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首页> 外文期刊>Annual review of marine science >The Atlantic Meridional Overturning Circulation and Abrupt Climate Change
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The Atlantic Meridional Overturning Circulation and Abrupt Climate Change

机译:大西洋的经络倾覆流通和突然的气候变化

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摘要

Abrupt changes in climate have occurred in many locations around the globe over the last glacial cycle, with pronounced temperature swings on timescales of decades or less in the North Atlantic. The global pattern of these changes suggests that they reflect variability in the Atlantic meridional overturning circulation (AMOC). This review examines the evidence from ocean sediments for ocean circulation change over these abrupt events. The evidence for changes in the strength and structure of the AMOC associated with the Younger Dryas and many of the Heinrich events is strong. Although it has been difficult to directly document changes in the AMOC over the relatively short Dansgaard-Oeschger events, there is recent evidence supporting AMOC changes over most of these oscillations as well. The lack of direct evidence for circulation changes over the shortest events leaves open the possibility of other driving mechanisms for millennial-scale climate variability.
机译:在最后一个冰川周期,全球各地的许多地方发生了突然发生的气候变化,在北大西洋的数十年或更低数十年或更小的时间挥动的明显温度波动。 这些变化的全球模式表明,它们反映了大西洋经络翻转流通(AMOC)的可变性。 本综述审查了来自这些突发事件的海洋循环变化的海洋沉积物的证据。 与年幼道德拉斯和许多海因里希事件相关的武器实力和结构变化的证据强劲。 虽然在相对较短的Dansgaard-OESCHGER事件中,难以直接对amoc的变化,但最近有证据支持AMOC在大部分振荡中的变化。 在最短的事件中缺乏流通变化的直接证据留下了其他驱动机制的可能性,以实现千禧一代的气候变化。

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