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Ocean Circulation Dynamics Lab
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The lab goes out to sea on research vessels to investigate the circulation and mixing of seawater.

AboutAbout the lab
Using observations to understand how ocean currents flow and mix.
The Ocean Circulation Dynamics Lab studies how the ocean circulates, aiming to explain these mechanisms in terms of dynamics.
Centered on in situ observations using research vessels and moored instruments, the lab carries out its research in collaboration with research institutions in Japan and abroad.
The lab's members conduct their own observations and analyze the results.
The lab's website introduces the Ocean Dynamics Analysis Lab and the Ocean Circulation Dynamics Lab (Ocean Circulation Dynamics Laboratory) together.
Key terms
- Internal wave
- A wave that occurs within the ocean, rather than a wave seen on the sea surface
- Internal soliton
- A type of internal wave in which several waves travel together in a train (nonlinear internal wave)
ResearchResearch themes
This lab aims to clarify the processes of ocean circulation from the perspective of dynamics. Centered on in situ observations using research vessels and moored instruments, it investigates the circulation and mixing of seawater in the marginal seas of East Asia, as well as the flow and mixing of seawater in inner bays and coastal waters.
*Illustrative imageMixing of Seawater in the East China Sea
Using research vessels, the lab attempts to capture the internal structure of eddies formed at the boundary between Kuroshio water and continental shelf water. At the shelf edge, repeated mooring observations have confirmed that internal waves occur frequently, and the lab is investigating how they relate to seawater mixing.
*Illustrative imageObservations of Internal Solitons
On the continental shelf of the East China Sea, the lab studies internal solitons (nonlinear internal waves) using observational data from current meters (ADCPs) placed on the seafloor. It uses methods that estimate the speed and direction of wave propagation and the magnitude of vertical motion.
MembersFaculty
The members of the Ocean Circulation Dynamics Lab consist of faculty, secretaries, and doctoral and master's students.As of 2026
- Associate ProfessorTomoharu Senju
- Associate ProfessorTakahiro Endoh
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “CTD rosette (OOI 401)” Ocean Observatories Initiative / Public domain (cropped)
- Mixing of Seawater in the East China Sea: “Mar de China Oriental - BM WMS 2004” Serg!o / Public domain (cropped)
- Observations of Internal Solitons: “Oceanic nonlinear internal solitary waves from the Lombok Strait (MODIS )” Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
- Related lab (海
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