*Kaoru Kawakami¹, Yoshinori Iizuka¹, Mahiro Sasage^1,2, Mai Matsumoto^1,2, Takeshi Saito¹, Akira Hori³, Sakiko Ishino⁴, Shuji Fujita^5,6, Koji Fujita⁷, Keita Takasugi³, Takumi Hatakeyama⁸, Saaya Hamamoto⁷, Akihisa Watari, Nao Esashi⁷, Miu Otsuka, Ryu Uemura⁷, Kazuho Horiuchi⁸, Masahiro Minowa¹, Shohei Hattori⁹, Teruo Aoki^5,6, Motohiro Hirabayashi⁵, Kenji Kawamura^5,6,10, Sumito Matoba¹ (1.Institute of Low Temperature Science, Hokkaido University,, 2.Graduate School of Environmental Science, Hokkaido University, 3.Kitami Institute of Technology, 4.Institute of Nature and Environmental Technology, Kanazawa University, 5.National Institute of Polar Research, 6.Department of Polar Science, The Graduate University of Advanced Studies, SOKENDAI, 7.Graduate School of Environmental Studies, Nagoya University, 8.Graduate School of Science and Technology, Hirosaki University, 9.International Center for Isotope Effects Research, School of Earth Sciences and Engineering, Nanjing University, 10.Japan Agency for Marine Science and 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)

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)