*Ikumi Oyabu¹, Kenji Kawamura^1,2,3, Tsutomu Uchida⁴, Shuji Fujita^1,2, Kyotaro Kitamura¹, Motohiro Hirabayashi¹, Jeffrey Severinghaus⁵, Morgan Jacob⁵ (1.National Institute of Polar Research, Research Organization of Information and Systems, 2.The Graduate University of Advanced Studies (SOKENDAI), 3.Japan Agency for Marine Science and Technology (JAMSTEC), 4.Hokkaido University, 5.Scripps Institution of Oceanography)

*Tomotaka Saruya¹, Shuji Fujita^1,2 (1.National Institute of Polar Research, 2.SOKENDAI (The Graduate University for Advanced Studies))

*Ayaka Yonekura¹, Kenji Kawamura^1,2,3, Ikumi Oyabu², Kyotaro Kitamura², Jun Ogata², Motohiro Hirabayashi², Kaori Fukuda², Yoshimi Tsukagawa², Tomotaka Saruya², Fumio Nakazawa^1,2, Shuji Fujita^1,2, Kumiko Goto-Azuma^1,2, Hideaki Motoyama^1,2 (1.The Graduate University for Advanced Studies, SOKENDAI, 2.National Insutitute of Polar Research, 3.JAMSTEC)

*Takashi Obase¹, Sam Sherriff-Tadano¹, Ayako Abe-Ouchi¹, Tristan Vadsaria¹, Christo Buizert² (1.Atmosphere and Ocean Research Institute, the University of Tokyo, 2.Oregon State University)

*Yuta Kuniyoshi¹, Ayako Abe-Ouchi¹, Sam Sherriff-Tadano², Wing-Le Chan¹, Fuyuki SAITO³ (1.The University of Tokyo, 2.University of Leeds, 3.JAMSTEC)

*Lynn Hirose¹, Ayako Abe-Ouchi¹, Wing-Le Chan¹ (1.the University of Tokyo)