DOI: 10.1175/JCLI-D-11-00228.1
Scopus记录号: 2-s2.0-84858257292
论文题名: A characterization of the present-day arctic atmosphere in CCSM4
作者: De Boer G. ; Chapman W. ; Kay J.E. ; Medeiros B. ; Shupe M.D. ; Vavrus S. ; Walsh J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 8 起始页码: 2676
结束页码: 2695
语种: 英语
Scopus关键词: All-sky
; Arctic
; Arctic atmosphere
; Atmospheric energy
; Cloud cover
; Community climate system model
; Coupled models
; Data sets
; Ecmwf re-analysis
; Energy budgets
; Global precipitation climatology projects
; Ice water paths
; Key feature
; Liquid water paths
; Low cloud cover
; Lower troposphere
; Model evaluation
; Reanalysis
; Sea level pressure
; Seasonal variability
; Spatial patterns
; Summer months
; Surface air temperatures
; Surface flux
; Temporal variability
; Top of the atmospheres
; Atmospheric temperature
; Atmospherics
; Budget control
; Climate models
; Clouds
; Estimation
; Evaporation
; Phase transitions
; Sea level
; Troposphere
; Upper atmosphere
; Computer simulation
; air temperature
; climate modeling
; cloud cover
; energy budget
; evaporation
; precipitation (climatology)
; sea level pressure
; seasonal variation
; spatial variation
; surface flux
; temporal variation
; troposphere
; Arctic
英文摘要: Simulation of key features of the Arctic atmosphere in the Community Climate System Model, version 4 (CCSM4) is evaluated against observational and reanalysis datasets for the present-day (1981-2005). Surface air temperature, sea level pressure, cloud cover and phase, precipitation and evaporation, the atmospheric energy budget, and lower-tropospheric stability are evaluated. Simulated surface air temperatures are found to be slightly too cold when compared with the 40-yr ECMWF Re-Analysis (ERA-40). Spatial patterns and temporal variability are well simulated. Evaluation of the sea level pressure demonstrates some large biases, most noticeably an under simulation of the Beaufort High during spring and autumn. Monthly Arctic-wide biases of up to 13 mb are reported. Cloud cover is underpredicted for all but summer months, and cloud phase is demonstrated to be different from observations. Despite low cloud cover, simulated all-sky liquid water paths are too high, while ice water path was generally too low. Precipitation is found to be excessive over much of the Arctic compared to ERA-40 and the Global Precipitation Climatology Project (GPCP) estimates. With some exceptions, evaporation is well captured by CCSM4, resulting in P - E estimates that are too high. CCSM4 energy budget terms show promising agreement with estimates from several sources. The most noticeable exception to this is the top of the atmosphere (TOA) fluxes that are found to be too low while surface fluxes are found to be too high during summer months. Finally, the lower troposphere is found to be too stable when compared to ERA-40 during all times of year but particularly during spring and summer months. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52441
Appears in Collections: 气候变化事实与影响
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作者单位: Lawrence Berkeley National Laboratory, Berkeley, CA, United States; California and Cooperative Institute for Research in Environmental Sciences, NOAA/ESRL/PSD, Boulder, CO, United States; University of Illinois at Urbana-Champaign, Urbana, IL, United States; National Center for Atmospheric Research, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, and NOAA/ESRL/PSD, Boulder, CO, United States; University of Wisconsin-Madison, Madison, WI, United States; University of Alaska Fairbanks, Fairbanks, AL, United States
Recommended Citation:
De Boer G.,Chapman W.,Kay J.E.,et al. A characterization of the present-day arctic atmosphere in CCSM4[J]. Journal of Climate,2012-01-01,25(8)