Member

YAMAGUCHI, Ryohei Associate Professor Atmosphere and Ocean Research Institute Office: Atomosphere and Ocean Research Institute-610 E-mail: HP: http://sites.google.com/view/ryohei-yamaguchi/
Research Field Physical Oceanography, Ocean Carbon Cycle, Ocean Observation, Climate Change Current Research Since the Industrial Revolution, increasing greenhouse gas concentrations have been driving substantial changes in both physical and biogeochemical processes in the ocean, with their impacts becoming increasingly evident in recent years. My research aims to quantitatively characterize these oceanic changes using in situ observations, particularly ship-based measurements and Argo floats, and to elucidate the underlying physical and biogeochemical mechanisms. Examples of research topics:(1) Impacts of increasingly frequent marine heatwaves on oceanic CO₂ uptake(2) Links between changes in intermediate-to-deep circulation and ongoing ocean deoxygenation in the North Pacific(3) Observation-based quantification of the ocean biological carbon pump and its variability and long-term changes(4) Quantitative understanding of ocean responses to tropical cyclones using Argo data Representative Publications 1. Yamaguchi, R., Kouketsu, S., Kosugi, N. et al. Global upper ocean dissolved oxygen budget for constraining the biological carbon pump. Commun Earth Environ 5, 732 (2024). 2. Yamaguchi, R., Kim., J.-E., Rodgers, K. B., et al. Persistent ocean anomalies as a response to northern hemisphere heating induced by biomass burning variability. J. Clim. 36, 23, 8225–8241 (2023). 3. Yamaguchi, R., Rodgers, K.B., Timmermann, A. et al. Trophic level decoupling drives future changes in phytoplankton bloom phenology. Nat. Clim. Chang. 12, 469–476 (2022).

YAMAGUCHI, Ryohei

Associate Professor
Atmosphere and Ocean Research Institute

Office: Atomosphere and Ocean Research Institute-610
E-mail:
HP: http://sites.google.com/view/ryohei-yamaguchi/

Research Field

Physical Oceanography, Ocean Carbon Cycle, Ocean Observation, Climate Change

Current Research

Since the Industrial Revolution, increasing greenhouse gas concentrations have been driving substantial changes in both physical and biogeochemical processes in the ocean, with their impacts becoming increasingly evident in recent years. My research aims to quantitatively characterize these oceanic changes using in situ observations, particularly ship-based measurements and Argo floats, and to elucidate the underlying physical and biogeochemical mechanisms.
Examples of research topics:(1) Impacts of increasingly frequent marine heatwaves on oceanic CO₂ uptake(2) Links between changes in intermediate-to-deep circulation and ongoing ocean deoxygenation in the North Pacific(3) Observation-based quantification of the ocean biological carbon pump and its variability and long-term changes(4) Quantitative understanding of ocean responses to tropical cyclones using Argo data

Representative Publications

1. Yamaguchi, R., Kouketsu, S., Kosugi, N. et al. Global upper ocean dissolved oxygen budget for constraining the biological carbon pump. Commun Earth Environ 5, 732 (2024).
2. Yamaguchi, R., Kim., J.-E., Rodgers, K. B., et al. Persistent ocean anomalies as a response to northern hemisphere heating induced by biomass burning variability. J. Clim. 36, 23, 8225–8241 (2023).
3. Yamaguchi, R., Rodgers, K.B., Timmermann, A. et al. Trophic level decoupling drives future changes in phytoplankton bloom phenology. Nat. Clim. Chang. 12, 469–476 (2022).