11:45 AM - 12:00 PM
*Makoto Okada1, Hitomi Takizawa1, Yuki Haneda2, Yusuke Suganuma3,4, Quentin Simon5 (1.Department of Earth Sciences, College of Science, Ibaraki University, 2.Graduate school of Science and Technology, Ibaraki University, 3.National Institute of Polar Research, 4.Graduate University for Advanced Studies, 5.Aix-Marseille University)