A stable Atlantic Meridional Overturning Circulation in a changing North Atlantic Ocean since the 1990s.
A stable Atlantic Meridional Overturning Circulation in a changing North Atlantic Ocean since the 1990s.
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20世纪90年代以来变化的北大西洋中稳定的大西洋经向翻转环流
DOI：
10.1126/sciadv.abc7836
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发表时间：
2020-11
期刊：
影响因子：
13.6
通讯作者：
Wang C
中科院分区：
文献类型：
--
作者：
Fu Y;Li F;Karstensen J;Wang C
In contrast to profound North Atlantic property changes, the AMOC was stable on decadal time scales over the past three decades. The Atlantic Meridional Overturning Circulation (AMOC) is crucially important to global climate. Model simulations suggest that the AMOC may have been weakening over decades. However, existing array-based AMOC observations are not long enough to capture multidecadal changes. Here, we use repeated hydrographic sections in the subtropical and subpolar North Atlantic, combined with an inverse model constrained using satellite altimetry, to jointly analyze AMOC and hydrographic changes over the past three decades. We show that the AMOC state in the past decade is not distinctly different from that in the 1990s in the North Atlantic, with a remarkably stable partition of the subpolar overturning occurring prominently in the eastern basins rather than in the Labrador Sea. In contrast, profound hydrographic and oxygen changes, particularly in the subpolar North Atlantic, are observed over the same period, suggesting a much higher decoupling between the AMOC and ocean interior property fields than previously thought.
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