Testing the limits of quasi-geostrophic theory: application to observed laboratory flows outside the quasi-geostrophic regime
Testing the limits of quasi-geostrophic theory: application to observed laboratory flows outside the quasi-geostrophic regime
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测试准地转理论的极限：应用于准地转范围之外观测到的实验室流
DOI：
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发表时间：
2010
影响因子：
3.7
通讯作者：
T. Haine
中科院分区：
文献类型：
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作者：
P. Williams;P. Read;T. Haine
我们将旋转两层环带中平衡斜压波的实验室观察结果与准地转模型的数值模拟进行了比较。实验室实验远远超出了准地转范围：罗斯贝数达到一致；深宽比大；流体中含有地转惯性重力波。尽管在形式上不适用，准地转模型相当好地捕捉了实验室流动。该模型显示出一些系统偏差，这是其对边界层的处理和忽略界面表面张力的结果，并且可以在不调用中等罗斯贝数、大纵横比或惯性重力波的动力学效应的情况下进行解释。我们的结论是，准地转理论似乎继续在其正式范围之外适用。
We compare laboratory observations of equilibrated baroclinic waves in the rotating two-layer annulus, with numerical simulations from a quasi-geostrophic model. The laboratory experiments lie well outside the quasi-geostrophic regime: the Rossby number reaches unity; the depth-to-width aspect ratio is large; and the fluid contains ageostrophic inertia–gravity waves. Despite being formally inapplicable, the quasi-geostrophic model captures the laboratory flows reasonably well. The model displays several systematic biases, which are consequences of its treatment of boundary layers and neglect of interfacial surface tension and which may be explained without invoking the dynamical effects of the moderate Rossby number, large aspect ratio or inertia–gravity waves. We conclude that quasi-geostrophic theory appears to continue to apply well outside its formal bounds.
QUAGMIRE v1.3：用于研究旋转流体实验的准地转模型
影响因子：
5.1
作者：
Williams P
通讯作者：
Williams P