Decadal Variability in the North Atlantic Extra-Tropics: The Role of Coupling Between Atmospheric Blocking and the Atlantic Multidecadal Oscillation

该项目的目标是调查在多年代尺度上观测到的北大西洋热带外海洋-大气系统的协变的起源，特别强调大气中天气变率变化与海洋环流十年变率之间的相互作用。该团队将使用最先进的大气-海洋耦合气候模型模拟以及观测和再分析产品。该项目将提高我们对北大西洋大气阻塞的数十年变化的性质，伴随的大气环流模式，以及它们与大西洋数十年振荡（AMO）的关联的理解。通过研究两个非常不同的时间尺度上的变化，即大气中的天气到季节内变化和海洋中的年代际变化，这项研究将阐明大气阻塞的多年代际变化的起源，以及海洋对大气反馈所起作用的程度。因此，这项研究将揭示大气-海洋耦合在AMO变化中的作用。

The goal of this project to investigate the origin of the observed co-variability in the extra-tropical North Atlantic ocean-atmosphere system on multi-decadal timescales, with particular emphasis on the interaction between changes in weather variability in the atmosphere and decadal variability in ocean circulation. The team will use state-of-the-art coupled atmosphere-ocean climate model simulations, as well as observational and reanalysis products. This project will improve our understanding of the nature of the multidecadal variability in North Atlantic atmospheric blocking, accompanying atmospheric circulation patterns, and their association with the Atlantic Multidecadal Oscillation (AMO). By examining the variations on two very distinct timescales, i.e. synoptic to intra-seasonal in the atmosphere and decadal in the ocean, this research will clarify the origin of multi-decadal variability of atmospheric blocking, and the extent to which ocean-to-atmosphere feedbacks play a role. Thus this research will shed insights into the role of atmosphere-ocean coupleing in the variability of the AMO.