11:00 AM - 11:30 AM
*Kaoru SATO1, Masaki TSUTSUMI2, Toru SATO3, Takuji NAKAMURA2, Akinori SAITO3, Yoshihiro TOMIKAWA2, Koji NISHIMURA2, Masashi KOHMA1, Hisao YAMAGISHI2, Takashi YAMANOUCHI2 (1.Dept Earth & Planetary Sci., The University of Tokyo, 2.National Institute of Polar Research, 3.Kyoto University)