DOI: 10.1175/JCLI-D-12-00370.1
Scopus记录号: 2-s2.0-84878975558
论文题名: The modification of sea surface temperature anomaly linear damping time scales by stratocumulus clouds
作者: Evan A.T. ; Allen R.J. ; Bennartz R. ; Vimont D.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 11 起始页码: 3619
结束页码: 3630
语种: 英语
Scopus关键词: Coupled Model Intercomparison Project
; Newtonian cooling
; Persistent feature
; Sea surface temperature anomalies
; Spatial structure
; Stratocumulus clouds
; Surface temperatures
; Tropical atlantic
; Atmospheric temperature
; Clouds
; Damping
; Space applications
; Surface properties
; Tropics
; Time measurement
; atmospheric structure
; climate feedback
; climate modeling
; cloud cover
; observational method
; sea surface temperature
; stratocumulus
; temperature anomaly
; timescale
; Atlantic Ocean
; Atlantic Ocean (Tropical)
英文摘要: Stratocumulus (Sc) cloud cover is a persistent feature of the subtropical North and South Atlantic. It is well known that Sc cloud cover increases with decreasing temperatures of the underlying sea surface and that an increase in cloudcover will cool the surface temperatures via increasing the local albedo, otherwise known as the Sc feedback. In this study observations are used to quantify the magnitude and spatial structure of the Sc feedback in the tropical-extratropical Atlantic Ocean and investigate the role of the Sc feedback in shaping the evolution of coupled modes of variability there. The authors show that in the Atlantic the Sc feedback increases the time scales of Newtonian cooling by 40% and in an idealized linear model of the tropical Atlantic the dominant mode of coupled variability (the Atlantic meridional mode or dipole mode) would experience no transient growth without the influence of the Sc feedback on the surface temperature damping time scales. This study also investigates Atlantic Sc clouds and the Sc feedback in phase 3 of the Coupled Model Intercomparison Project (CMIP3) models. The authors find that most models have negative biases in the mean state of Sc cloud cover and do not reproduce the observed spatial structure of Atlantic Sc clouds. This study also shows that while the majority of models exhibit some agreement with observations in the meridional structure of the Sc feedback, the vast majority of models underestimate the dependence of Sc cloud cover on the underlying SST. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51865
Appears in Collections: 气候变化事实与影响
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作者单位: Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Earth Sciences, University of California, Riverside, Riverside, CA, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, United States
Recommended Citation:
Evan A.T.,Allen R.J.,Bennartz R.,et al. The modification of sea surface temperature anomaly linear damping time scales by stratocumulus clouds[J]. Journal of Climate,2013-01-01,26(11)