Important websites
Global historical climate data
via Worldclim (link) 2. via GLEAM (link) 3. via TerraClimate (link) 4. via CCKP (link)
GRACE data
via GRACE JPL (link)
Global Land Use and Land Cover
via UOM (link)
CMIP data
via Copernicus (link)
Global water Isotope data (link )
All GIS data (link)