Buoyancy-Driven Circulation in an Ocean Basin with Isopycnals Intersecting the Sloping Boundary
Buoyancy-Driven Circulation in an Ocean Basin with Isopycnals Intersecting the Sloping Boundary
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等密度线与倾斜边界相交的洋盆中浮力驱动的环流
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
P. Rhines
中科院分区：
文献类型：
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作者：
R. Hallberg;P. Rhines
翻译后摘要的动力学，管理传播的对流形成的水团在海洋中的倾斜边界检查使用等密度模型，允许层之间的界面相交的倾斜边界。这里提出的模拟使用一个两层的配置，以证明一些显着的差异，斜压强迫流之间的响应在一个盆地与平底和垂直的墙壁和一个更现实的盆地由倾斜的底部。每一层都有一个直接的强迫信号，该信号沿着该层的位涡（PV）等值线传播离开强迫。成对的、相反的边界流是由折射的地形Rossby波而不是Kelvin波产生的。不可能将气流分解成全球独立的斜压和正压模态;地形导致正压（即，深度平均）对浮力强迫的响应与斜压响应一样强。由于层PV轮廓线不均匀，
Abstract The dynamics that govern the spreading of a convectively formed water mass in an ocean with sloping boundaries are examined using an isopycnal model that permits the interface between the layers to intersect the sloping boundaries. The simulations presented here use a two-layer configuration to demonstrate some of the pronounced differences in a baroclinically forced flow between the response in a basin with a flat bottom and vertical walls and a more realistic basin bounded by a sloping bottom. Each layer has a directly forced signal that propagates away from the forcing along the potential vorticity (PV) contours of that layer. Paired, opposed boundary currents are generated by refracted topographic Rossby waves, rather than Kelvin waves. It is impossible to decompose the flow into globally independent baroclinic and barotropic modes; topography causes the barotropic (i.e., depth averaged) response to buoyancy forcing to be just as strong as the baroclinic response. Because layer PV contours di...