Internal wave generation by tidal flow over a sill in a rotating channel
Internal wave generation by tidal flow over a sill in a rotating channel
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DOI：
10.1029/2001jc001096
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发表时间：
2002-10
影响因子：
--
通讯作者：
K. Katsumata;T. Hibiya
中科院分区：
文献类型：
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作者：
K. Katsumata;T. Hibiya
[1]许多海峡并不狭窄到足以证明忽略地球自转的影响是正确的。本文导出了旋转通道中强潮-底相互作用产生的内波的解析解，阐明了地球自转对内波产生的影响。解决方案包括庞加莱波的频率高于频率的潮汐强迫，使即使当强迫频率是亚惯性，存在自由传播的庞加莱波。产生了Kelvin波和Poincare波。开尔文波的振幅比庞加莱波的振幅大得多，因此大部分激发的能量以开尔文波的形式传播离开基台。
[1] Many straits are not sufficiently narrow to justify neglecting the effect of the Earth's rotation. In the present study, analytic solutions are derived for the internal waves generated by strong tide-sill interaction in a rotating channel, and the effect of the Earth's rotation on the internal wave generation is clarified. Solutions include the Poincare waves with frequencies higher than the frequency of tidal forcing so that even when the forcing frequency is subinertial, there exist freely propagating Poincare waves. The Kelvin waves as well as the Poincare waves are generated. The amplitude of the Kelvin waves turns out to be much larger than that of the Poincare waves so that most of the excited energy propagates away from the sill in the form of the Kelvin waves.