4:45 PM - 5:00 PM
*Ryosuke Fukuchi1, Ken Sawada1,2, Hiroyasu Asahi1, Nozomi Hatano3 (1.Graduate School of Science, Hokkaido University, 2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 3.Natural Environment Division, Nagano Environmental Conservation Research Institute)