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

北大西洋温带地区的年代际变化：大气阻塞与大西洋数十年振荡之间的耦合作用

• 批准号: 1355339
• 负责人: Caroline Ummenhofer
• 金额: $ 50万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-03-15 至 2019-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1355339&HistoricalAwards=false
• 关键词: Decadal; Variability; North; Atlantic; Extra

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.

该项目的目的是调查在多年时间尺度上在热带热带北大西洋 - 大气系统中观察到的共变量性的起源海洋循环。该团队将使用最先进的耦合大气 - 海洋气候模型模型，以及观察和重新分析产品。该项目将提高我们对北大西洋大气阻塞，伴随大气环流模式的多年代变异性的性质的理解，以及它们与大西洋多年代振荡（AMO）的关联。通过检查两个非常不同的时间尺度的变化，即在大气中的天气和季节性和海洋中的衰落，这项研究将阐明大气阻滞多年多年变异性的起源反馈发挥作用。因此，这项研究将洞悉大气 - 海洋夫妇在AMO变异性中的作用。

项目成果

Meridional Gulf Stream Shifts Can Influence Wintertime Variability in the North Atlantic Storm Track and Greenland Blocking

• DOI: 10.1029/2018gl081087
• 发表时间: 2019-02
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: T. Joyce;Young‐Oh Kwon;H. Seo;C. Ummenhofer

Decadal predictability of North Atlantic blocking and the NAO

• DOI: 10.1038/s41612-020-0120-6
• 发表时间: 2020-06-03
• 期刊: NPJ CLIMATE AND ATMOSPHERIC SCIENCE
• 影响因子: 9
• 作者: Athanasiadis, Panos J.;Yeager, Stephen;Tibaldi, Stefano
• 通讯作者: Tibaldi, Stefano

North Atlantic Natural Variability Modulates Emergence of Widespread Greenland Melt in a Warming Climate

• DOI: 10.1029/2018gl079682
• 发表时间: 2018-09-16
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Hahn, L.;Ummenhofer, C. C.;Kwon, Y. -O.
• 通讯作者: Kwon, Y. -O.

The role of the subtropical North Atlantic water cycle in recent US extreme precipitation events

• DOI: 10.1007/s00382-017-3685-y
• 发表时间: 2018-02
• 期刊: Climate Dynamics
• 影响因子: 4.6
• 作者: Laifang Li;R. Schmitt;C. Ummenhofer

Tree-ring reconstructed May–June precipitation in the Caucasus since 1752 CE

• DOI: 10.1007/s00382-016-3010-1
• 发表时间: 2016-02
• 期刊: Climate Dynamics
• 影响因子: 4.6
• 作者: D. Martin‐Benito;C. Ummenhofer;N. Köse;H. Güner;N. Pederson