Summertime (JJA) évapotranspiration (ET) response to anthropogenic forcing [(left) historical, (center) RCP8.5 midcentury, (right) RCP8.5 end of century]. For all panels, we show JJA seasonal means in total ET and its three components (outlined in the red box in the middle): soil evaporation, canopy evaporation, and plant transpiration. (bottom) Maps showing the end-of-century (RCP8.5, 2071–2100) change in the fraction of total JJA ET coming from each component: soil, canopy, and transpiration. Each panel shows the ensemble mean of each run’s 30-yr average time series standardized to the 1800-yr PI-control simulation mean and standard deviation. Insignificant change is denoted with hatching.