*SIJUN CHEN¹、Victor S. Kuwahara²、Satoru Taguchi³、Tomohiro Yui⁴、Kazutaka Takahashi⁴ (1.Center for International and Local Research Cooperation, Atmosphere and Ocean Research Institute, The University of Tokyo、2.Faculty of Education and Graduate School of Science & Engineering, Soka University、3.National Institute of Polar Research、4.Graduate School of Agricultural and Life Sciences, The University of Tokyo)