Figure 4. Bias ratio comparison of annual precipitation sums for six different climatologies with the CRU⁹ climatology at the global scale.

All models have a substantial dry bias over Greenland when compared to CRU (TRMM/TMPA (3B43)⁵³ does not include Greenland). Large differences in bias ratios can be observed in the Atacama, where CHELSA, and GPCC⁵⁰ are drier than CRU, and WorldClim⁸, CHPclim⁵², TRMM/TMPA (3B43), and ERA-Interim¹⁷ are wetter. Also on the Himalaya plateau large differences are visible, with CHELSA, GPCC, and TRMM (3B43) being drier, and WorldClim and ERA-Interim being wetter.