Uncertainties in regional climate changes are significant in many regions , and in climate model ensembles, the range of regional outcomes generally increases with global warming. This widening of the range of outcomes can contribute to the increased likelihood of extreme droughts across the ensemble as a whole . The response of transpiration to elevated CO2 is also a significant uncertainty. The inclusion of CO2 physiological effects leads to smaller projected increases in agricultural, ecological or hydrological drought (Milly and Dunne, 2016; Yang et al.,
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report