*Hirohiko Masunaga¹, Naoto Ebuchi², Takeshi Tamura³, Kei Yoshimura⁴, Kazumasa Aonashi⁵, Masahiro Kazumori⁶, Katsuya Saitoh⁷ (1.Nagoya University, 2.Hokkaido University, 3.National Institute of Polar Research, 4.University of Tokyo, 5.Meteorological Research Institute, 6.Japan Meteorological Agency, 7.Japan Fisheries Information Service Center)