Simulated decadal variability of the meridional overturning circulation across the A25‐Ovide section
Simulated decadal variability of the meridional overturning circulation across the A25‐Ovide section
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模拟 A25-Ovide 剖面经向翻转环流的年代际变化
DOI：
10.1029/2012jc008342
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发表时间：
2013
影响因子：
--
通讯作者：
H. Mercier
中科院分区：
文献类型：
--
作者：
D. Desbruyères;V. Thierry;H. Mercier
高纬度（12 Sv，1 Sv = 106 m3 s-1）和副极地环流内部的一个环流圈（4Sv）。MOC的年代际变化与北大西洋海流（NAC）内副热带和副极地流入的同步输送变化有关。MOC强度的变化还与高层水平输送分布的变化有关。当MOC处于强阶段时（20世纪90年代初），NAC在冰岛盆地的北方分支较强，而在罗科尔海槽入口处的南方分支相对较弱。相反的情况适用于持续的弱MOC状态（20世纪70年代）。与早期研究的结论相反，副极地环流的强度和形状的变化并不是NAC结构变化的主要驱动力，这在很大程度上是由副热带流入的水平变化引起的。此外，最近显示的亚热带沃茨侵入东北大西洋（20世纪60年代末，80年代初和21世纪初）主要发生在A25-Ovide的弱MOC环流期间。
andhighlatitudes(12Sv,1Sv=10 6 m 3 s –1 ) and a cellinternal to the subpolar gyre(4Sv). The decadal MOC variability is associated with synchronized transport changes of the subtropical and subpolar inflow within the North Atlantic Current (NAC). The varying strength of the MOC is further related to changes in the upper horizontal transport distribution. When the MOC is in a strong phase (early 1990s), the northern branch of the NAC in the Iceland Basin is strong while the southern branch at the Rockall Trough entrance is relatively weak. The inverse situation holds for a persistent weak MOC state (1970s). Contrary to the conclusions of earlier studies, variability in the strength and shape of the subpolar gyre does not stand as the main driver of the changing NAC structure, which is largely induced by the horizontal variability of the subtropical inflow. Additionally, the recently shown intrusion of subtropical waters into the northeastern Atlantic (late 1960s, early 1980s, and 2000s) are shown to primarily occur during periods of weak MOC circulation at A25-Ovide.
影响因子：
5.2
作者：
Bingham, Rory J.;Hughes, Chris W.;Williams, Richard G.
通讯作者：
Williams, Richard G.