*Shusaku Sugimoto¹, Eitarou Oka², Bo Qiu³ (1.Graduate School of Science, Tohoku University, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, 3.Department of Oceanography, University of Hawaii at Manoa)

*Hatsumi Nishikawa¹, Eitarou Oka¹, Shusaku Sugimoto², Yoshimi Kawai³, Fumiaki Kobashi⁴ (1.Atmosphere and Ocean Research Institute, University of Tokyo, 2.Tohoku University, 3.Japan Agency for Marine-Earth Science and Technology, 4.Tokyo University of Marine Science and Technology)

*Akane Hosoda¹, Ryuji Asami², Shusaku Sugimoto³, Hideko Takayanagi², Ryuichi Shinjo^4,5, Toru Nakamori², Yasufumi Iryu² (1.Faculty of Science, Tohoku University, 2.Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, 3.Department of Geophysics, Graduate School of Science, Tohoku University, 4.Research Institute for Humanity and Nature, 5.Department of Physics and Earth Science, Faculty of Science, University of Ryukyus )