RIAM, Research Institute for Applied Mechanics, Kyushu University

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Division of Earth Environment Dynamics

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Pamphlet [1] [2]

 The objectives of this division are to clarify the dynamical processes which control the earth environment particularly in ocean-atmosphere system, through wide range various approaches such as field observations, numerical modeling along with theoretical studies and marine observing engineering. Target of our research is ocean and atmosphere change due to human-induced environmental issues. Our goal is quantitative understanding of the processes concerning the ocean-atmospheric environmental change based on various approaches combining observations and modeling, where fundamental processes such as not only physical but also chemical and biological processes should be contained in the interactive collaboration of theoretical, observational and numerical studies including science and technology.


Atmospheric Environment Modeling Section

Atmospheric Environment Modeling


Regional Oceanography Section

Experimental research on environmental changes in the coastal and marginal seas in the East Asian region

The section of the Regional Oceanography studies the physical mechanism of characteristic phenomena in the coastal and marginal seas and the impacts of climate change and anthropogenic activities on these areas.

Temporal variations

Temporal variations in vertical profiles of (upper) turbulent energy dissipation rate
and (lower) current velocity observed at coastal region.

Lagrange observation Lagrange observation
Lagrange observation of the Taiwan Current with satellite-tracked surface drifters.


Synoptic Oceanography Section

Synoptic Oceanography Section is aiming to explain the physical processes related to the East-Asia ocean environment through numerical simulation and ocean monitoring.

Velocity field seen by HF radar
Velocity field seen by HF radar (green box) and surrounding sea surface height anomaly. Slow (fast) Kuroshio is shifted to the north (south) in the top (bottom) panel.
Numerical results of LES
Numerical results of LES; birds-eye view of east-west velocity isosurface near the ocean floor.

Atmospheric Physics Section

Atmospheric Physics Section investigates climatic effects of aerosol and clouds, based on satellite- and ship-borne measurements using radar and lidar, toward thorough understanding of atmospheric radiation and water cycle in the climate system.

Atmospheric Physics


Ocean Engineering Section

The Ocean Engineering Section is concerned with the fundamental study of the hydrodynamics and the control of vehicles and structure for ocean measurement and ocean development. Loads and motions of submerged ocean structures caused by waves and currents are also covered by this section.

Ocean Engineering Ocean Engineering


Nonlinear Dynamics Section

Nonlinear phenomena of turbulence and waves in fluid

Normalized modal time correlation
Normalized modal time correlation function as a function of the time normalized by the characteristic time:
a solution to the odel equiation under a similarity assumption (blue); direct numerical simulaton(red)
Three-dimensional steady progressive limiting water wave with harmonic resonace
Three-dimensional steady progressive limiting water wave with harmonic resonace.

Two-dimensional interaction of internal solitary waves in two-layer fluid
Two-dimensional interaction of internal solitary waves in two-layer fluid.
The large-amplitude solitary wave is generated by the interaction of two solitary waves.

Research Sections