DOI: 10.1007/s00382-012-1511-0
Scopus记录号: 2-s2.0-84868686771
论文题名: The representation of tropical upper tropospheric water in EC Earth V2
作者: Johnston M.S. ; Eriksson P. ; Eliasson S. ; Jones C.G. ; Forbes R.M. ; Murtagh D.P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 11 起始页码: 2713
结束页码: 2731
语种: 英语
英文关键词: Climate
; Clouds
; Humidity
; IWC
; Satellite
; Tropics
英文摘要: Tropical upper tropospheric humidity, clouds, and ice water content, as well as outgoing longwave radiation (OLR), are evaluated in the climate model EC Earth with the aid of satellite retrievals. The Atmospheric Infrared Sounder and Microwave Limb Sounder together provide good coverage of relative humidity. EC Earth's relative humidity is in fair agreement with these observations. CloudSat and CALIPSO data are combined to provide cloud fractions estimates throughout the altitude region considered (500-100 hPa). EC Earth is found to overestimate the degree of cloud cover above 200 hPa and underestimate it below. Precipitating and non-precipitating EC Earth ice definitions are combined to form a complete ice water content. EC Earth's ice water content is below the uncertainty range of CloudSat above 250 hPa, but can be twice as high as CloudSat's estimate in the melting layer. CERES data show that the model underestimates the impact of clouds on OLR, on average with about 9 W m-2. Regionally, EC Earth's outgoing longwave radiation can be ~20 W m-2 higher than the observation. A comparison to ERA-Interim provides further perspectives on the model's performance. Limitations of the satellite observations are emphasised and their uncertainties are, throughout, considered in the analysis. Evaluating multiple model variables in parallel is a more ambitious approach than is customary. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55169
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Space Sciences, Chalmers University of Technology, 412 96 Göteburg, Sweden; Swedish Meteorological and Hydrological Institute (SMHI), Folkborgsvägen 1, 601 76 Norrköping, Sweden; Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, Space Campus 1, 98128 Kiruna, Sweden; ECMWF, Shinfield Park, Reading, Berkshire RG2 9AX, United Kingdom
Recommended Citation:
Johnston M.S.,Eriksson P.,Eliasson S.,et al. The representation of tropical upper tropospheric water in EC Earth V2[J]. Climate Dynamics,2012-01-01,39(11)