DOI: 10.1175/JCLI-D-13-00544.1
Scopus记录号: 2-s2.0-84926059673
论文题名: Comparison between observed and model-simulated atmospheric circulation patterns associated with extreme temperature days over North America using CMIP5 historical simulations
作者: Loikith P.C. ; Broccoli A.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 5 起始页码: 2063
结束页码: 2079
语种: 英语
Scopus关键词: Atmospheric temperature
; Climatology
; Conformal mapping
; Dynamics
; Meteorology
; Sea level
; Self organizing maps
; Atmospheric circulation
; Atmospheric circulation patterns
; Coupled atmosphere ocean general circulation model
; Coupled Model Intercomparison Project
; General circulation model
; Historical simulation
; North America
; Synoptic climatology
; Climate models
; air temperature
; air-sea interaction
; atmospheric circulation
; atmospheric general circulation model
; climate modeling
; oceanic general circulation model
; sea level pressure
; synoptic meteorology
; North America
英文摘要: Circulation patterns associated with extreme temperature days over North America, as simulated by a suite of climate models, are compared with those obtained from observations. The authors analyze 17 coupled atmosphere-ocean general circulation models contributing to the fifth phase of the Coupled Model Intercomparison Project. Circulation patterns are defined as composites of anomalies in sea level pressure and 500-hPa geopotential height concurrent with days in the tails of temperature distribution. Several metrics used to systematically describe circulation patterns associated with extreme temperature days are applied to both the observed and model-simulated data. Additionally, self-organizing maps are employed as a means of comparing observed and model-simulated circulation patterns across the North American domain. In general, the multimodel ensemble resembles the observed patterns well, especially in areas removed from complex geographic features (e.g., mountains and coastlines). Individual model results vary; however, the majority of models capture the major features observed. The multimodel ensemble captures several key features, including regional variations in the strength and orientation of atmospheric circulation patterns associated with extreme temperatures, both near the surface and aloft, as well as variations with latitude and season. The results from this work suggest that these models can be used to comprehensively examine the role that changes in atmospheric circulation will play in projected changes in temperature extremes because of future anthropogenic climate warming. © 2015 American Meteorological Society. 资助项目: DOE, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50711
Appears in Collections: 气候变化事实与影响
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Environmental Sciences, The State University of New Jersey, New Brunswick, NJ, United States
Recommended Citation:
Loikith P.C.,Broccoli A.J.. Comparison between observed and model-simulated atmospheric circulation patterns associated with extreme temperature days over North America using CMIP5 historical simulations[J]. Journal of Climate,2015-01-01,28(5)