陆架流穿越海峡的实验和数值研究

IF 2.2 3区 地球科学 Q2 OCEANOGRAPHY
Joseph Kuehl, Vitalii A. Sheremet
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引用次数: 0

摘要

受斯科舍陆架交叉现象的启发,研究了被海峡阻断的陆架流问题。在一个旋转水槽中进行的实验室实验证实,在平坦和倾斜的大陆架上,气流受水深轮廓线的引导,主要环绕海湾流动。正如早期理论所认为的那样,为了跃过海峡,气流必须具有不切实际的高罗斯比数。然而,近底摩擦力放松了测深约束,导致形成了斜向穿越海峡的奇特射流。在消散值为一半流体环绕海湾,一半流体斜向穿过海峡时,斜向交叉射流最为明显。摩擦参数实际值的数值解重现了实验室实验的结果,对缅因湾实际水深的考虑重现了与漂移轨迹和卫星得出的海面温度场观测到的模式相似的模式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental and numerical investigation of shelf flow crossing over a strait

Experimental and numerical investigation of shelf flow crossing over a strait

Motivated by the phenomenon of Scotian Shelf Crossover events, the problem of a shelf flow that is interrupted by a strait is considered. Laboratory experiments in a rotating tank with barotropic and baroclinic flow over flat and sloping shelves confirm that the flow is steered by the bathymetric contours and mainly circumnavigates the gulf. In order to jump across the strait, as suggested by earlier theories, the flow must have unrealistically high Rossby numbers. However, the near bottom friction relaxes the bathymetric constraint and causes the formation of a peculiar jet crossing the strait diagonally. For the dissipation values such that a half of the transport goes around the gulf and half crosses the strait diagonally, the diagonal crossover jet becomes most evident. Numerical solutions for realistic values of the frictional parameter reproduce the results of the laboratory experiments and consideration of the actual Gulf of Maine bathymetry reproduces patterns similar to those observed by drift trajectories and in the satellite derived sea surface temperature fields.

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来源期刊
Ocean Dynamics
Ocean Dynamics 地学-海洋学
CiteScore
5.40
自引率
0.00%
发文量
37
审稿时长
6-12 weeks
期刊介绍: Ocean Dynamics is an international journal that aims to publish high-quality peer-reviewed articles in the following areas of research: Theoretical oceanography (new theoretical concepts that further system understanding with a strong view to applicability for operational or monitoring purposes); Computational oceanography (all aspects of ocean modeling and data analysis); Observational oceanography (new techniques or systematic approaches in measuring oceanic variables, including all aspects of monitoring the state of the ocean); Articles with an interdisciplinary character that encompass research in the fields of biological, chemical and physical oceanography are especially encouraged.
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