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通过分析二维情况下重力波波包在等温大气中非线性传播的数值模拟结果,对非线性效应对重力波特性的影响做了定量分析.分析结果表明:重力波在非线性传播过程中,一方面由于非线性的作用,随着波振幅的增加,垂直波长减小,同时平流成份增加;另一方面,尽管存在非线性效应,线性重力波的色散关系与偏振关系仍然适用.这表明基于线性重力波理论的色散关系与偏振关系能够在很大程度上广泛适用于非线性情况
By analyzing the numerical simulation results of the nonlinear propagation of gravity wave packets in isothermal atmosphere under two-dimensional conditions, the effects of nonlinear effects on the characteristics of gravity waves are quantitatively analyzed. The results show that the gravity wave decreases nonlinearly with the increase of the amplitude of the wave due to the nonlinear effect. On the other hand, despite the nonlinear effect, the linear gravity The relationship between dispersion and polarization of the wave still applies. This shows that the relationship between dispersion and polarization based on the theory of linear gravitation can be widely used in a large extent for nonlinear situations