Sensitivity of basinwide meridional overturning to diapycnal diffusion and remote wind forcing in an idealized Atlantic-Southern Ocean geometry
Sensitivity of basinwide meridional overturning to diapycnal diffusion and remote wind forcing in an idealized Atlantic-Southern Ocean geometry
复制标题
理想化的大西洋-南大洋几何形状中盆地范围内的经向翻转对底密扩散和远程风力强迫的敏感性
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发表时间：
2003
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影响因子：
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通讯作者：
Jeffery R. Scott
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文献类型：
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作者：
Barry A. Klinger;S. Drijfhout;J. Marotzke;Jeffery R. Scott
摘要 最近的数值实验表明，与北大西洋深水相关的经向翻转速率部分受到南大洋风应力的控制，其中区域的纬向周期性改变了水流的性质。在这里，作者解决了 Gnanadesikan 的立方尺度关系，找到了一个简单的子午倾覆表达式，用于阐明风力分量的相对强度。将预测的倾覆与理想化大西洋-南大洋几何形状的粗分辨率数值实验进行比较。通过使用温度、盐度和“层厚度”的等密度扩散的水平模型，缩放准确地预测了对强迫实验的敏感性。层模型产生相似的结果，增加了对两个模型的数值的置信度。具有水平扩散率的水平模型实验具有相似的定性行为，但对强迫的敏感性略有不同。纸质高...
Abstract Recent numerical experiments indicate that the rate of meridional overturning associated with North Atlantic Deep Water is partially controlled by wind stress in the Southern Ocean, where the zonal periodicity of the domain alters the nature of the flow. Here, the authors solve the cubic scale relationship of Gnanadesikan to find a simple expression for meridional overturning that is used to clarify the relative strength of the wind-forced component. The predicted overturning is compared with coarse-resolution numerical experiments with an idealized Atlantic Ocean–Southern Ocean geometry. The scaling accurately predicts the sensitivity to forcing for experiments with a level model employing isopycnal diffusion of temperature, salinity, and “layer thickness.” A layer model produces similar results, increasing confidence in the numerics of both models. Level model experiments with horizontal diffusivity have similar qualitative behavior but somewhat different sensitivity to forcing. The paper highl...