Thu. May 29, 2025 10:45 AM - 12:15 PM Exhibition Hall Special Setting (2) (Exhibition Hall 7&8, Makuhari Messe)

[E] Oral
| A (Atmospheric and Hydrospheric Sciences )
| A-HW Hydrology & Water Environment

[A-HW27] Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts

11:00 AM - 11:15 AM

[AHW27-08] Integrated multi-isotope model to assess nutrient balances in watershed ecosystems: Application of phosphate oxygen isotope

*Takuya Ishida¹, Ken'ichi Osaka², Takashi Sambuichi³, Tomoya Iwata⁴, Ichiro Tayasu⁵, Urumu Tsunogai³, Fumiko Nakagawa³, Yusuke Ozawa⁶, Noboru Okuda⁶ (1.Hiroshima University, 2.University of Shiga Prefecture, 3.Nagoya University, 4.Yamanashi University, 5.Research Institute for Humanity and Nature, 6.Kobe University)

Thu. May 29, 2025 1:45 PM - 3:15 PM Exhibition Hall Special Setting (6) (Exhibition Hall 7&8, Makuhari Messe)

[J] Oral
| A (Atmospheric and Hydrospheric Sciences )
| A-CG Complex & General

[A-CG50] Biogeochemical linkages between the surface ocean and atmosphere

1:45 PM - 2:00 PM

[ACG50-01] High-sensitivity tracer assay for oxygen consumption rate in seawater column: Application to quantify new production rate

*Urumu Tsunogai¹, Yuto Watanabe¹, Fumiko Nakagawa¹ (1.Graduate School of Environmental Studies, Nagoya University)

2:45 PM - 3:00 PM

[ACG50-04] Tracing the sources of excess methane in subsurface seawater using both stable carbon and hydrogen isotope ratios as tracers

*Fumiko Nakagawa¹, Urumu Tsunogai¹, Kotaro Takada¹, Masanori Ito¹, Shintaro Sato², Sohiko Kameyama³ (1.Graduate School of Environmental Studies, Nagoya University, 2.Graduate School of Science, Hokkaido University, 3.Graduate School of Environmental Science, Hokkaido University)

Thu. May 29, 2025 3:30 PM - 5:00 PM Exhibition Hall Special Setting (6) (Exhibition Hall 7&8, Makuhari Messe)

[J] Oral
| A (Atmospheric and Hydrospheric Sciences )
| A-CG Complex & General

[A-CG50] Biogeochemical linkages between the surface ocean and atmosphere

4:00 PM - 4:15 PM

[ACG50-07] Distribution and origin of methane-rich plumes in the shallow water columns, off Boso area

*Chihiro Amaki¹, Urumu Tsunogai¹, Kotaro Takada¹, Yu Kitamura¹, Fumiko Nakagawa¹, Tsuyoshi Yoshida², Fumiyoshi Kondo³, Yoko Iwamoto⁴ (1.Graduate school of Environmental Studies, Nagoya University, 2.Chiba Prefectural Environmental Research Center, 3.Japan Coast Guard Academy, 4.Graduate School of Integrated Sciences for Life, Hiroshima University)

Tue. May 27, 2025 10:45 AM - 12:15 PM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC32] Active Volcanism

11:15 AM - 11:30 AM

[SVC32-18] Development of UAV-mounted vertical sensor array system to estimate emission flux of hydrogen sulfide from fumarolic fields

*Yutaka Miyagi¹, Urumu Tsunogai¹, Masaaki Morita², Ryunosuke KAZAHAYA³, Fumiko Nakagawa¹ (1.Graduate school of Environmental Studies, Nagoya University, 2.Earthquake Research Institute, The University of Tokyo, 3.The National Institute of Advanced Industrial Science and Technology)

Wed. May 28, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| B (Biogeosciences )
| B-CG Complex & General

[B-CG06] Decoding the history of Earth: From Hadean to the present

5:15 PM - 7:15 PM

[BCG06-P14] Developement of a novel pretreatment method for measuring the triple oxygen isotope compositions of phosphate associated with iron rocks

*Takashi Sambuichi¹, Urumu Tsunogai¹, Tatsuki Orito¹, Fumiko Nakagawa¹ (1.Graduate School of Environmental Studies, Nagoya university)

Tue. May 27, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| M (Multidisciplinary and Interdisciplinary)
| M-IS Intersection

[M-IS22] Biogeochemistry

5:15 PM - 7:15 PM

[MIS22-P04] Simultaneous quantification on the emission flux and aerobic oxidation rate of methane in a crater lake by using the stable isotopes as tracers

*Yu Kitamura¹, Urumu Tsunogai¹, Fumiko Nakagawa¹ (1.Nagoya University)

Fumiko Nakagawa

Speaker, Author, Co-Author