*Ikawa Hiroki^1,2、中井 太郎^3,2、Busey Robert²、Yongwon Kim²、小林 秀樹⁴、永井 信⁴、植山 雅仁⁵、斉藤 和之⁶、Nagano Hirohiko^7,2、Hinzman Larry²、鈴木 力英⁴ (1.National Institute for Agro-Environmental Sciences、2.International Arctic Research Center、3.Hydrospheric Atmospheric Research Center, Nagoya University、4.Department of Environmental Geochemical Cycle Research, Japan Agency for Marine-Earth Science and Technology、5.Graduate School of Life and Environmental Sciences, Osaka Prefecture University、6.Department of Integrated Climate Change Projection Research, Japan Agency for Marine-Earth Science and Technology、7.Faculty of Horticulture Chiba University)