9:45 AM - 10:00 AM
*Makoto Okada1, Yuki Haneda2, Yusuke Suganuma3,4 (1.Department of Earth Sciences, Faculty of Science, Ibaraki University, 2.Graduate School of Scinece and Engineering, Ibaraki Univeristy, 3.National Institute of Polar Research, 4.Graduate University for Advanced Studies)