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首页> 外文期刊>Journal of Physical Oceanography >Upscale Energy Transfer by the Vortical Mode and Internal Waves
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Upscale Energy Transfer by the Vortical Mode and Internal Waves

机译：通过涡旋模式和内波进行的高端能量传递

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摘要

Diapycnal mixing in the ocean is sporadic yet ubiquitous, leading to patches of mixing on a variety of scales. The adjustment of such mixed patches can lead to the formation of vortices and other small-scale geostrophic motions, which are thought to enhance lateral diffusivity. If vortices are densely populated, they can interact and merge, and upscale energy transfer can occur. Vortex interaction can also be modified by internal waves, thus impacting upscale transfer. Numerical experiments were used to study the effect of a large-scale near-inertial internal wave on a field of submesoscale vortices. While one might expect a vertical shear to limit the vertical scale of merging vortices, it was found that internal wave shear did not disrupt upscale energy transfer. Rather, under certain conditions, it enhanced upscale transfer by enhancing vortex vortex interaction. If vortices were so densely populated that they interacted even in the absence of a wave, adding a forced large-scale wave enhanced the existing upscale transfer. Results further suggest that continuous forcing by the main driving mechanism (either vortices or internal waves) is necessary to maintain such upscale transfer. These findings could help to improve understanding of the direction of energy transfer in submesoscale oceanic processes.
机译：海洋中的硬藻混mixing是零星的，但无处不在，导致各种规模的混mixing。这种混合斑块的调整会导致形成涡旋和其他小规模的地转运动，这些运动被认为会增强横向扩散性。如果涡流密集，它们可以相互作用并合并，并且可能发生高级能量传递。涡旋相互作用也可以通过内部波来改变，从而影响高端转换。数值实验被用来研究大尺度近惯性内波对亚中尺度涡旋场的影响。尽管人们可能期望垂直切变会限制合并涡流的垂直尺度，但人们发现内部波切变并不会破坏高端能量传递。相反，在某些条件下，它通过增强涡旋相互作用来增强高端转移。如果涡流如此密集，甚至在没有波浪的情况下它们也会相互作用，则添加强制的大规模波浪会增强现有的高层转移。结果进一步表明，由主要驱动机制（涡旋或内波）持续施加的力对于维持这种高层转移是必要的。这些发现可能有助于增进对亚中尺度海洋过程能量转移方向的理解。

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