*Vigan Mensah¹, Yen-Chen Chen², Kay I. Ohshima^1,3 (1.Institute of Low Temperature Science, Hokkaido University, 2.Graduate Institute of Hydrological and Oceanic Science, National Central University, Taiwan, 3.Arctic Research Center, Hokkaido University)

*Mariko Honda¹, Kay I. Ohshima^2,3, Vigan Mensah², Jun Nishioka^2,3, Stephen Riser⁴, Masatoshi Sato⁵ (1.Graduate School of Environmental Science, Hokkaido University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Arctic Research Center, Hokkaido University, 4.University of Washington, 5.Wakkanai Fisheries Research Institute, Hokkaido Research Organization)

*Vigan Mensah¹, Miho Ikeda², Mizuki Komatsu¹, Kay I. Ohshima^1,3 (1.Institute of Low Temperature Science, Hokkaido University, 2.Department of Earth and Planetary Science, Faculty of Science, Hokkaido University, 3.Arctic Research Center, Hokkaido University)

*Kazuki Nakata¹, Misako Kachi¹, Rigen Shimada¹, Eri Yoshizawa¹, Kay I. Ohshima^2,3 (1.Earth Observation Research Center, Japan Aerospace Exploration Agency, 2.Institute of Low Temperature Science, Hokkaido University, 3.Arctic Research Center, Hokkaido University)

*Kay I. Ohshima^1,2, Masato Ito³, Kazuki Nakata⁴, Yasushi Fukamachi², Takeshi Tamura³ (1.Institute of Low Temperature Science, Hokkaido University, 2.Arctic Research Center, Hokkaido University, 3.National Institute of Polar Research, 4.Earth Observation Research Center, Japan Aerospace Exploration Agency)

*Yoshihiko Ohashi¹, Michiyo Yamamoto-Kawai², Kazuya Kusahara³, Ken’ichi Sasaki³, Kay I. Ohshima⁴ (1.The University Centre in Svalbard, 2.Tokyo University of Marine Science and Technology, 3.Japan Agency for Marine-Earth Science and Technology, 4.Hokkaido University)