DOI: 10.1175/JCLI-D-13-00005.1
Scopus记录号: 2-s2.0-84888064298
论文题名: Observed scaling in clouds and precipitation and scale incognizance in regional to global atmospheric models
作者: O'Brien T.A. ; Li F. ; Collins W.D. ; Rauscher S.A. ; Ringler T.D. ; Taylor M. ; Hagos S.M. ; Leung L.R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 23 起始页码: 9313
结束页码: 9333
语种: 英语
Scopus关键词: Cloud parameterizations
; Convective parameterization
; General circulation model
; Model evaluation/performance
; Regional model
; Sub-grid scale process
; Climate models
; Experiments
; Parameterization
; Weather forecasting
; Precipitation (meteorology)
; atmospheric modeling
; convective cloud
; general circulation model
; parameterization
; precipitation (climatology)
; stratiform cloud
英文摘要: Observations of robust scaling behavior in clouds and precipitation are used to derive constraints on how partitioning of precipitation should change with model resolution. Analysis indicates that 90%-99% of stratiform precipitation should occur in clouds that are resolvable by contemporary climate models (e.g., with 200-km or finer grid spacing). Furthermore, this resolved fraction of stratiform precipitation should increase sharply with resolution, such that effectively all stratiform precipitation should be resolvable above scales of ~50 km. It is shown that the Community Atmosphere Model (CAM) and the Weather Research and Forecasting model (WRF) also exhibit the robust cloud and precipitation scaling behavior that is present in observations, yet the resolved fraction of stratiform precipitation actually decreases with increasing model resolution. A suite of experiments with multiple dynamical cores provides strong evidence that this "scale-incognizant" behavior originates in one of the CAM4 parameterizations. An additional set of sensitivity experiments rules out both convection parameterizations, and by a process of elimination these results implicate the stratiform cloud and precipitation parameterization. Tests with the CAM5 physics package show improvements in the resolution dependence of resolved cloud fraction and resolved stratiform precipitation fraction. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51530
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 94720, United States; University of California, Berkeley, Berkeley, CA, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Sandia National Laboratories, Albuquerque, NM, United States; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
O'Brien T.A.,Li F.,Collins W.D.,et al. Observed scaling in clouds and precipitation and scale incognizance in regional to global atmospheric models[J]. Journal of Climate,2013-01-01,26(23)