WRF Dynamical Downscaling of CCSM over the Arabian Peninsula

This study proposes dynamical downscaling simulations-high resolution of 12 km- by Weather Research and Forecasting (WRF) model, over the Arabian Peninsula. The downscaling of the Community Climate System Model (CCSM), to simulate (2000–2010), and future (2050–2060) time periods. The Arabian Peninsula is experiencing extreme weather events characterized by large precipitation and above average summer maximum temperatures, which are strong indicators of the climate change impact in the region.  The CCSM-WRF model values were evaluated against values obtained by the Center for Climate Integrity (CCI) on a monthly basis, and during extreme weather events 10 years’ period (2000-2010). The CCSM-WRF results at 12 km are comparable with published outcomes of high-resolution regional climate models, and shows better performance especially during the extreme events over the region (flash floods and heat waves). The future projection of the model shows that the maximum summer average values of temperature, soil temperature, and soil moisture, will increase in the next 30 to 40 years.