A simple linear model of the depth dependence of the wind-driven variability of the Meridional Overturning Circulation
A simple linear model of the depth dependence of the wind-driven variability of the Meridional Overturning Circulation
复制标题
经向翻转环流风驱动变化的深度依赖性的简单线性模型
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
P. Killworth
中科院分区：
文献类型：
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作者：
P. Killworth
由时变风驱动的经向翻转环流部分通常被假设为混合层内的埃克曼通量，以及下方的深度和横向独立的回流。对于简单的线性摩擦海洋模型，研究了几天到几十年的频率范围内的回流。结果表明，虽然回流的东西向积分通常（但并非总是）几乎与深度无关，但回流的空间分布随水平和垂直位置的变化而变化很大。这可能对向北热通量的计算产生重要影响，传统上假设回流是空间均匀的。
The part of the meridional overturning circulation driven by time-varying winds is usually assumed to be an Ekman flux within a mixed layer, and a depth- and laterally independent return flow beneath. For a simple linear frictional ocean model, the return flow is studied for a range of frequencies from several days to decades. It is shown that while the east–west integral of the return flow is usually, but not always, almost independent of depth, the spatial distribution of the return flow varies strongly with both horizontal and vertical position. This can have important consequences for calculations of the northward heat flux, which traditionally assumes a spatially uniform return flow.