Ayako Yamamoto¹, Masami Nonaka², Akira Yamazaki², Patrick Martineau³, Young-Oh Kwon⁴, Hisashi Nakamura³ and Bunmei Taguchi⁵, (1)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kanagawa, Japan, (2)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, (3)The University of Tokyo, Tokyo, Japan, (4)Woods Hole Oceanographic Institution, Physical Oceanography Department, Woods Hole, MA, United States, (5)University of Toyama, Faculty of Sustainable Design, Toyama, Japan