Equatorial waves in steady zonal shear flow
Equatorial waves in steady zonal shear flow
复制标题
稳定纬向剪切流中的赤道波
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
R. C. Bell
中科院分区：
文献类型：
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作者：
R. A. Plumb;R. C. Bell
在平流层下层的赤道β平面模型中研究了赤道开尔文波和混合罗斯-重力波的性质。假定基本状态和波幅与时间无关；这些波通过热阻尼和/或机械阻尼消散。
The properties of equatorial Kelvin and mixed Rossby-gravity waves are investigated in an equatorial beta-plane model of the lower stratosphere. The basic state and wave amplitudes are assumed to be independent of time; the waves are dissipated by thermal and/or mechanical damping.
Particular emphasis is placed on the forcing of the mean flow by the waves. In agreement with earlier studies the latitudinal structure of the mean flow forcing is found to be sensitive to the dissipation mechanism; when the mean state is one of no zonal motion the easterly mixed Rossby-gravity wave-induced acceleration of the zonal flow is zero on the equator when only thermal dissipation acts, but maximizes on the equator when dissipation is included. This latter property is also found in the presence of equatorial jets.
Results from this model, with its explicit resolution of the wave structure, are compared with those from the multiple-scales approach of Boyd; good agreement is found.