*早稲田 卓爾¹、野瀬 毅彦¹、小平 翼¹、Kohout Alison²、Gemmrich Johannes³、Shen Hui⁴、Inoue Jun⁵ (1.東京大学、2.National Institute of Water and Atmospheric Research、3.University of Victoria、4.Bedford Institute of Oceanography、5.National Institute for Polar Research)