*Emi Yati^1,6、Shoshiro Minobe^1,2、Nathan Mantua³、Shin-ichi Ito⁴、Emanuele Di Lorenzo⁵ (1.Department of Natural History Sciences, Graduate School of Science, Hokkaido University.、2.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University. E-mail: minobe@sci.hokudai.ac.jp、3.Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, California 95060, USA.、4.Atmosphere and Ocean Research Institute, University of Tokyo.、5.School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA.、6.Remote Sensing Application Center, Indonesian National Institute of Aeronautics and Space.)