*Yu Hoshina¹, Yasunori Tohjima¹, Yukio Terao¹, Keiichi Katsumata¹, Hitoshi Mukai¹, Toshinobu Machida¹, Yumi Osonoi¹ (1.National Institute for Environmental Studies)

*Shuji Fujita^1,2, Kumiko Goto-Azuma^1,2, Hiroyuki Enomoto^1,2,3, Kotaro FUKUI^1,7, Motohiro Hirabayashi¹, Akira Hori³, Yu Hoshina^4,8, Yoshinori Iizuka⁵, Yuko MOTIZUKI⁶, Hideaki Motoyama^1,2, Fumio Nakazawa¹, Shin Sugiyama⁵, Sylviane Surdyk¹, Kazuya Takahashi⁶ (1.National Institute of Polar Research, Research Organization of Information and Systems(ROIS), 2.Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI), 3.Kitami Institute of Technology, 4.Nagoya University, 5.Institute of Low Temperature Science, Hokkaido University, 6.RIKEN, 7.Now at: Takteyama Caldera Sabo Museum, 8.Now at: National Institute for Environmental Studies Center for Global Environmental Research)