DOI: 10.1175/JCLI-D-11-00503.1
Scopus记录号: 2-s2.0-84865075822
论文题名: Southeast Pacific stratocumulus in the community atmosphere model
作者: Medeiros B. ; Williamson D.L. ; Hannay C. ; Olson J.G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 18 起始页码: 6175
结束页码: 6192
语种: 英语
Scopus关键词: Marine boundary layers
; Model evaluation
; Parameterizations
; Stratiform clouds
; Subtropics
; Boundary layers
; Clouds
; Errors
; Parameterization
; Climate models
; atmospheric modeling
; atmospheric structure
; boundary layer
; computer simulation
; error analysis
; parameterization
; stratocumulus
; subtropical region
; water budget
; wind
; Pacific Ocean
; Pacific Ocean (Southeast)
英文摘要: Forecasts of October 2006 are used to investigate southeast Pacific stratocumulus in the Community Atmosphere Model, versions 4 and 5 (CAM4 and CAM5). Both models quickly develop biases similar to their climatic biases, suggesting that parameterized physics are the root of the climate errors. An extensive cloud deck is produced in CAM4, but the cloud structure is unrealistic because the boundary layer is too shallow and moist. The boundary layer structure is improved inCAM5, but during the daytime the boundary layer decouples from the cloud layer, causing the cloud layer to break up and transition toward a more trade wind cumulus structure in the afternoon. The cloud liquid water budget shows how different parameterizations contribute to maintaining these different expressions of stratocumulus. Sensitivity experiments help elucidate the origins of the errors. The importance of the diurnal cycle of these clouds for climate simulations is emphasized. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52275
Appears in Collections: 气候变化事实与影响
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Medeiros B.,Williamson D.L.,Hannay C.,et al. Southeast Pacific stratocumulus in the community atmosphere model[J]. Journal of Climate,2012-01-01,25(18)