Topographic waves in rectangular basins
Topographic waves in rectangular basins
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矩形盆地中的地形波
DOI：
10.1017/s0022112087003094
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发表时间：
1987
影响因子：
3.7
通讯作者：
K. Hutter
中科院分区：
文献类型：
--
作者：
T. Stocker;K. Hutter
利用Stocker&Hutter(1986,1987)的航道模型，在f平面上构造了具有可变但对称水深的矩形盆地中的地形波解。结果表明，在较窄的周期范围内，可以分辨出三种本征模，它们分别表现为局域结构、中尺度结构和整体结构。波动可以被捕获在拉长盆地的长边(沟槽模式)或末端(海湾模式)，或者观察到整个盆地的相位旋转(球状模式)。新的海湾模被解释为半无限大航道中地形波反射的共振。研究了矩形的纵横比和地形参数的变化对波浪周期的影响。
The channel model of Stocker & Hutter (1986, 1987) is used to construct topographic wave solutions in a rectangular basin on the f-plane with variable but symmetric bathymetry. We show that in a narrow period band three types of eigenmodes can be discerned which exhibit local, midscale and global structure, respectively. Wave motion can be trapped either at the long sides of the elongated basin (channel mode) or at the ends of it (bay mode) or alternatively, a basinwide phase rotation is observed (Ball mode). The new bay modes are explained as resonances of topographic wave reflection in a semi-infinite channel. The influence of the variation of the aspect ratio of the rectangle and the topography parameter on the wave periods is also investigated.