*Hiroto Kajita^1,2,3,4,5, Yuta Isaji², Rintaro Kato³, Yoko Nishikura⁴, Masafumi Murayama⁶, Naohiko Ohkouchi², Shouye Yang⁷, Hongbo Zheng⁸, Ke Wang^8,3, Toshimichi Nakanishi⁹, Takenori Sasaki³, Ayumi Maeda^3,4,5, Atsushi Suzuki⁵, Hodaka Kawahata^3,4,5 (1.National Institute for Polar Research, 2.Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, 3.Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, 4.Atmosphere and Ocean Research Institute, the University of Tokyo, 5.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 6.Center for Advanced Marine Core Research, Kochi University, 7.State Key Laboratory of Marine Geology, Tongji University, 8.Research Center for Earth System Science, Yunnan University, 9.Museum of Natural and Environmental History)

*Yasuhide Nakamura¹, Hiroto Kajita³, Ayumi Maeda⁴, Koji Seto¹, Takuto Ando¹, Kota Katsuki¹, Yoshiki Saito¹, Eri Tanaka Ogiso² (1.Estuary Research Center, Shimane University, 2.National Museum of Nature and Science, 3.National Institute of Polar Research, 4.National Institute of Advanced Industrial Science and Technology )

*Ayumi Maeda¹, Miyuki Nishijima¹, Akira Iguchi¹, Atsushi Suzuki¹, Jumpei Minatoya² (1.Geological Survey of Japan, 2.Japan Oil, Gas and Metals National Corporation All Rights)