Climate Change Impact on Water Resources (CCIWR)
Projected future changes in water resources across all global land areas at 0.5° × 0.5° resolution, built on top of the ISIMIP3b protocol. It covers three hydrological variables — total runoff, diffuse groundwater recharge, and actual evapotranspiration — derived from a multi-model ensemble of global hydrological and CMIP6 climate models. Relative changes are provided for three future 30-year horizons under three emissions scenarios (SSP1-2.6, SSP3-7.0, SSP5-8.5), at annual and seasonal timescales. The ensemble spread captures projection uncertainty, supporting risk-aware climate change adaptation planning.