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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Ocean heat transport in the South Atlantic in a coupled climate model
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Ocean heat transport in the South Atlantic in a coupled climate model

机译：耦合气候模型中南大西洋的海洋热传输

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Ocean heat transport in the South Atlantic of a coupled climate model has been diagnosed and compared with observational estimates. The coupled model overestimates the northward heat transport in the South Atlantic. This corresponds to an underestimate of the northward flux of bottom water across World Ocean Circulation Experiment (WOCE) section A11 (the model transports less than 1 Sv compared with climatological estimates of 6 Sv). The magnitude of the southward outflow of North Atlantic deep water agrees well with observational estimates while the northward flux of surface and intermediate waters is larger than observational estimates. We show that with the correct water mass properties a realistic northward Aux of bottom water across 30 degrees S is only possible, in the climate model, if the depths of the channels linking the Argentine and Brazil basins are properly represented. We find that an increase in the northward flow of bottom water corresponds to an increase in the southward flow of deep water, rather than a reduction in the northward flux of surface and intermediate waters. This indicates that the upper and lower limb of the overturning are decoupled in the model. As a consequence, increasing the northward transport of bottom water leads to a small reduction of the northward heat transport across 30 degrees S. The magnitude of the heat transport from the Indian to the Atlantic ocean in the model (the warm water path) is surprisingly large for a noneddy resolving model. We find that the magnitude of the Indonesian Throughflow is important in climate resolution models for determining the strength of the warm water path. However, the relative strengths of the warm and cold water paths do not significantly change the heat transported across 30 degrees S. [References: 44]
机译：已诊断出具有耦合气候模式的南大西洋海洋热传输，并将其与观测估计值进行了比较。耦合模型高估了南大西洋的北向热传输。这对应于穿过世界海洋环流实验（WOCE）A11部分的底水北向通量的低估（与6 Sv的气候估算相比，该模型的输运量小于1 Sv）。北大西洋深水向南流出的量与观测值非常吻合，而地表水和中间水的北向流量大于观测值。我们证明，在正确的水团性质下，如果正确表示了连接阿根廷和巴西盆地的河道深度，则只有在气候模型中，才可能在30°S处实现逼真的底部北向北Aux。我们发现，底部水向北流动的增加对应于深水向南流动的增加，而不是地表水和中间水向北流动的减少。这表明翻转的上肢和下肢在模型中是分离的。结果，增加底部水向北的传输会导致北向热传输在30 S上略有减少。在模型（暖水路径）中，从印度到大西洋的热传输量令人惊讶。对于非涡流解析模型而言较大。我们发现，印尼通流的大小在气候分辨率模型中对于确定暖水路径的强度很重要。但是，暖水路径和冷水路径的相对强度不会显着改变跨30度S传递的热量。[参考文献：44]

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