Potential Dust Induced Changes on the Seasonal Variability of Temperature Extremes Over the Sahel: A Regional Climate Modeling Study

The aim of this study is to simulate the impact mineral dust emissions from Sahel–Saharan zone on temperature extremes over Sahel. To achieve goal, we performed two numerical simulations: one with standard version regional climate model RegCM4 (no run) and another same incorporating a module (dust run). difference between both versions allowed isolate impacts extremes. results show that accumulation into atmosphere leads decrease frequency warm days, very nights This higher during MAM (March-April-May) JJA (June-July-August) periods especially in northern western parts also manifested by tropical When considering spells, particles tend weaken them estimate potential heat stress, index humidex are used. analysis shows reduce health risks particularly Sahel period, JJA, southern northeastern SON (September-October-November) period. As for humidex, it characterized all seasons. reduction occurrence thermal may have positive effect energy demand cooling global health. However, increase meningitis incidence prevalence.