Mahiro Sasage^2,1, *Iizuka Yoshinori¹, Kaoru Kawakami¹, Mai Matsumoto^2,1, Sumito Matoba¹, Shuji Fujita³ (1.Institite of Low Temperature Science, Hokkaido University, 2.Faculty of Environmental Science, Hokkaido University, 3.National Institute of Polar Research)

*Riko Yagihashi¹, Kazuho Horiuchi¹, Kohsei Yoshioka², Iizuka Yoshinori³, Sumito Matoba³, Kaoru Kawakami^3,4, Sakiko Ishino⁵, Mahiro Sasage^3,4, Mai Matsumoto^3,4, Takeyasu Yamagata⁶, Hiroyuki Matsuzaki⁶ (1.Graduate School of Science and Technology, Hirosaki University, 2.Faculty of Science and Technology, Hirosaki University, 3.Institute of Low Temperature Science, Hokkaido University, 4.Graduate School of Environmental Science, Hokkaido University, 5.Institute of Nature and Environmental Technology, Kanazawa University, 6.Micro Analysis Laboratory, Tandem accelerator (MALT), The University of Tokyo)

*Naoko Nagatsuka¹, Kumiko Goto-Azuma^1,2, Akane Tsushima³, Koji Fujita⁴, Sumito Matoba⁵, Yukihiko Onuma⁶, Yuki Komuro⁷, Motohiro Hirabayashi¹, Jun Ogata¹, Yoshimi Ogawa-Tsukagawa¹, Kyotaro Kitamura¹, Teruo Aoki^1,2, Trevor James Popp⁸, Dorthe Dahl-Jensen⁸ (1.National Institute of Polar Research, 2.SOKENDAI, 3.Graduate School of Science, Chiba University, 4.Graduate School of Environmental Studies, Nagoya University, 5.Institute of Low Temperature Science, Hokkaido University, 6.Japan Aerospace Exploration Agency (JAXA), 7.Laboratory for Environmental Research at Mount Fuji, 8.University of Copenhagen)

*Takeda Komei¹, Chiyuki Narama², Ryo Inoue³, Kenshiro Arie¹ (1.Graduate School of Science and Technology, Niigata University, Environmental Science and Technology, 2.Niigata University, Program of Field Research in the Environment Sciences, 3.The Graduate University for Advanced Studies)

*Kenji Kawamura^1,3,4, Ayako Abe-Ouchi², Shuji Fujita^1,4, Prasad Gogineni⁵, David Braaten⁶, Kenichi Matsuoka⁷, Fuyuki SAITO³, Takashi Obase², Fumio Nakazawa^1,4, Shun Tsutaki^1,4, Ikumi Oyabu¹, Fernando Rodriguez-Morales⁶, John Paden⁶, Drew Taylor⁵, Elisabeth Isaksson⁷, Geir Maholdt⁷ (1.National Institute of Polar Research, Research Organization of Information and Systems, 2.University of Tokyo, 3.JAMSTEC, 4.SOKENDAI, 5.University of Alabama, 6.University of Kansas, 7.Norwegian Polar Institute)

*Ryo Inoue¹, Shuji Fujita^2,1, Kenji Kawamura^2,1,3, Ikumi Oyabu², Fumio Nakazawa^2,1, Hideaki Motoyama^2,1 (1.The Graduate University for Advanced Studies, 2.National Institute of Polar Research, 3.Japan Agency for Marine-Earth Science and Technology)

*Kumiko Goto-Azuma^1,2, Motohiro Hirabayashi¹, Kaori Fukuda¹, Jun Ogata¹, Yoshimi Ogawa-Tsukagawa¹, Kyotaro Kitamura¹, Ayaka Yonekura^1,3,2, Shuji Fujita^1,2, Kenji Kawamura^1,2, Fumio Nakazawa^1,2 (1.National Institute of Polar Research, 2.SOKENDAI, 3.Marine Works Japan Ltd.)

*Taigo Ando¹, Akira Oka¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo)

*Kazuho Horiuchi¹, Kento Sato², Riko Yagihashi¹, Kimikazu Sasa³, Masumi Matsumura³, Tsutomu Takahashi³, Hideaki Motoyama⁴ (1.Graduate School of Science and Technology, Hirosaki University, 2.Faculty of Science and Technology, Hirosaki University, 3.Accelerator Mass Spectrometry Group, Tandem Accelerator Complex, University of Tsukuba, 4.National Institute of Polar Research)