| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2012: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Outline of Final Research Achievements |
Jet formation process on a beta plane and a rotating sphere was studied theoretically and numerically for incompressible two-dimensional fluids. The jet formation is observed in several situations including Jovian atmosphere, but its dynamical mechanism is not yet well understood. In this study, we have obtained an analytical description for the amount of jet acceleration on the beta plane by the use of the pseudo momentum given by the weakly nonlinear theory of Rossby waves, employing asymptotic forms of the eigenfunctions of the continuous modes in the linear stability problem of the jet flow. We also performed a numerical simulation of the fluid equation, and obtained a good agreement between the theoretical prediction and the numerically observed values for the jet acceleration.
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