*Michio Aoyama^1,2, Chikako Cheong³, Tsutomu Miura³, Takeshi Fujii⁴, Hitoshi Mitsuda⁴, Tomomi Sone⁵, Hiroshi Uchida¹, Akihiko Murata¹ (1.RIGC, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2.Faculty of Life and Environmental Sciences, University of Tsukuba, 3.National Institute of Advanced Industrial Science and Technology (AIST), National Metrological Institute of Japan (NMIJ), 4.Laboratory for Instrumentation and Analysis, KANSO CO., LTD. , 5.MARINE WORKS JAPAN LTD.)

*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)