DOI: 10.1007/s00382-015-2529-x
Scopus记录号: 2-s2.0-84947496221
论文题名: An RCM multi-physics ensemble over Europe: multi-variable evaluation to avoid error compensation
作者: García-Díez M. ; Fernández J. ; Vautard R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-11-12 起始页码: 3141
结束页码: 3156
语种: 英语
英文关键词: CERES
; CORDEX
; E-OBS
; EURO-CORDEX
; GLDAS
; Model evaluation
; Multi-physics
; Radiation
; Soil moisture
; WRF
英文摘要: Regional Climate Models are widely used tools to add detail to the coarse resolution of global simulations. However, these are known to be affected by biases. Usually, published model evaluations use a reduced number of variables, frequently precipitation and temperature. Due to the complexity of the models, this may not be enough to assess their physical realism (e.g. to enable a fair comparison when weighting ensemble members). Furthermore, looking at only a few variables makes difficult to trace model errors. Thus, in many previous studies, these biases are described but their underlying causes and mechanisms are often left unknown. In this work the ability of a multi-physics ensemble in reproducing the observed climatologies of many variables over Europe is analysed. These are temperature, precipitation, cloud cover, radiative fluxes and total soil moisture content. It is found that, during winter, the model suffers a significant cold bias over snow covered regions. This is shown to be related with a poor representation of the snow-atmosphere interaction, and is amplified by an albedo feedback. It is shown how two members of the ensemble are able to alleviate this bias, but by generating a too large cloud cover. During summer, a large sensitivity to the cumulus parameterization is found, related to large differences in the cloud cover and short wave radiation flux. Results also show that small errors in one variable are sometimes a result of error compensation, so the high dimensionality of the model evaluation problem cannot be disregarded. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53899
Appears in Collections: 过去全球变化的重建
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作者单位: Unitat de Dinàmica i Impacte Climàtic (UDIC), Institut Català de Ciències del Clima, Barcelona, Catalonia, Spain; Grupo de Meteorología, Dept. Matemática Aplicada y Ciencias de la Computación, Univ. de Cantabria, Avda. de los Castros, s/n, Santander, Spain; Laboratoire des Sciences du Climat et de l’Environnement, Institute Pierre-Simon-Laplace, CEA, CNRS, UVSQ, Gif sur Yvette, France
Recommended Citation:
García-Díez M.,Fernández J.,Vautard R.. An RCM multi-physics ensemble over Europe: multi-variable evaluation to avoid error compensation[J]. Climate Dynamics,2015-01-01,45(2017-11-12)