[M-IS25] Biogeochemistry

convener:Keisuke Koba(Center for Ecological Research, Kyoto University), Hideaki Shibata(Field Science Center fot Northern Biosphere, Hokkaido University), Naohiko Ohkouchi(Japan Agency for Marine-Earth Science and Technology), Youhei Yamashita(Faculty of Environmental Earth Science, Hokkaido University)

Biogeochemistry is an interdisciplinary study field including ecology, geochemistry, oceanography, limnology, hydrology, soil science, and environmental sciences. Respective researches have tended to be conducted separately so far. This session aims to provide a common platform for biogeochemists of different disciplines, which facilitates the interactive discussion and information exchanges for further development of biogeochemical studies.

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[MIS25-13] Rise and fall of nitrogen concentration in a river draining to the Sea of Japan driven by atmospheric deposition

*Ryo Sugimoto¹, Takeru Hirai¹, Kouki Negishi¹, Tomoko Tsuboi¹, Daisuke Tahara¹, Kazuyoshi Asai², Makoto Yamada³, Yumiko Watanabe⁴, Motoko Fujita⁵, Isaac Santos^6,7 (1.Faculty of Marine Biosciences, Fukui Prefectural University, 2.Geo-Science Laboratory Co. Ltd., 3.Faculty of Economics, Ryukoku University, 4.Graduate School of Science, Kyoto University, 5.Center for Southeast Asian Studies, Kyoto University, 6.Southern Cross University, 7.University of Gothenburg)

Cancelled

[MIS25-14] Factors shaping spatial distribution of dissolved black carbon in the eastern Indian Ocean

Yutaro Mori², Hiroshi Ogawa³, *Youhei Yamashita¹ (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Graduate School of Environemtnal Science, Hokkaido University, 3.Atmosphere and Ocean Research Institute, The University of Tokyo)

[MIS25-15] The water mass structure and nutrients distribution were revealed using colored dissolved organic matter (CDOM) in the western north Pacifiic Ocean and the northern Bering Sea

*Joji Oida¹, Toru Hirawake², Youhei Yamashita³, Hiroto Abe², Jun Nishioka⁴, Hisatomo Waga², Daiki Nomura² (1.Graduate School of Fisheries Sciences, Hokkaido University, 2.Faculty of Fisheries Sciences, Hokkaido University, 3.Faculty of Environmental Earth Science, Hokkaido University, 4.Institute of Low Temperature Science, Hokkaido University)

Cancelled

[MIS25-16] Optical characteristics of particulate organic matter in coastal marine environments

*Chia-Jung Lu¹, Hideki Fukuda¹, Hiroshi Ogawa¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo)

[MIS25-17] Variation of rubidium isotope and its possibility as a tracer of surface environment

Hiroyuki Tsuboi¹, Rimi Konagaya¹, *Yoshio Takahashi¹ (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)

[MIS25-18] Deep-sea environmental changes on the continental shelf off Sanriku, Japan, before and after the 2011 Tohoku Earthquake

*Masahide Wakita¹, Shuichi Watanabe¹, Jun Yoshino², Kazumasa Oguri¹, Hidetaka Nomaki¹, Shinsuke Kawagucci¹, Keisuke Ariyoshi¹, Akira Nagano¹, Katsunori FUJIKURA¹ (1.Japan Agency for Marine-Earth Science and Technology , 2.Tohoku Environmental Science Services Corporation)