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首页> 外文期刊>Journal of Physical Oceanography >Estuarine Exchange Flow Is Related to Mixing through the Salinity Variance Budget
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Estuarine Exchange Flow Is Related to Mixing through the Salinity Variance Budget

机译：河口交换流量与盐分差异预算的混合有关

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摘要

The relationship between net mixing and the estuarine exchange flow may be quantified using a salinity variance budget. Here "mixing'' is defined as the rate of destruction of volume-integrated salinity variance, and the exchange flow is quantified using the total exchange flow. These concepts are explored using an idealized 3D model estuary. It is shown that in steady state (e.g., averaging over the spring-neap cycle) the volume-integrated mixing is approximately given by Mixing congruent to S(in)S(out)Q(r), where S-in and S-out are the representative salinities of in- and outflowing layers at the mouth and Q(r) is the river volume flux. This relationship provides an extension of the familiar Knudsen relation, in which the exchange flow is diagnosed based on knowledge of these same three quantities, quantitatively linking mixing to the exchange flow.
机译：净混合与河口交换流量之间的关系可以使用盐度差异预算来量化。这里的“混合”定义为体积积分盐度方差的破坏率，并使用总交换流量对交换流量进行量化。这些概念是通过理想化的3D模型河口进行探索的。例如，在整个春季小睡周期中取平均值），体积积分混合近似等于S（in）S（out）Q（r）的混合，其中S-in和S-out是in-的代表性盐度。流量为Q（r）是河流的流量通量，这种关系提供了一种熟悉的克努森关系的扩展，其中基于这三个量的知识诊断交换流量，定量地将混合与交换联系在一起流。

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