DOI: 10.1175/2011JCLI4246.1
Scopus记录号: 2-s2.0-84856975448
论文题名: Precise calculations of the existence of multiple AMOC equilibria in coupled climate models. Part II: Transient behavior
作者: Sijp W.P. ; England M.H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 1 起始页码: 299
结束页码: 306
语种: 英语
Scopus关键词: Analytical solutions
; Attraction basin
; Coupled climate model
; Coupled models
; Critical value
; Decay time
; Evolution equations
; General circulation model
; North Atlantic Deep Water
; Salinity
; Salt flux
; Surface flux
; Time dependent behavior
; Transient behavior
; Transient solutions
; Upper boundary
; Differential equations
; Fluxes
; Materials properties
; Salinity measurement
; Surface measurement
; Climate models
; accuracy assessment
; atmosphere-ocean coupling
; climate modeling
; meridional circulation
; North Atlantic Deep Water
; oceanic general circulation model
; precision
; salinity
; surface flux
; time dependent behavior
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: In Part I of this paper an evolution equation for the Atlantic salinity and the reverse cell strength in the North Atlantic Deep Water (NADW) OFF state was formulated. Here, an analytical solution to this equation is used to test its validity in the context of transient solutions. In this study several transient scenarios in the general circulation model are examined to determine the accuracy of the predictions made with the material in Part I. The authors also determine how well the basic premises of Part I hold throughout these transient behaviors. The unstable equilibria S̄ unst that mark the upper boundary of the OFF state attraction basin are elucidated by the time-dependent behavior shown here. Transient equilibration from one stableNADWOFF state to another in response to changes in the anomalous salt flux H is accurately described by the evolution equation. The theory also explains the distribution of decay times for the NADW OFF state around the maximum critical Atlantic surface flux. Exceedingly long collapse times in excess of 50 000 years are found for surface flux values slightly in excess of the critical value. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52599
Appears in Collections: 气候变化事实与影响
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作者单位: Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
Recommended Citation:
Sijp W.P.,England M.H.. Precise calculations of the existence of multiple AMOC equilibria in coupled climate models. Part II: Transient behavior[J]. Journal of Climate,2012-01-01,25(1)