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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Multidecadal North Atlantic sea surface temperature and Atlantic meridional overturning circulation variability in CMIP5 historical simulations
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Multidecadal North Atlantic sea surface temperature and Atlantic meridional overturning circulation variability in CMIP5 historical simulations

机译：CMIP5历史模拟中的北大西洋多年代际海表温度和大西洋经向翻转环流变化

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摘要

[1] In this paper, simulated variability of the Atlantic Multidecadal Oscillation (AMO) and the Atlantic Meridional Overturning Circulation (AMOC) and their relationship has been investigated. For the first time, climate models of the Coupled Model Intercomparison Project phase 5 (CMIP5) provided to the Intergovernmental Panel on Climate Change Fifth Assessment Report (IPCC-AR5) in historical simulations have been used for this purpose. The models show the most energetic variability on the multidecadal timescale band both with respect to the AMO and AMOC, but with a large model spread in both amplitude and frequency. The relationship between the AMO and AMOC in most of the models resembles the delayed advective oscillation proposed for the AMOC on multidecadal timescales. A speed up (slow down) of the AMOC is in favor of generating a warm (cold) phase of the AMO by the anomalous northward (southward) heat transport in the upper ocean, which reversely leads to a weakening (strengthening) of the AMOC through changes in the meridional density gradient after a delayed time of ocean adjustment. This suggests that on multidecadal timescales the AMO and AMOC are related and interact with each other.
机译：[1]本文研究了大西洋多年代际振荡（AMO）和大西洋子午翻转环流（AMOC）的模拟变化及其关系。为此，首次在历史模拟中使用了提供给政府间气候变化专门委员会第五次评估报告（IPCC-AR5）的耦合模型比对项目第5阶段（CMIP5）的气候模型。这些模型显示了相对于AMO和AMOC而言，在多十年时间尺度带上的能量变化最大，但模型在幅度和频率上都有很大的扩展。在大多数模型中，AMO和AMOC之间的关系类似于在多年代尺度上为AMOC提出的延迟对流振荡。 AMOC的加速（减速）有利于通过上层海洋异常的北（南）向热传输产生AMO的暖（冷）相，这反过来导致AMOC的减弱（加强）。在海洋调整延迟后通过子午线密度梯度的变化。这表明，在数十年的时间尺度上，AMO和AMOC是相关的并且相互影响。

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