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Annual Review of Marine Science The Bottom Boundary Layer

机译:海洋科学年度审查底部边界层

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摘要

The oceanic bottom boundary layer extracts energy and momentum from the overlying flow, mediates the fate of near-bottom substances, and generates bedforms that retard the flow and affect benthic processes. The bottom boundary layer is forced by winds, waves, tides, and buoyancy and is influenced by surface waves, internal waves, and stratification by heat, salt, and suspended sediments. This review focuses on the coastal ocean. The main points are that (a) classical turbulence concepts and modern turbulence parameterizations provide accurate representations of the structure and turbulent fluxes under conditions in which the underlying assumptions hold, (b) modern sensors and analyses enable high-quality direct or near-direct measurements of the turbulent fluxes and dissipation rates, and (c) the remaining challenges include the interaction of waves and currents with the erodible seabed, the impact of layer-scale two- and three-dimensional instabilities, and the role of the bottom boundary layer in shelf-slope exchange.
机译:海底边界层从上覆流中提取能量和动量,介导近底物质的命运,产生延迟流动并影响底栖工艺的弯曲机构。底部边界层被风,波,潮汐和浮力强制,受到表面波,内波和通过热,盐和悬浮沉积物分层的影响。这篇评论重点是沿海海洋。主要点是(a)经典的湍流概念和现代湍流参数化在潜在的假设保持(b)现代传感器和分析能够实现高质量的直接或接近直接测量的条件下,提供了结构和湍流通量的准确表示湍流助熔剂和耗散速率,(c)剩余的挑战包括波浪和电流与易于海底的相互作用,层尺度的两个和三维不稳定性的影响,以及底部边界层的作用货架斜坡交换。

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