iizuka Yoshinori¹, Kaoru Kawakami¹, Mai Matsumoto^2,1, Sumito Matoba¹, Shuji Fujita³ (1.Institite of Low Temperature Science, Hokkaido University, 2.Faculty of Environmental Science, Hokkaido University, 3.National Institute of Polar Research)

*Riko Yagihashi¹, Kazuho Horiuchi¹, Kohsei Yoshioka², Iizuka Yoshinori³, Sumito Matoba³, Kaoru Kawakami^3,4, Sakiko Ishino⁵, Mahiro Sasage^3,4, Mai Matsumoto^3,4, Takeyasu Yamagata⁶, Hiroyuki Matsuzaki⁶ (1.Graduate School of Science and Technology, Hirosaki University, 2.Faculty of Science and Technology, Hirosaki University, 3.Institute of Low Temperature Science, Hokkaido University, 4.Graduate School of Environmental Science, Hokkaido University, 5.Institute of Nature and Environmental Technology, Kanazawa University, 6.Micro Analysis Laboratory, Tandem accelerator (MALT), The University of Tokyo)