DOI: 10.1175/JCLI-D-11-00468.1
Scopus记录号: 2-s2.0-84865090328
论文题名: Impact of the warming pattern on global energetics
作者: Deckers D.H. ; Von Storch J.-S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 15 起始页码: 5223
结束页码: 5240
语种: 英语
Scopus关键词: Diabatic forcing
; Eddy kinetic energy
; Fully-coupled
; Gas concentration
; Meridional temperature gradient
; Ocean general circulation models
; Static stability
; Surface meridional temperature gradient
; Surface warming
; Warming patterns
; Climate change
; Climate models
; Convergence of numerical methods
; Dynamics
; Kinetic energy
; Thermal gradients
; Tropics
; Troposphere
; Stability
; air temperature
; atmospheric dynamics
; atmospheric general circulation model
; climate change
; climate modeling
; greenhouse gas
; kinetic energy
; oceanic general circulation model
; temperature gradient
; warming
英文摘要: The warming pattern due to higher greenhouse gas concentrations is expected to affect the global atmospheric energetics mainly via changes in the (i) meridional temperature gradient and (ii) mean static stability. Changes in surface meridional temperature gradients have been previously regarded as the determining feature for the energetics response, but recent studies suggest that changes in mean static stability may be more relevant than previously thought. This study aims to determine the relative importance of these two effects by comparing the energetics responses due to different warming patterns using a fully coupled atmosphere- ocean general circulation model. By means of an additional diabatic forcing, experiments with different warming patterns are obtained: one with a 2xCO2-like pattern that validates the method, one with only the tropical upper-tropospheric warming, and one with only the high-latitude surface warming. The study's findings suggest that the dominant aspect of the warming pattern that alters the global atmospheric energetics is not its associated meridional temperature gradient changes, but the mean static stability changes. The tropical upper warming weakens the energetics by increasing the mean static stability, whereas the surface warming strengthens it by reducing the mean static stability. The combined 2xCO2-like response is dominated by the tropical upper-tropospheric warming effect, hence the weaker energetic activity. Eddy kinetic energy changes consistently, but the two opposite responses nearly cancel each other in the 2xCO2 case. Therefore, estimates of future changes in storminess may be particularly sensitive to the relative magnitude of the main features of the simulated warming pattern. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52296
Appears in Collections: 气候变化事实与影响
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作者单位: International Max Planck Research School on Earth System Modelling, Max Planck Institute for Meteorology, Hamburg, Germany; Max Planck Institute for Meteorology, Hamburg, Germany; Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
Recommended Citation:
Deckers D.H.,Von Storch J.-S.. Impact of the warming pattern on global energetics[J]. Journal of Climate,2012-01-01,25(15)