DOI: 10.1007/s00382-014-2093-9
Scopus记录号: 2-s2.0-84894796656
论文题名: Evaluation of clouds and radiative fluxes in the EC-Earth general circulation model
作者: Lacagnina C. ; Selten F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-09-10 起始页码: 2777
结束页码: 2796
语种: 英语
英文关键词: Cloud bias
; Cloud metrics
; EC-Earth
; Moist convection
; Radiative fluxes bias
英文摘要: Observations, mostly from the International Satellite Cloud Climatology (ISCCP), are used to assess clouds and radiative fluxes in the EC-Earth general circulation model, when forced by prescribed observed sea surface temperatures. An ISCCP instrument simulator is employed to consistently compare model outputs with satellite observations. The use of a satellite simulator is shown to be imperative for model evaluation. EC-Earth exhibits the largest cloud biases in the tropics. It generally underestimates the total cloud cover but overestimates the optically thick clouds, with the net result that clouds exert an overly strong cooling effect in the model. Every cloud type has its own source of bias. The magnitude of the cooling due to the shortwave cloud radiative effect (∣SWCRE∣) is underestimated for the stratiform low-clouds, because the model simulates too few of them. In contrast, ∣SWCRE∣ is overestimated for trade wind cumulus clouds, because in the model these are too thick. The clouds in the deep convection regions also lead to overestimate the ∣SWCRE∣. These clouds are generally too thick and there are too few mid and high thin clouds. These biases are consistent with the positive precipitation bias and the overly strong mass flux for deep convective plumes. Potential sources for the various cloud biases in the model are discussed. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54622
Appears in Collections: 过去全球变化的重建
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作者单位: KNMI, Royal Netherlands Meteorological Institute, De Bilt, Netherlands
Recommended Citation:
Lacagnina C.,Selten F.. Evaluation of clouds and radiative fluxes in the EC-Earth general circulation model[J]. Climate Dynamics,2014-01-01,43(2017-09-10)