DOI: 10.1002/grl.50534
论文题名: Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable
作者: Deshayes J. ; Tréguier A.-M. ; Barnier B. ; Lecointre A. ; Sommer J.L. ; Molines J.-M. ; Penduff T. ; Bourdallé-Badie R. ; Drillet Y. ; Garric G. ; Benshila R. ; Madec G. ; Biastoch A. ; Böning C.W. ; Scheinert M. ; Coward A.C. ; Hirschi J.J.-M.
刊名: Geophysical Research Letters
ISSN: 0094-8839
EISSN: 1944-8570
出版年: 2013
卷: 40, 期: 12 起始页码: 3069
结束页码: 3073
语种: 英语
英文关键词: AMOC
; bistability
; freshwater
; modeling
Scopus关键词: AMOC
; Atlantic meridional overturning circulations
; Climate scenarios
; Deep-water formation
; freshwater
; Freshwater transports
; High resolution
; South Atlantic
; Climate models
; International trade
; Models
; Optical bistability
; Water
; Oceanography
; advection
; climate modeling
; deep water formation
; freshwater input
; hindcasting
; marine atmosphere
; meridional circulation
; overturn
; Atlantic Ocean
; Atlantic Ocean (North)
; Atlantic Ocean (South)
英文摘要: All climate models predict a freshening of the North Atlantic at high latitude that may induce an abrupt change of the Atlantic Meridional Overturning Circulation (hereafter AMOC) if it resides in the bistable regime, where both a strong and a weak state coexist. The latter remains uncertain as there is no consensus among observations and ocean reanalyses, where the AMOC is bistable, versus most climate models that reproduce a mono-stable strong AMOC. A series of four hindcast simulations of the global ocean at 1/12° resolution, which is presently unique, are used to diagnose freshwater transport by the AMOC in the South Atlantic, an indicator of AMOC bistability. In all simulations, the AMOC resides in the bistable regime: it exports freshwater southward in the South Atlantic, implying a positive salt advection feedback that would act to amplify a decreasing trend in subarctic deep water formation as projected in climate scenarios. Key Points Simulated AMOC freshwater transport in South Atlantic depends on resolution AMOC in high resolution hindcasts exports freshwater southward, on average AMOC freshwater export has large variability at intra-seasonal timescale ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880532654&doi=10.1002%2fgrl.50534&partnerID=40&md5=ca1b48f765d85215f117d88fe8137423
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6103
Appears in Collections: 气候减缓与适应
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作者单位: LMI ICEMASA, University of Cape Town, Department of Oceanography, Rondebosch 7701, South Africa
Recommended Citation:
Deshayes J.,Tréguier A.-M.,Barnier B.,et al. Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable[J]. Geophysical Research Letters,2013-01-01,40(12).