DOI: 10.1007/s00382-013-1834-5
Scopus记录号: 2-s2.0-84902007035
论文题名: COSMO-CLM (CCLM) climate simulations over CORDEX-Africa domain: Analysis of the ERA-Interim driven simulations at 0.44° and 0.22° resolution
作者: Panitz H.-J. ; Dosio A. ; Büchner M. ; Lüthi D. ; Keuler K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-11-12 起始页码: 3015
结束页码: 3038
语种: 英语
英文关键词: CORDEX-Africa
; COSMO-CLM Regional Climate Model
; ERA-Interim driven evaluation run
; High resolution simulation
英文摘要: We present the results of the application of the COSMO-CLM Regional Climate Model (CCLM) over the CORDEX-Africa domain. Two simulations were performed driven by the ERA-Interim reanalysis (1989-2008): the first one with the standard CORDEX spatial resolution (0.44°), and the second one with an unprecedented high resolution (0.22°). Low-level circulation and its vertical structure, the geographical and temporal evolution of temperature and precipitation are critically evaluated, together with the radiation budget and surface energy fluxes. CCLM is generally able to reproduce the overall features of the African climate, although some deficiencies are evident. Flow circulation is generally well simulated, but an excessive pressure gradient is present between the Gulf of Guinea and the Sahara, related to a marked warm bias over the Sahara and a cold bias over southern Sahel. CCLM underestimates the rainfall peak in the regions affected by the passage of the monsoon. This dry bias may be a consequence of two factors, the misplacement of the monsoon centre and the underestimation of its intensity. The former is related to the northern shift of the West African Heat Low. On the other hand, the underestimation of precipitation intensity may be related to the underestimation of the surface short-wave radiation and latent heat flux. The increase of the model resolution does not bring evident improvements to the results for monthly means statistics. As a result, it appears that 0.44° is a suitable compromise between model performances and computational constrains. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54397
Appears in Collections: 过去全球变化的重建
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作者单位: Karlsruher Institut für Technologie, Institut für Meteorologie und Klimaforschung, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; European Commission Joint Research Centre, Ispra, Italy; Potsdam Institute for Climate Impact Research (PIK), Potsdam, Germany; Swiss Federal Institute of Technology (ETH), Zurich, Switzerland; Brandenburg University of Technology (BTU), Cottbus, Germany
Recommended Citation:
Panitz H.-J.,Dosio A.,Büchner M.,et al. COSMO-CLM (CCLM) climate simulations over CORDEX-Africa domain: Analysis of the ERA-Interim driven simulations at 0.44° and 0.22° resolution[J]. Climate Dynamics,2014-01-01,42(2017-11-12)