DOI: 10.1175/JCLI-D-12-00374.1
Scopus记录号: 2-s2.0-84878130371
论文题名: A comparison of CMIP3 simulations of precipitation over north america with observations: Daily statistics and circulation features accompanying extreme events
作者: DeAngelis A.M. ; Broccoli A.J. ; Decker S.G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 10 起始页码: 3209
结束页码: 3230
语种: 英语
Scopus关键词: Atmospheric circulation
; Atmospheric dynamics and thermodynamics
; Climate model simulations
; Convective precipitation
; Coupled Model Intercomparison Project
; Extreme precipitation
; Extreme precipitation events
; Large-scale circulation
; Climate models
; Climatology
; Models
; Precipitation (meteorology)
; Thermodynamics
; Lasers
; atmospheric circulation
; atmospheric dynamics
; climate modeling
; extreme event
; precipitation (climatology)
; statistical analysis
; thermodynamics
; North America
英文摘要: Climate model simulations of daily precipitation statistics from the third phase of the Coupled Model Intercomparison Project (CMIP3) were evaluated against precipitation observations from North America over the period 1979-99. The evaluation revealed that the models underestimate the intensity of heavy and extreme precipitation along the Pacific coast, southeastern United States, and southernMexico, and these biases are robust among themodels. Themodels also overestimate the intensity of light precipitation events overmuch of NorthAmerica, resulting in fairly realisticmean precipitation inmany places. In contrast, heavy precipitation is simulated realistically over northern and eastern Canada, as is the seasonal cycle of heavy precipitation over a majority of North America. An evaluation of the simulated atmospheric dynamics and thermodynamics associatedwith extreme precipitation events was also conducted using the NorthAmericanRegionalReanalysis (NARR). The models were found to capture the large-scale physical mechanisms that generate extreme precipitation realistically, although they tend to overestimate the strength of the associated atmospheric circulation features. This suggests that climate model deficiencies such as insufficient spatial resolution, inadequate representation of convective precipitation, and overly smoothed topography may be more important for biases in simulated heavy precipitation than errors in the large-scale circulation during extreme events. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51933
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
Recommended Citation:
DeAngelis A.M.,Broccoli A.J.,Decker S.G.. A comparison of CMIP3 simulations of precipitation over north america with observations: Daily statistics and circulation features accompanying extreme events[J]. Journal of Climate,2013-01-01,26(10)