Atlantic deep circulation controlled by freshening in the Southern Ocean
Atlantic deep circulation controlled by freshening in the Southern Ocean
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大西洋深层环流受南大洋淡水清新控制
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
A. Schmittner
中科院分区：
文献类型：
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作者：
O. Saenko;A. Weaver;A. Schmittner
本文采用中等复杂气候模式进行数值模拟，分析了南半球中纬度经向水汽输送对大西洋经向翻转环流（MOC）和热输送的影响。该模式的一个新特点是在海洋中采用了一种双周期混合方案，它保证了斜斜的低扩散系数（约10−5 m2s−1）。结果表明，大西洋MOC、向北的海洋热输送及其相关的海气热通量异常都与南半球副热带向亚极地的南向水汽输送成正比。本文还分析了海洋环流增强对海表温度和盐度的影响。
Numerical simulations with a climate model of intermediate complexity are used to illustrate the effect of meridional moisture transport in the Southern Hemisphere mid‐latitudes on the meridional overturning circulation (MOC) and heat transport in the Atlantic. A novel feature of the model is a diapycnal mixing scheme in the ocean, which ensures low values of diffusivity (about 10−5 m2s−1) in the pycnocline. It is shown that the Atlantic MOC, northward oceanic heat transport and the associated air‐sea heat flux anomalies are all proportional to the southward moisture transport from subtropical to subpolar regions in the Southern Hemisphere. The effect of the intensified ocean circulation on sea surface temperature and salinity is also illustrated.