Fig. 1: Warming increases aridity and shifts water and energy limits of Evapotranspiration.
From: Evapotranspiration depletes groundwater under warming over the contiguous United States
a Map of Baseline aridity index (AI) classified as strongly water limited (dark orange), weakly water limited (light orange), weakly energy limited (light purple), and strongly energy limited (dark purple). Shifts between AI classifications for the 1.5 °C (c) 2 °C (d) and 4 °C cases (e) (color legend shown with the arrows on b). The Budyko relationship between AI and evaporative fraction (b) (solid black line), plotted relative to the water (Evapotranspiration (ET)/Precipitation (P) = 1) and energy (Evapotranspiration (ET) = Potential Evapotranspiration (PET)) absolute limits (dashed blue lines).
