| NONLINEAR WAVES WITH SEMI-GEOSTROPHIC FLOW |
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| 作者姓名： | Liu Shikuo Liu Shida |
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| 作者单位： | Department of Geophysics Peking University，Beijing，Department of Geophysics，Peking University，Beijing |
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| 摘 要： | In this paper,the semi-geostrophic approximation (or the geostrophic momentum approximation)isused for analyzing and solving the barotropic and baroclinic atmospheric motions.It is shown that thehorizontal nondivergent or quasi-geostrophic approximations cannot reflect the nonliner effect.However,the semi-geostrophic approximation not only filter out the inertia-gravity waves as the quasi-geostrophicapproximation,but also find the solution to the nonlinear equations.The Rossby waves obtained by thesemi-geostrophic approximation possess the nonlinear characteristics.Therefore the semi-geostrophic approx-imation provides a way to discuss the nonlinear problem.
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| 收稿时间： | 1987/11/4 0:00:00 |
NONLINEAR WAVES WITH SEMI-GEOSTROPHIC FLOW |
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| Liu Shikuo,Liu Shida.NONLINEAR WAVES WITH SEMI-GEOSTROPHIC FLOW[J].Acta Meteorologica Sinica,1988,2(4):517-526. |
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| Authors: | Liu Shikuo and Liu Shida |
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| Institution: | Department of Geophysics, Peking University, Beijing;Department of Geophysics, Peking University, Beijing |
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| Abstract: | In this paper,the semi-geostrophic approximation (or the geostrophic momentum approximation)is used for analyzing and solving the barotropic and baroclinic atmospheric motions.It is shown that the horizontal nondivergent or quasi-geostrophic approximations cannot reflect the nonliner effect.However,the semi-geostrophic approximation not only filter out the inertia-gravity waves as the quasi-geostrophicapproximation,but also find the solution to the nonlinear equations.The Rossby waves obtained by the semi-geostrophic approximation possess the nonlinear characteristics.Therefore the semi-geostrophic approximation provides a way to discuss the nonlinear problem. |
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