Lateral friction in the oceans as an effect of potential vorticity mixing
Lateral friction in the oceans as an effect of potential vorticity mixing
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海洋中的横向摩擦是位涡混合的影响
DOI：
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发表时间：
1973
期刊：
影响因子：
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通讯作者：
P. Welander
中科院分区：
文献类型：
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作者：
P. Welander
将混合长度计算应用于位涡而不是动量，在海洋物质输运方程中出现了一种新的侧摩擦。这种摩擦的水平均匀，准地转湍流的特殊情况下进行评估。主要的影响是由所谓的β项产生的向西力。这就产生了额外的向南内陆输送和西部边界流的加强。湍流交换系数KH = 108 em2s−1足以使墨西哥湾流的输送量是经典斯维德鲁普模型的两倍。
Abstract Applying a mixing-length calculation to potential vorticity rather than to momentum a new type of lateral friction appears in the oceanic mass transport equations. This friction is evaluated for the special case of horizontally homogeneous, quasi-geostrophic turbulence. The main effect is a westward force arising from the so-called β-term. This produces an additional southward interior transport and a strengthening of the western boundary current. A turbulent exchange coefficient KH = 108 em2s−1 is sufficient to give a Gulf Stream transport twice that obtained by the classical Sverdrup model.