*Shota Amekawa¹, Kenji Kashiwagi², Masako Hori³, Tomomi Sone⁴, Hirokazu Kato¹, Tomoyo Okumura⁵, Tsai-Luen Yu⁶, Chuan-Chou Shen^6,7,8, Akihiro Kano¹ (1.Graduate School of Science, The University of Tokyo, 2.Department of Environmental Biology and Chemistry, Faculty of Science, University of Toyama, 3.Division of Natural Sciences, Osaka Kyoiku University, 4.Marine Works Japan LTD., 5.Center for Advanced Marine Core Research, Kochi University, 6.High-precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, 7.Global Change Research Center, National Taiwan University, 8.Research Center for Future Earth, National Taiwan University)

*Ryo Matsumoto¹, Hitoshi Tomaru¹, Yoshitaka Kakuwa¹, Glen Snyder¹, Akihiro Hiruta¹, Yoshihiro Kakizaki¹, Tsai-Luen Yu³, Chuan-Chou Shen³, Fumio Akiba⁴, Takeshi Oi¹, Naoto Ishida⁵, Shinsuke Aoki¹, Alexander Derkachev², Renat Shakirov², Anatoly Obzhirov² (1.Meiji University, 2.Pacific Oceanological Institute, FEB RAS, 3.HISPAC Dept of Geosciences National Taiwan University, 4.Diatom Minilaboratory, 5.Tottori University)