Meanders and Eddies from Topographic Transformation of Coastal-Trapped Waves
Meanders and Eddies from Topographic Transformation of Coastal-Trapped Waves
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DOI：
10.1175/jpo-d-12-0224.1
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发表时间：
2014-04
影响因子：
3.5
通讯作者：
J. Rodney;E. Johnson
中科院分区：
文献类型：
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作者：
J. Rodney;E. Johnson
摘要本文描述了地形变化如何将小振幅、线性、海岸陷波（CTW）转变为非线性波或涡列。 CTW 的色散关系取决于陆架的坡度。如果跨陆架坡度沿陆架变化足够慢，则 CTW 的局部结构会适应局部几何形状，并且可以通过 Wentzel-Kramers-Brillouin-Jeffreys (WKBJ) 方法分析波浪变换。参数空间的两个区域很简单：绝热透射（其中，在入射波频率下，沿着陆架的各处都存在长波）和短波反射（其中，架子上的某处在入射频率下不存在长波，但分层足够弱，短反射波可以与入射波共存）。本文给出了这两种情况的解决方案，但集中于第三个参数体系，其中包括所有足够强的分层流，其中这两个都不......
AbstractThis paper describes how topographic variations can transform a small-amplitude, linear, coastal-trapped wave (CTW) into a nonlinear wave or an eddy train. The dispersion relation for CTWs depends on the slope of the shelf. Provided the cross-shelf slope varies sufficiently slowly along the shelf, the local structure of the CTW adapts to the local geometry and the wave transformation can be analyzed by the Wentzel–Kramers–Brillouin–Jeffreys (WKBJ) method. Two regions of parameter space are straightforward: adiabatic transmission (where, at the incident wave frequency, a long wave exists everywhere along the shelf) and short-wave reflection (where somewhere on the shelf no long wave exists at the incident frequency, but the stratification is sufficiently weak that a short reflected wave can coexist with the incident wave). This paper gives the solutions for these two cases but concentrates on a third parameter regime, which includes all sufficiently strongly stratified flows, where neither of these...