The effects of constant wind shear on atmospheric gravity wave spectrum are examined.At first a three-dimensional equilibrium spectral model of gravity waves is established in which wind shear rate β is implicit.Based on this model,the expressions for one-dimensional frequency spectrum of atmospheric gravity waves arederived in which β is explicit.Numerical results show that （1） if we assume that mean wind U（z）=βz（z represents the altitude） and the internal gravity wave spectrum at the altitude of U=0 （that is,z=0） isVanZandt one,then the effect of Doppler shifting due to mean wind may be ignored;（2） when Richardson numberJ(J=N2/β2,N is Brunt-V（?）is（?）l（?） frequency,and is equal to 10-2s-1 in this paper) satisfies J≥10.0,theeffects ofwind shear arealso ignored;（3）for f2（?）ω2（?）N2 (f is the inertia frequency,and f=10-4s-1in this paper,and co is the observed frequency),the wind shear only affects the spectral amplitude,and does notalter the spectral shape;and （4） as wind shear becomes strong,a part of wave potential energy turns into wavekinetic one,and a part of the vertical kinetic energy further turns into the horizontal one.
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机译：检查恒定风剪切对大气重力波谱的影响。首先建立了重力波的三维平衡光谱模型，其中风剪率β是隐式的。基于该模型，是一维频谱的表达式大气重力波中的β是显性的。如果我们假设平均风U（z）=βz（z代表高度）和u u = 0的海拔地区的内部重力波谱（1）则显示（1）即，z = 0）Isvanzandt一个，那么由于平均风引起的多普勒换档的效果可能被忽略;（2）当Richardson NumberJ（j = n 2 /β 2 ，n是brunt-v（α）是（α）l（α）频率，并且在本文中等于10 -2 s -1 ）满足J≥10.0，忽略了剪切AREALSO的“效应”忽略了;（3）对于F 2 （ω）ω 2 （α）n 2 （f是本文中的惯用频率和f = 10 -4 s -1 -1 -1 ，CO是观察到的频率），风剪不到a选择光谱幅度，并备nOberter谱形状;（4）随着风剪切变强，波动电位能量的一部分变成了波动的一个，并且垂直动能的一部分进一步变成了水平的一部分。
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