| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Satellite Synthetic Aperture Radar (SAR) have provided useful insights into the ocean surface. Because SAR images reproduce roughness at the sea surface, it is crucial to understand the physics of short gravity waves. In this study, we investigated the spectral structure and source term balance of short gravity waves. The wave model reproduced the spectral form in the higher wavenumber domain using the nonlinear dissipation term. In the equilibrium range, nonlinear transfer played a major role in maintaining equilibrium conditions. On the other hand, in the saturation range, which starts at the upper limit of the equilibrium range, nonlinear transfer did not keep up with other source terms, and the dissipation term was in balance with wind input.
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