*Osamu Seki¹, Naomi Harada², Igarashi Yaeko³ (1.Institute of Low Temperature Science, Hokkaido University, 2.JAMSTEC, 3.Institute for Paleoenvironment of Northern Regions)

*Kenta Suzuki¹, Masanobu Yamamoto^1,2, Brad Rosenheim³, Takayuki Omori⁴, Leonid Polyak⁵, Seung-Il Nam⁶ (1.Graduate School of Environmental Science, Hokkaido University, 2.Faculty of Environmental Earth Science, Hokkaido University, 3.College of Marine Science, University of South Florida, 4.University Museum, University of Tokyo, 5.Byrd Polar and Climate Research Center, Ohio State University, 6.Korea Polar Research Institute)

*Ryu Uemura¹, Kanako Omine¹, Kosuke Masaka¹, Ryuji Asami², Mahjoor Ahmad Lone³, Yu-Chen Chou³, Chuan-Chou Shen³ (1.University of the Ryukyus, 2.Tohoku University, 3.National Taiwan University)

*Narumi Ishizawa^1,2, Yusuke Yokoyama^1,2, Yosuke Miyairi², Takahiro AZE², Shoko Hirabayashi^1,2 (1.Graduate school of science, The University of Tokyo, 2.Atmosphere and Ocean Research Institute, The University of Tokyo)

*Akihiro Kano¹, Hirokazu Kato¹, Shota Amekawa¹, Taiki Mori² (1.Graduate School of Science, The University of Tokyo, 2.Graduate School of Integrated Science for Global Sciety, Kyushu University)

*Hidetaka Kobayashi¹, Akira Oka¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo)