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|Title:||Evaluation of rainfall simulations over Uganda in CORDEX Regional Climate Models|
|Authors:||KISEMBE JESSE; FAVRE ALICE; DOSIO ALESSANDRO; LENNARD CHRISTOPHER; SABIITI GEOFFREY; NIMUSIIMA A|
|Citation:||THEORETICAL AND APPLIED CLIMATOLOGY|
|Type:||Articles in periodicals and books|
|Abstract:||The study evaluates the ability of ten regional climate models (RCMs) to simulate the present day rainfall over Uganda within the Coordinated Regional Downscaling Experiment (CORDEX) for the period 1990-2008. The models’ ability to reproduce the space-time variability of annual, seasonal and interannual rainfall has been diagnosed. A series of metrics have been employed to quantify the RCM-simulated rainfall pattern discrepancies and biases compared to three gridded observational datasets. It is found that most models underestimate the annual rainfall over the country; however, the seasonality of rainfall is properly reproduced by the RCMs with a bimodal component over the major part of the country and unimodal component over the North. Models reproduce the interannual variability of the dry season (December-February) but fail with the long and short rains seasons even if the ENSO signal is correctly simulated by most models. In many aspects, the UQAM-CRCM5 RCM is found to perform best over the region. Overall, the ensemble mean of the 10 RCMs reproduces the rainfall climatology over Uganda with reasonable skill.|
|JRC Directorate:||Space, Security and Migration|
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