*Airi Maruyama¹, Tomohisa Irino¹ (1.Biogeochemistry Course, Earth System Science, Faculty of Environmental Earth Science, Hokkaido University)

*Song Lu¹, Youhei Yamashita², Tomohisa Irino², Toshihiro Tada³, Ryuji Tada³ (1.Graduate School of Environmental Science, Hokkaido University , 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Department of Earth and Planetary Science , Graduate School of Science, The University, of Tokyo)

*Asako Suzuki¹, Ken Sawada¹, Saki Yanou¹, Satoshi Furota², Tomohisa Irino³ (1.Graduate School of Science, Hokkaido University, 2.National Institute of Advanced Industrial Science and Technology, 3.Graduate School of Environment, Hokkaido University)

*Tomohisa Irino¹, Masanobu Yamamoto¹, Liviu Giosan², Steven Clemens³ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Woods Hole Institution of Oceanography, 3.Brown University)

*Mui Fa Alison Lee¹, Tomohisa Irino¹ (1.Faculty of Environmental Earth Science, Hokkaido University)

*Song Lu¹, Yoshie Nakai¹, Youhei Yamashita², Tomohisa Irino², Yuzo Miyazaki³, Ryuji Tada⁴, Takeshi Nakagawa⁵ (1.Graduate School of Environmental Science, Hokkaido University , 2.Faculty of Environmental Earth Science, Hokkaido University, 3.Institute of Low Temperature Science, Hokkaido University , 4.Department of Earth and Planetary Science , Graduate School of Science, The University, of Tokyo , 5.Research Center for Palaeoclimatology, Ritsumeikan University)

*Mutsumi Iizuka¹, Osamu Seki¹, Keiji Horikawa³, Tina van de Flierdt², Tomohisa Irino¹, Masanobu Yamamoto¹, Takuya Itaki⁴, Saiko Sugisaki⁴, Minoru Ikehara⁵, Yusuke Suganuma⁶ (1.Hokkaido university, 2.Imperial College London, 3.University of Toyama, 4.Geological Survey of Japan, 5.Center for Advanced Marine Core Research, Kochi University, 6.National Institute of Polar Research)