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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Modelling processes influencing shelf edge exchange of water and suspended sediment
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Modelling processes influencing shelf edge exchange of water and suspended sediment

机译：影响水和悬浮沉积物架子边缘交换的建模过程

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The major processes, and the associated models, which describe shelf edge exchange, and across-shelf movement of suspended sediment are briefly reviewed, and illustrated using results from numerical models and references to the literature. The across-shelf exchange of sediment due to internal tide, along-shelf flow, wind and wind wave effects (primarily swell) is examined. Calculations show the importance of the internal tide in suspending sediment at the shelf edge with wind waves influencing the nearshore suspension, and wind driven flows leading to sediment advection.Barotropic and baroclinic processes in shelf edge regions lead to significant meanders and eddy generation, and associated exchange. This is briefly discussed with reference to the recent literature, and illustrated in terms of barotropic instability. The role of eddies in transporting suspended sediment is briefly discussed and illustrated in the case of an isolated eddy.Ocean-shelf water exchange due to dense overflows (cascading) is described, and the role of entrainment and small-scale topography upon this process is illustrated in a number of calculations, The influence of large-scale topography, namely submarine canyons upon the movement of dense water bottom plumes into the ocean and the resulting eddies is briefly discussed and illustrated with reference to the recent literature.Future modelling involving shelf-ocean models with irregular grids and non-hydrostatic capabilities is suggested as an important development topic. (c) 2005 Elsevier Ltd. All rights reserved.
机译：简要回顾了主要过程和相关模型，这些过程描述了架子边缘交换以及悬浮沉积物的跨架移动，并使用数值模型的结果和参考文献进行了说明。考察了由于内部潮汐，沿架流，风和风浪效应（主要是膨胀）而引起的跨架沉积物交换。计算结果表明，内部潮汐对于在陆架边缘悬浮沉积物的重要性非常重要，风浪影响近岸悬浮物，而风驱动的流动导致沉积物平流。在陆架边缘区域的嗜温和斜压作用过程会导致明显的曲折和涡流产生，并与之相关交换。参考最新文献对此进行了简要讨论，并以正压不稳定性进行了说明。对涡流在悬浮涡流中的作用进行了简要的讨论和说明，并描述了由于密集溢流（级联）引起的海洋-陆架水交换，以及在此过程中夹带和小规模地形的作用。在大量计算中进行了举例说明，并参考了最近的文献简要讨论并说明了大规模地形（即海底峡谷）对稠密的水底羽流向海洋运动及其产生的涡流的影响。具有不规则网格和非静水能力的海洋模型被建议作为重要的发展主题。 （c）2005 Elsevier Ltd.保留所有权利。

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