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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Upwelling relaxation and estuarine plumes
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Upwelling relaxation and estuarine plumes

机译：上升流和河口羽流

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After coastal upwelling, the water properties in the nearshore coastal region close to estuaries is determined by the race between the new estuarine plume traveling along the coast and the upwelled front (a marker for the old upwelled plume and the coastal pycnocline) returning to the coast under downwelling winds. Away from an estuary, downwelling winds can return the upwelled front to the coast bringing less dense water nearshore. Near the estuary, the estuarine plume can arrive along the coast and return less dense water to the nearshore region before the upwelled front returns to the coast. Where the plume brings less dense water to the coast first, the plume keeps the upwelled front from returning to the coast. In this region, only the plume and the anthropogenic input and larvae associated with the plume waters influence the nearshore after upwelling. We quantify the extent of the region where the plume is responsible for bringing less dense water to the nearshore and keeping the upwelled front from returning to the coast after upwelling. We successfully tested our predictions against numerical experiments and field observations of the Chesapeake plume near Duck, North Carolina. We argue that this alongshore region exists for other estuaries where the time‐integrated upwelling and downwelling wind stresses are comparable.
机译：沿海上升流之后，靠近河口的近岸沿海地区的水属性取决于沿海岸行进的新河口羽流和向上涌流的锋面（旧的向上涌流的羽流和沿海比诺克林的标志）之间的竞争。在倾盆大风下。远离河口，下风可以将上涌的锋面返回海岸，从而使近岸的水流减少。在河口附近，河口羽流可以沿着海岸到达，并在上涌的前沿返回海岸之前将密度较小的水返回到近岸区域。在羽流首先将较不稠密的水带入海岸的地方，羽流可防止上升流的锋面返回海岸。在该区域，上升流之后，只有羽状流以及与羽状水相关的人为输入和幼体会影响近岸。我们量化了羽流负责将较稀疏的水带到近岸并阻止上升流后的上升流锋返回海岸的区域范围。我们针对北卡罗来纳州达克附近切萨皮克羽的数值实验和现场观察成功地验证了我们的预测。我们认为该沿海地​​区存在于其他河口，其时间积分的上升和下降风压可比。

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