Table 3 Global test metrics for a comparison between the downscaled CHELSA_EarthEnv data and the original ERA5 data based on 122,236,056 observations at 58,071 stations between 2003 and 2016.

From: Global daily 1 km land surface precipitation based on cloud cover-informed downscaling

Resolution

rmse

mae

pbias

KGE

Person’s r

β

γ

0.0083334°

6.592

2.584

−2.500

0.493

0.562

0.975

0.828

0.25°

6.608

2.628

−2.700

0.448

0.548

0.973

0.790

Difference (Δ)

−0.016

−0.044

−0.200

0.045

0.014

0.002

0.038

  1. rmse = root mean squared error, mae = mean absolute error, pbias = percent precipitation bias88, KGE = Kling-Gupta Efficiency, r = Pearson product-moment correlation coefficient, β = the ratio between the mean of the simulated values and the mean of the observed ones, γ = ratio between the coefficient of variation (CV) of the simulated values to the coefficient of variation of the observed ones. Units for the rmse and mae are in kg m−2 day−1.
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