DOI: 10.1175/JCLI-D-12-00234.1
Scopus记录号: 2-s2.0-84892523904
论文题名: Decadal evolution of ocean thermal anomalies in the north Atlantic: The effects of ekman, overturning, and horizontal transport
作者: Williams R.G. ; Roussenov V. ; Smith D. ; Lozier M.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 2 起始页码: 698
结束页码: 719
语种: 英语
Scopus关键词: Ekman transport
; Historical data
; Horizontal transport
; Meridional overturning circulations
; Ocean thermals
; Subpolar gyres
; Thermal anomalies
; Volume transport
; Climate models
; Climatology
; Oceanography
; air-sea interaction
; decadal variation
; Ekman transport
; gyre
; meridional circulation
; oceanic circulation
; overturn
; temperature anomaly
; warming
; wind stress
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Basin-scale thermal anomalies in the North Atlantic, extending to depths of 1-2km, are more pronounced than the background warming over the last 60 years.Adynamical analysis based on reanalyses of historical data from 1965 to 2000 suggests that these thermal anomalies are formed by ocean heat convergences, augmented by the poorly known air-sea fluxes. The heat convergence is separated into contributions from the horizontal circulation and the meridional overturning circulation (MOC), the latter further separated into Ekman and MOC transport minus Ekman transport (MOC-Ekman) cells. The subtropical thermal anomalies are mainly controlled by wind-induced changes in the Ekman heat convergence, while the subpolar thermal anomalies are controlled by the MOC-Ekman heat convergence; the horizontal heat convergence is generally weaker, only becoming significant within the subpolar gyre. These thermal anomalies often have an opposing sign between the subtropical and subpolar gyres, associatedwith opposing changes in themeridional volume transport driving the Ekman and MOC-Ekman heat convergences. These changes in gyre-scale convergences in heat transport are probably induced by the winds, as they correlate with the zonal wind stress at gyre boundaries. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51415
Appears in Collections: 气候变化事实与影响
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作者单位: School of environmental sciences, University of liverpool, Liverpool, United Kingdom; Hadley centre, Exeter, United Kingdom; Duke university, Durham, North Carolina, United Kingdom
Recommended Citation:
Williams R.G.,Roussenov V.,Smith D.,et al. Decadal evolution of ocean thermal anomalies in the north Atlantic: The effects of ekman, overturning, and horizontal transport[J]. Journal of Climate,2014-01-01,27(2)