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物理学报  2013 

Dynamic modification of the shallow water equation on the slowly changing underlying surface condition
缓变下垫面对浅水方程的动力学订正

Keywords: underlying surface,global warming,slowly changing,shallow water equation
下垫面
,全球变暖,缓变,浅水方程

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Abstract:

In this paper, the shallow water equation is discussed, when the underlying surface is slowly changing. From the continuity equation and the equation of motion controlling the movement of the atmosphere, the slowly changing of the underlying surface is superimposed on the topography function as a small quantity, using the upper and lower boundary conditions of the atmosphere, the modified shallow water equation is obtained. In the modified shallow water equation, the slowly changing local horizontal divergence modifies the equilibrium between the local horizontal divergence and the local change of the thickness of the atmosphere. On the basis of this, the vorticity equation is obtained, which contains the slowly changing underlying surface.

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