Topographic ocean gyres : A western boundary slope
Topographic ocean gyres : A western boundary slope
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地形海洋环流：西边界斜坡
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
J. McWilliams
中科院分区：
文献类型：
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作者：
Atsushi Kubokawa;J. McWilliams
海洋环流模式的横向边界条件尚未确定。由于位涡度守恒的限制，大范围的海流无法上升到大陆坡。因此，电流可能永远不会与具有垂直壁的侧边界接触；然而，在一般环流模型的制定中，总是假定了侧边界。在真实情况下，与中纬度、风力驱动环流相关的西边界流可能位于大陆斜坡上。由于流函数倾向于遵循周围的位涡等高线，因此在斜坡上也会出现一个赤道尾形的环流。本文建立了以下三种情况的线性正压理论：1)带瑞利摩擦的准地转模型，2)带侧向黏度的准地转模型，3)带瑞利摩擦的赤道β平面模型。这些可以是……
Abstract The appropriate lateral boundary condition for an oceanic general circulation model is not yet well determined. A large-scale current is inhibited from ascending the continental slope because of the restriction of the potential vorticity conservation. As a consequence the current may never be in contact with a side boundary that has vertical walls; nevertheless, side boundaries have always been assumed in the formulation of general circulation models. In the true situation the western boundary current associated with a midlatitude, wind-driven gyre may be located on the continental slope. Since the streamfunction tends to follow the ambient potential vorticity contours, there will be an equatorward tail to the gyre that also occurs on the slope. Here a linear barotropic theory is developed for the following three cases: 1) a quasigeostrophic model with Rayleigh friction, 2) a quasigeostrophic model with lateral viscosity, and 3) an equatorial β-plane model with Rayleigh friction. These can be vie...