TITLE:
Validation of Monthly Data of Temperature and Precipitation over West Africa from Simulations of CORDEX-CORE Ensemble
AUTHORS:
Alphonse Um Um, Cyrille Meukaleuni, Eric Efon, Brice Baudouin Sandjeu Wandjie, Rinelle Djiondo Ngongang, Alain Tchio Tamoffo, Carine Betant, Andre Lenouo
KEYWORDS:
CORDEX-CORE, Regional Climate Model Evaluation, ERA5, CHIRPS, FEWS-ARC, West Africa
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.13 No.1,
January
30,
2025
ABSTRACT: We analysed nine simulations from dynamic downscaling to a horizontal resolution of approximately 25 km of three general circulation models (GCMs). These GCMs use three regional climate models (RCMs) that participated in the coordinated downscaling experiment (CORDEX-CORE). These simulations were compared to three datasets of reanalysis. The ERA5 for temperature at 2 metres and for precipitation, Climate Hazards Center InfraRed Precipitation with Stations (CHIRPS) and African Rainfall Climatology from the Famine Early Warning System (FEWS-ARC) were used. To give an overview of these nine model experiments, we presented and compared the results of the latter with the reanalysis taken into account for the period 1983 - 2005. The results indicated that the nine models correctly reproduced the temperature and rainfall in West Africa during the historical period. In the Guinean coast region, REMO-NorESM1 and RegCM4-MPI-MR models well simulated precipitation and temperature during the historical period. In the Savannah region, RegCM4-NorESM1, CCLM5-MPI-LR, REMO-NorESM1, CCLM5-NorESM1 and CCLM5-HadGEM2 model gave best result. In the Sahel region, the RegCM4-HadGEM2 model gave a good correlation. Using the Taylor diagram in the historical period, all CORDEX-CORE RCMs had a strong relationship with temperature.