Journal
INTERNATIONAL JOURNAL OF CLIMATOLOGY
Volume 37, Issue -, Pages 741-760Publisher
WILEY
DOI: 10.1002/joc.5035
Keywords
Central Africa; present climate; REMO; CORDEX; RCM
Categories
Funding
- TWAS-DFG Cooperation Visits Programme for scientists from sub-Saharan Africa
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Simulations of the regional climate model REMO at 25 and 50 km (0.44 degrees and 0.22 degrees, respectively) grid spacing are evaluated over Central Africa for the period 1998-2010. The model's ability to simulate various aspects of the observed climate is assessed with a main focus on precipitation characteristics. The results show that the REMO model has a good skill to reproduce the main regional features of the mean climate fields as well as seasonal and annual cycles, although some biases still exist. The model captures the variability in precipitation anomalies between different events associated with El Nino/Southern Oscillation. Generally, the findings remain largely insensitive to the refinement of the horizontal resolution, especially when considering the regional scale. This points the fact that the model dynamical and physical setup may have to be adjusted when setting a focus on the Central African region, in order to better represent the climate mechanisms. It is further found that REMO is capable of capturing the basic features of climatic extremes and accurately represents the shape of the frequency distribution of daily precipitation data. Daily characteristics of precipitation are simulated much better by REMO at 25 km.
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