*Nobukazu Seama¹, Takayuki Kitagawa¹, Kyoko Okino², Masakazu Fujii², Kazuo Nakahigashi¹, Osamu Okamoto¹, Yuka Furukawa³, Takumi Kobayashi³, Yoshifumi Nogi⁴ (1.Department of Planetology, Graduate School of Science, Kobe University, 2.Atmosphere and Ocean Research Institute, University of Tokyo, 3.Department of Planetology, Faculty of Science, Kobe University, 4.National Institute of Polar Research)