11:00 AM - 1:00 PM
*Shingo Sugawara1, Wataru Fujiya1, Hiroyuki Kagi2, Akira Yamaguchi3, Ko Hashizume1 (1.Graduate School of Science and Engineering, Ibaraki University , 2.Geochemical Research Center, Graduate School of Science, The University of Tokyo, 3.National Institute of Polar Research)