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Convection above the Labrador Continental Slope

机译:拉布拉多大陆坡上方的对流

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The Labrador Sea is one of the few regions of the World Ocean where deep convection takes place. Several moorings across the Labrador continental slope just north of Hamilton Bank show that convection does take place within the Labrador Current. Mixing above the lower Labrador slope is facilitated by the onshore along-isopycnal intrusions of low-potential-vorticity eddies that weaken the stratification, combined with baroclinic instability that sustains slanted mixing while restratifying the water column through horizontal fluxes. Above the shelf break, the Irminger seawater core is displaced onshore while the stratification weakens with the increase in isopycnal slope. The change in stratification is partially due to the onshore shift of the "classical" Labrador Current, baroclinic instability, and possibly slantwise convection.
机译:拉布拉多海是世界海洋中发生深度对流的少数地区之一。在汉密尔顿银行以北的拉布拉多大陆斜坡上的几处系泊表明,对流确实发生在拉布拉多洋流内。低电位涡旋沿陆上等向侵入侵入有利于拉布拉多低坡上方的混合,这削弱了分层作用,而斜压不稳定又维持了倾斜的混合,同时又通过水平通量重新定性了水柱。在架子断裂上方,艾明格(Irminger)海水核心移至岸上,而分层随着等渗坡度的增加而减弱。分层的变化部分归因于“经典”拉布拉多洋流的陆上偏移,斜压不稳定以及可能的倾斜对流。

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