Biastoch Arne, Durgadoo Jonathan V, Morrison Adele K, van Sebille Erik, Weijer Wilbert, Griffies Stephen M
GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany.
Atmospheric and Oceanic Sciences Program, Princeton University, 300 Forrestal Road, Princeton, New Jersey 08544, USA.
Nat Commun. 2015 Dec 10;6:10082. doi: 10.1038/ncomms10082.
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.
印度洋和大西洋之间的海水跨洋输送,即“厄加勒斯泄漏”,构成了全球海洋翻转环流的一个瓶颈点。在此,我们将一系列高分辨率海洋和气候模型的输出结果与现场观测和卫星观测相结合,构建了1870年至2014年期间厄加勒斯泄漏的时间序列。该时间序列展示了南半球西风在年代际时间尺度上的影响。厄加勒斯泄漏在多年代时间尺度上与大西洋多年代振荡存在相关性;前者领先15年。这与北大西洋的气候相关。