*Takeshi KINASE¹, Kazuyuki KITA², Yutaka KONDO³, Syo OHATA³, Nobuhiro MOTEKI³, Kumiko AZUMA⁴, Yoshimi OGAWA⁴, Masataka SHIOBARA⁴, Hideaki MOTOYAMA⁴, Masahiko HAYASHI⁵, Keiichiro HARA⁵ (1.Graduate school of science and engineering of Ibaraki Univ., 2.Collage of science, Ibaraki Univ., 3.Scool of science the university of Tokyo, 4.National Institute of Polar Reserch, 5.Fukuoka Univ.)

*Takeshi KINASE¹, Kazuyuki KITA², Yutaka KONDO³, Syo OHATA³, Nobuhiro MOTEKI³, Kumiko AZUMA⁴, Yoshimi OGAWA⁴, Masataka SHIOBARA⁴, Hideaki MOTOYAMA⁴, Masahiko HAYASHI⁵, Keiichiro HARA⁵ (1.Graduate school of science and engineering of Ibaraki Univ., 2.Collage of science, Ibaraki Univ., 3.Scool of science the university of Tokyo, 4.National Institute of Polar Reserch, 5.Fukuoka Univ.)

*Masataka SHIOBARA¹, Masanori YABUKI², Makoto KUJI³, Toshiaki TAKANO⁴, Hajime OKAMOTO⁵ (1.National Institute of Polar Research, 2.Research Institute for Sustainable Humanosphere, 3.Division of Natural Sciences, Faculty, Nara Women's University, 4.Chiba University Graduate School of Engineering, 5.Kyushu University Research Institute for Applied Mechanics)