Significant warming has occurred across drylands globally . Surface warming  of 1.2℃-1.3℃ in global drylands has exceeded the 0.8°C-1.0℃ warming over humid lands . As measured by the Al, this has expanded the area of drylands by ~4% from 1948-2004 . However, as mentioned in Figure CCP3.1, the Al has various limitations in assessing drylands expansion. Increases in potential evapotranspiration have exceeded increases in precipitation in the last
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report