摘要
利用扰动法导得了非线性强迫Boussinesq方程 ,利用数值解讨论了地形和外源等局地强迫激发的非线性长波扰动的一般性状和时间演变特征 ,并对移动性孤波与地形的相互作用进行了分析研究。
It generalizes the theory developed by Helfrich and Pedlosky [1] for time\|dependent coherent structures in a marginally stable zonal flow by including forcing.Such forcing could be due to topography or to an external source.By using a perturbation method,the nonlinear differential equation is obtained for governing the evolution of a disturbance excited by those forcings.Some general features of the excited disturbance are given by numerically solving the governing equation.It further studies the interaction between solitary wave and topography and reveals that the solitary wave can always climb over the topography,but depending on the initial conditions of solitary wave and the height of topography,the initial solitary wave could keep most of its mass or be fissioned into two solitary waves traveling in opposite directions. [
出处
《计算物理》
CSCD
北大核心
2000年第3期259-267,共9页
Chinese Journal of Computational Physics
关键词
局地强迫
弧波
非线性长波扰波
大气
localized forcing
solitary wave
forced boussinesq equation [CLC number] P433[Document code]\ A
