DOI: 10.1007/s00382-011-1276-x
Scopus记录号: 2-s2.0-84866422100
论文题名: Characterization of the rainy season in Burkina Faso and it's representation by regional climate models
作者: Ibrahim B. ; Polcher J. ; Karambiri H. ; Rockel B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 6 起始页码: 1287
结束页码: 1302
语种: 英语
英文关键词: Burkina Faso
; Climate change
; Climate modeling
; Rainfall variability
; Sahel
英文摘要: West African monsoon is one of the most challenging climate components to model. Five regional climate models (RCMs) were run over the West African region with two lateral boundary conditions, ERA-Interim re-analysis and simulations from two general circulation models (GCMs). Two sets of daily rainfall data were generated from these boundary conditions. These simulated rainfall data are analyzed here in comparison to daily rainfall data collected over a network of ten synoptic stations in Burkina Faso from 1990 to 2004. The analyses are based on a description of the rainy season throughout a number of it's characteristics. It was found that the two sets of rainfall data produced with the two driving data present significant biases. The RCMs generally produce too frequent low rainfall values (between 0. 1 and 5 mm/day) and too high extreme rainfalls (more than twice the observed values). The high frequency of low rainfall events in the RCMs induces shorter dry spells at the rainfall thresholds of 0. 1-1 mm/day. Altogether, there are large disagreements between the models on the simulate season duration and the annual rainfall amounts but most striking are their differences in representing the distribution of rainfall intensity. It is remarkable that these conclusions are valid whether the RCMs are driven by re-analysis or GCMs. In none of the analyzed rainy season characteristics, a significant improvement of their representation can be found when the RCM is forced by the re-analysis, indicating that these deficiencies are intrinsic to the models. © 2011 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55170
Appears in Collections: 过去全球变化的重建
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作者单位: Institut International d'Ingénierie de l'Eau et de l'Environnement (2iE), 01 BP 594 Ouagadougou 01, Burkina Faso; Laboratoire de Météorologie Dynamique du CNRS, Institut Pierre Simon Laplace, Boite 99, 4 Place Jussieu, 75252 Paris Cedex 05, France; Helmholtz-Zentrum Geesthacht Institute of Coastal Research/Group Regional Atmospheric Modeling, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
Recommended Citation:
Ibrahim B.,Polcher J.,Karambiri H.,et al. Characterization of the rainy season in Burkina Faso and it's representation by regional climate models[J]. Climate Dynamics,2012-01-01,39(6)