Inertial Taylor columns on a beta plane
Inertial Taylor columns on a beta plane
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beta 平面上的惯性泰勒柱
DOI：
10.1017/s0022112075000699
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发表时间：
1975
影响因子：
3.7
通讯作者：
M. Mccartney
中科院分区：
文献类型：
--
作者：
M. Mccartney
本文研究了具有中等分层的两层流体中，可变科里奥利参数对惯性泰勒柱形成的影响。得到了惯性、准地转、β平面方程的解析解。作为特殊情况，也得到了单层均匀流体的解。当两个层速度都是逆行的（向西）时，β的作用是限制由于隆起引起的扰动的水平范围。当两个层的速度都很接近（向东）时，在凸起的下游发现了一个广泛的弯曲尾流。与这种尾流相关联的可能是大的静止气旋和反气旋涡流。两个层中的曲折幅度通常几乎相同。在逆行和逆行的情况下，在隆起上方的流动的扰动的强度是在上层小于较低的，这表明在垂直衰减由于分层。在逆流情况下，解由于可能存在一个定常斜压波而变得复杂，这种波甚至在β = 0时也会存在。在形成弯曲尾流的所有情况下，凸块上都存在波阻力。文中还介绍了与单层溶液相对应的一些实验室实验。
The effect of variable Coriolis parameter on the formation of inertial Taylor columns is determined for the case of a two-layer fluid with moderate stratification. Analytic solutions of the inertial, quasi-geostrophic, β-plane equations are obtained. As a special case, sohtions corresponding to a single-layer, homo-geneous fluid are also obtained. When both layer velocities are retrograde (westward), the effect of β is to limit the horizontal extent of the disturbance due to the bump. When both layer velocities are prograde (eastward), an extensive meandering wake is found downstream of the bump. Associated with this wake can be large stationary cyclonic and anti-cyclonic eddies. The meander amplitudes in the two layers are typically nearly the same. I n both the retrograde and prograde cases, the strength of the disturbance to the flow above the bump is less in the upper layer compared with the lower, indicating an attenuation in the vertical due to stratification. For a counter-flow situation, the solutions are complicated by the possibility of a stationary baroclinic wave, one that would exist even for β = 0. In all the situations in which a meandering wake is formed, there is a wave-drag force on the bump. Some laboratory experiments corres- ponding to the single-layer solutions are described.