globalchange  > 气候变化与战略
DOI: 10.1038/s41561-021-00759-4
论文题名:
Distinct sources of interannual subtropical and subpolar Atlantic overturning variability
作者: Kostov Y.; Johnson H.L.; Marshall D.P.; Heimbach P.; Forget G.; Holliday N.P.; Lozier M.S.; Li F.; Pillar H.R.; Smith T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期:7
起始页码: 491
结束页码: 495
语种: 英语
英文关键词: annual variation ; global climate ; meridional circulation ; oceanic circulation ; overturn ; subtropical region ; surface wind ; wind stress ; Atlantic Ocean
英文摘要: The Atlantic meridional overturning circulation (AMOC) is pivotal for regional and global climate due to its key role in the uptake and redistribution of heat and carbon. Establishing the causes of historical variability in AMOC strength on different timescales can tell us how the circulation may respond to natural and anthropogenic changes at the ocean surface. However, understanding observed AMOC variability is challenging because the circulation is influenced by multiple factors that co-vary and whose overlapping impacts persist for years. Here we reconstruct and unambiguously attribute intermonthly and interannual AMOC variability at two observational arrays to the recent history of surface wind stress, temperature and salinity. We use a state-of-the-art technique that computes space- and time-varying sensitivity patterns of the AMOC strength with respect to multiple surface properties from a numerical ocean circulation model constrained by observations. While, on interannual timescales, AMOC variability at 26° N is overwhelmingly dominated by a linear response to local wind stress, overturning variability at subpolar latitudes is generated by the combined effects of wind stress and surface buoyancy anomalies. Our analysis provides a quantitative attribution of subpolar AMOC variability to temperature, salinity and wind anomalies at the ocean surface. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169775
Appears in Collections:气候变化与战略

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作者单位: Geography, University of Exeter, Exeter, United Kingdom; Earth Sciences, University of Oxford, Oxford, United Kingdom; Physics, University of Oxford, Oxford, United Kingdom; Oden Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX, United States; Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Institute for Geophysics, University of Texas at Austin, Austin, TX, United States; Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; National Oceanography Centre, Southampton, United Kingdom; Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States

Recommended Citation:
Kostov Y.,Johnson H.L.,Marshall D.P.,et al. Distinct sources of interannual subtropical and subpolar Atlantic overturning variability[J]. Nature Geoscience,2021-01-01,14(7)
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