*Hiroki Ikawa^1,2, Taro Nakai^3,2, Busey Robert², Kim Yongwon², Hideki Kobayashi⁴, Shin Nagai⁴, Masahito Ueyama⁵, Kazuyuki Saito⁶, Hirohiko Nagano^7,2, Larry Hinzman², Rikie Suzuki⁴ (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)

*Kumiko TAKATA^1,2,3, Prabir Patra³, Dmitry Belikov^2,1, Ayumi Kotani⁴, Junko Mori^3,1, GTMIP Group, Kazuhito Ichii³, Tazu Saeki³, Yosuke Niwa⁵, Kazuyuki Saito³, Takeshi Ohta⁴, Shamil Maksyutov², Toshinobu Machida², Alexander Ganshin^6,7, Ruslan Zhuravlev^6,7, Atsuko Sugimoto⁸, Shuji Aoki⁹ (1.Arctic Environment Research Center, National Institute of Polar Research, 2.CGER, National Institute for Environmental Studies, 3.Japan Agency for Marine-Earth Science and Technology, 4.Nagoya Univ., 5.Meteoroligical Research Institute, JMA, 6.Tomsk State University, 7.Central Aerological Observatory, 8.Hokkaido University, 9.Tohoku University)