Summer temperature response to extreme soil water conditions in the Mediterranean transitional climate regime

Abstract Land surface and atmosphere are interlocked by the hydrological energy cycles effects of soil water-air coupling can modulate near-surface temperatures. In this work, three paired experiments were designed to evaluate impacts different moisture initial boundary conditions on summer temperatures in Mediterranean transitional climate regime region. area, evapotranspiration is not limited solar radiation, rather moisture, which therefore controls layer variability. Extremely dry, extremely wet averagely humid ground imposed two global models at beginning warm dry season. Then, sensitivity experiments, where alternatively interactive with forced land surface, launched. The state largely affects temperatures: soils contribute lower exacerbate heat extremes, while terrains suppress thermal peaks, both last for several months. Land-atmosphere proves be a fundamental ingredient state, through partition between latent sensible fluxes. coupled runs, early season waves sustained soils, respond hot weather increased evaporative demand, resulting longer-lasting extreme On other hand, when prescribed across season, occurrence days suppressed. climatological precipitation forcing causes temperature drop throughout months, due evaporation water. Results have implications seasonal forecasts rain-fed irrigated continental regions zones.