*Kaoru Kawakami^1,2, Yoshinori Iizuka², Akira Hori³, Sakiko Ishino⁴, Mahiro Sasage^1,2, Mai Matsumoto^1,2, Keita Takasugi³, Takeshi Saito², Sumito Matoba², Shohei Hattori⁵ (1.Graduate school of Environmental Science, Hokkaido University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Kitami Institute of Technology, 4.Institute of Nature and Environmental Technology, Kanazawa University, 5.International Center for Isotope Effects Research, Nanjing University)

*Mahiro Sasage^1,2, Iizuka Yoshinori², Shuji Fujita^3,4, Kaoru Kawakami^1,2, Takeshi Saito², Mai Matsumoto^1,2, Keita Takasugi⁵, Sumito Matoba², Akira Hori⁵, Sakiko Ishino⁶, Shohei Hattori⁷ (1.Graduate School of Environmental Science, Hokkaido University, 2.Institute of Low Temperature Science, Hokkaido University, 3.National Institute of Polar Research, Research Organization of Information and Systems (ROIS), 4.Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI), 5.Kitami institute of Technology, 6.Institute of Nature and Environmental Technology, Kanazawa University, 7.Nanjing University)

*Shohei Hattori¹ (1.Nanjing University, International Center for Isotope Effects Research)