Masazumi Arai

Last Updated :2024/07/03

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Assistant Professor
E-mail
araiocean.hiroshima-u.ac.jp
Self-introduction
My research fields are geophysical fluid dynamics and physical oceanography. In recent days, I am studying the influences of the Kuroshio on coastal oceans (especially, Kuroshio warm water tongues and kyucho), tidal mixing and tidal fronts, the influences of ageostrophic, unbalanced disturbances on the inverse cascade process of energy in geostrophic turbulence. My main method of research is numerical procedures using relatively simple numerical models in order to understand underlying physical processes and mechanisms of above oceanic phenomena.

Basic Information

Academic Degrees

  • Doctor of Science, Kyushu University

Educational Activity

  • [Bachelor Degree Program] School of Engineering : Cluster 1(Mechanical Systems, Transportation, Material and Energy) : Program of Transportation Systems
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Transportation and Environmental Systems Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Transportation and Environmental Systems Program

Research Fields

  • Mathematical and physical sciences;Earth and planetary science;Meteorology / Physical oceanography / Hydrology

Research Keywords

  • Kuroshio frontal waves, kyucho, internal Kelvin waves, bottom intrusion, the Bungo Channel
  • geostrophic turbulence, inverse cascade of energy, ageostrophic instability, loss of balance
  • tidal mixing, tidal front, the Bungo Channel
  • tidal vortex, the Seto Inland Sea, the Neko-Seto Strait
  • Kuroshio, Bifurcation Current, the Kii Channel

Educational Activity

Course in Charge

  1. 2024, Liberal Arts Education Program1, 1Term, General　Mechanics I
  2. 2024, Liberal Arts Education Program1, 3Term, General　Mechanics II
  3. 2024, Liberal Arts Education Program1, 4Term, Science of Vehicle and Transportation
  4. 2024, Undergraduate Education, Year, Graduation Thesis
  5. 2024, Graduate Education (Master's Program) , 1Term, Special Exercises on Transportation and Environmental Systems A
  6. 2024, Graduate Education (Master's Program) , 2Term, Special Exercises on Transportation and Environmental Systems A
  7. 2024, Graduate Education (Master's Program) , 3Term, Special Exercises on Transportation and Environmental Systems B
  8. 2024, Graduate Education (Master's Program) , 4Term, Special Exercises on Transportation and Environmental Systems B
  9. 2024, Graduate Education (Master's Program) , Academic Year, Special Study on Transportation and Environmental Systems
  10. 2024, Graduate Education (Doctoral Program) , Academic Year, Special Study on Transportation and Environmental Systems

Research Activities

Academic Papers

  1. Repeat meridional survey of the western North Pacific subtropical gyre by a VOS ADCP during 1997 to 1998, Geophysical Research Letters, 28(18), 3429-3432, 20010901
    Link to Paper Search Results by DOI
  2. Repeat ADCP survey of the Western Pacific surface current by a commercial ship, International WOCE Newsletter, 34, 31-35, 19990301
  3. ★, Asymmetric evolution of eddies in rotating shallow water, Chaos, 4(2), 163-175, 19940601
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  4. Study of the ferroelastic phase transition of TlH2PO4 acoustic phonon softening, Journal of the Physical Society of Japan, 60(1), 188-195, 19910101
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  5. Locally-induced nonlinear modes and multiple equilibria in planetary fluids, PAGEOPH, 133(4), 733-748, 19900401
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  6. Elastic instability in the ferroelastic phase transition of TlH2PO4 studied by Brillouin scattering, Journal of the Physical Society of Japan, 59(4), 1285-1292, 19900401
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  7. ★, Development of a semi-spectral coastal ocean model and its application to the Neko Seto Sea in the Seto Inland Sea., Journal of Oceanography, 60(3), 597-611, 20040601
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  8. Monitoring surface velocity from repeated ADCP observations and satellite altimetry, Journal of Oceanography, 60(2), 365-374, 20040401
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  9. ★, Numerical study of a Kyucho and a bottom intrusion in the Bungo Channel, Japan: Disturbances generated by the Kuroshio small meanders., Journal of Oceanography, 61(5), 953-971, 20051001
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  10. Elastic anomaly of the ferroelectric phase transition of Li2Ge7O15 studied by the Brillouin scattering., Journal of the Physical Society of Japan, 56(9), 3213-3219, 19870901
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  11. Operational data assimilation system for the Kuroshio south of Japan: Reanalysis and validation., Journal of Oceanography, 60(2), 303-312, 20040401
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  12. Numerical study of the current system along the southwest coast of the Kii Peninsula, Japan., Proc. the Indonesia Ocean Forum 2005 and the 13th PAMS/JECSS Workshop, CD-ROM, 20050701
  13. A numerical study of the Bifurcation Current and the Eastward Current in the Bungo Channel, Japan., Proc. 14th PAMS/JECSS Workshop, 238-241, 20070501
  14. Variation of Residual Current in the Seto Inland Sea Driven by Sea Level Difference Between the Bungo and Kii Channels, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 123(4), 2921-2933, 201804
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  15. Revisiting a coastal acoustic tomography experiment in Hiroshima Bay: Temporal variations in path-averaged currents and its relation to wind, APPLIED OCEAN RESEARCH, 102, 202009
    Link to Paper Search Results by DOI
  16. Monitoring Surface Velocity from Repeated ADCP Observations and Satellite Altimetry, Journal of Oceanography, 60(2), 365-374, 20040401