Atlantic multi-decadal oscillation covaries with Agulhas leakage.
Atlantic multi-decadal oscillation covaries with Agulhas leakage.
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DOI：
10.1038/ncomms10082
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发表时间：
2015-12-10
影响因子：
16.6
通讯作者：
Griffies SM
中科院分区：
文献类型：
--
作者：
Biastoch A;Durgadoo JV;Morrison AK;van Sebille E;Weijer W;Griffies SM
印度洋和大西洋之间海水的跨洋转移，即“厄加勒斯泄漏”，形成了全球海洋翻转环流的阻塞点。在这里，通过将一系列高分辨率海洋和气候模型的输出与现场和卫星观测相结合，我们构建了 1870 年至 2014 年期间阿加勒斯泄漏的时间序列。该时间序列展示了南半球西风带对十年时间尺度的影响。厄加勒斯泄漏显示出与大西洋数十年振荡在数十年时间尺度上的相关性；前者领先15年。这与北大西洋的气候有关。由于其高度可变的时空性质和稀疏的观测，对安古拉斯泄漏的长期量化是困难的。在这里，作者将海面温度与一系列海洋和气候模型模拟结合起来，构建了 145 年的厄加勒斯泄漏长期序列。
The interoceanic transfer of seawater between the Indian Ocean and the Atlantic, ‘Agulhas leakage', forms a choke point for the overturning circulation in the global ocean. Here, by combining output from a series of high-resolution ocean and climate models with in situ and satellite observations, we construct a time series of Agulhas leakage for the period 1870–2014. The time series demonstrates the impact of Southern Hemisphere westerlies on decadal timescales. Agulhas leakage shows a correlation with the Atlantic Multi-decadal Oscillation on multi-decadal timescales; the former leading by 15 years. This is relevant for climate in the North Atlantic. The long-term quantification of the Angulas Leakage is difficult due to its highly variable spatio-temporal nature and sparse observations. Here, the authors combine sea surface temperature with a series of ocean and climate model simulations to construct a 145-year long time series of Agulhas leakage.