*SAAYA HAMAMOTO¹, Kaoru Kawakami², Mahiro Sasage^2,3, Mai Matsumoto^2,3, Bong Hayoung⁶, Kei Yoshimura⁴, Atsushi Okazaki⁵, Sumito Matoba², Yoshinori Iizuka², Ryu Uemura¹ (1.Graduate School of Environmental Studies, Nagoya University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Graduate School of Environmental Science, Hokkaido University, 4.Atmosphere and Ocean Research Institute, The University of Tokyo, 5.Institute of Advanced Academic Research, Chiba University, 6.Institute of Industrial Science, The University of Tokyo)

*Mai Matsumoto^1,2, Yoshinori Iizuka², Teruo Aoki³, Satoru Adachi⁴, Tomotaka Saruya³, Akihiro Hachikubo⁵, Kaoru Kawakami², Takeshi Saito², Sumito Matoba², Shuji Fujita^3,6 (1.Graduate School of Environmental Science, Hokkaido University, 2.Institute of Low Temperature Science, Hokkaido University, 3.National Institute of Polar Research, 4.Snow and Ice Research Center, NIED, 5.Kitami institute of Technology, 6.The Graduate University for Advanced Studies, SOKENDAI)