DOI: 10.1175/JCLI-D-12-00292.1
Scopus记录号: 2-s2.0-84878990837
论文题名: Evaluation of weather noise and its role in climate model simulations
作者: Chen H. ; Schneider E.K. ; Kirtman B.P. ; Colfescu I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 11 起始页码: 3766
结束页码: 3784
语种: 英语
Scopus关键词: Climate model simulations
; Community climate system model
; Coupled atmosphere ocean general circulation model
; Destructive interference
; Dynamical downscaling
; General circulation model
; Intrinsic differences
; Regression estimates
; Climate models
; Experiments
; Sea ice
; Computer simulation
; atmospheric general circulation model
; atmospheric modeling
; climate modeling
; computer simulation
; downscaling
; noise
; oceanic general circulation model
; sea ice
; sea surface temperature
英文摘要: The relationship between coupled atmosphere-ocean general circulation model simulations and uncoupled simulations made with specified SST and sea ice is investigated using the Community Climate System Model, version 3. Experiments are carried out in a perfect model framework. Two closely related questions are investigated: 1) whether the statistics of the atmospheric weather noise in the atmospheric model are the same as in the coupled model, and 2) whether the atmospheric model reproduces the SST-forced response of the coupled model. The weather noise in both the coupled and uncoupled simulations is found by removing the forced response, as determined from the uncoupled ensemble, from the atmospheric field. The weather-noise variance is generally not distinguishable between the coupled and uncoupled simulations. However, variances of the total fields differ between the coupled and uncoupled simulations, since there is constructive or destructive interference between the SST-forced response and weather noise in the coupled model but no correlation between the SST-forced and weather-noise components in the uncoupled model simulations. Direct regression estimates of the forced response show little difference between the coupled and uncoupled simulations. Differences in local correlations are explained by weather noise because weather noise forces SST in the coupled simulation only. The results demonstrate and explain an important intrinsic difference in precipitation statistics between the coupled and uncoupled simulations. This difference could have consequences for the design of dynamical downscaling experiments and for tuning general circulation models. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51836
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, Calverton, MD, United States; Division of Meteorology and Physical Oceanography, Rosenstiel School for Atmospheric and Marine Science, University of Miami, Miami, FL, United States
Recommended Citation:
Chen H.,Schneider E.K.,Kirtman B.P.,et al. Evaluation of weather noise and its role in climate model simulations[J]. Journal of Climate,2013-01-01,26(11)