A01-1 Development of methods and systems for vertical mixing and observations

Principal investigator:　Ichiro Yasuda (Professor, Atmosphere and Ocean Research Institute (AORI), The University of Tokyo, Physical Oceanography)

[Overview]

This team develop/introduce/make practical observational systems of vertical mixing and perform large-scale in-situ observations under corporations with other teams.

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A01-2 Pacific Ocean State Estimation and Clarification of Mechanism of Ocean Circulation by Data Synthesis of Global Observations

Principal investigator : Shuhei Masuda (JAMSTEC R&D Center for Global Change Group leader Physical Oceanography)

[Overview]

This team synthesises pre-existing ocean data with newly-acquired turbulence data using state-of-art assimilation technique. Our obsevation plans include ship-based hydrographic cruises in the Pacific and Indian oceans where a microstructure profiler will be used to measure turbulence strength in the ocean along the cruise track.

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A02-3 Ocean mixing in the sub-polar marginal seas and biogeochemical dynamics in the western North Pacific

Principal investigator : Jun Nishioka (Hokkaido University⋅Institute of Low Temperature Science⋅Associate Professor⋅Chemical Oceanography)

[Overview]

This team performs research to understand the dynamics of nutrients (including N, P, Si and Fe) and their induced biological production in the western North Pacific. We plan to perform keen international collaborations from ocean observations to the data analyses.

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A02-4 Mixing Processes, nutrient transport, fundamental structure of ecosystem in the Kuroshio and its origin area

Principal investigator : Xinyu Guo (Professor, Center for Marine Environmental Studies, Ehime University, Physical Oceanography)

[Overview]

This team performs reasearch to quantitatively evaluate energy dispersion in the ocean lateral boundary that partly contributes to the formation of western boundary currents such as the Kuroshio, and to understand the role of Kuroshio in supplying nutrients to primary production in the open ocean.

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A03-5 Study on the change in lower trophic ecosystem and its complex mechanism in the North Pacific

Principal investigator : Naomi Harada (JAMSTEC Research and Development Center for Global Change)

[Overview]

This team performs research lower-trophic level ecosystem structure/variability/dynamics and their relation to mixing in the western North Pacific where the most active biological drawdown of sea surface pCO2 area works in the world.

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A03-6 Environmental history of living marine resources and fluctuation of fisheries resources

Principal investigator : Shin-ichi Ito (Professor, Atmosphere and Ocean Research Institute (AORI), The University of Tokyo)

[Overview]

This team performs research to elucidate direct and indirect influences of the long-term fluctuation of ocean mixing processes caused by 18.6-year nodal tide on fisheries resources by high resolution isotope analysis of fish juvenile otoliths and marine ecosystem-fish coupled models.

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A04-7 Dynamical analysis of diapycnal mixing processes in the ocean toward the formulation of their accurate parameterizations

Principle investigator : Toshiyuki Hibiya (Professor, Graduate School of Science, The University of Tokyo)

[Overview]

This team performs research to formulate a “seamless” parameterization of diapycnal mixing processes that can be applied throughout the water column, namely, from the ocean surface down to the ocean bottom.

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A04-8 Model development and impact assessment for ocean circulation, marine material cycles and climate by incorporating the effect of oceanic vertical mixing

Principal investigator : Hiroyasu HASUMI (Professor, Atmosphere and Ocean Research Institute, The University of Tokyo, Ocean modeling)

[Overview]

This team performs research to reveal the three-dimensional structure of the North Pacific circulation induced by ocean mixing and to understand its influence on the climate, and also to describe the materials cycles in the North Pacific under the influences of physical transport and biogeochemical processes.

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