4:22 PM - 4:37 PM
*Yuki Hattori1, Ken Sawada2, Takuto Ando3, Hideto Nakamura4, Kotaro Hirose5 (1.Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 3.Arctic Research Center, Hokkaido University, 4.Faculty of Science, Osaka City University, 5.Faculty of Science & Engineering, Waseda University)