Validation Results

Summary: C3S v201912/v202012 vs ERA5-Land EU

  • Started validation on April 29, 2021, 9:55 a.m. UTC, finished on April 29, 2021, 8:55 p.m. UTC.
  • Compared 3 datasets:
    • Dataset 1: C3S (v202012, sm) [Filters: Not freezing and no snow-cover (flag != 1); No dense vegetation (flag != 2); Variable in valid geophysical range; Data with no inconsistencies detected (flag = 0); ]
    • Dataset 2: C3S (v201912, sm) [Filters: Not freezing and no snow-cover (flag != 1); No dense vegetation (flag != 2); Variable in valid geophysical range; Data with no inconsistencies detected (flag = 0); ]
    • Reference: ERA5-Land (v20190904, swvl1) [Filters: Soil not frozen; Variable in valid geophysical range; ]
  • Spatial filter bounding box: [34.0, -11.2, 71.6, 48.3].
  • Validation period / temporal filter: Jan. 1, 2001, midnight UTC to April 30, 2019, 11:59 p.m. UTC.
  • Validation metrics calculated from absolute values.
  • Triple collocation analysis was deactivated.
  • Scaling reference: ERA5-Land (v20190904, swvl1) [Filters: Soil not frozen; Variable in valid geophysical range; ]
  • Scaling method: Mean/standard deviation.
  • Processing took 660 minutes (wall time).
  • 0% (0 of 134439) of the processed locations (grid points) produced errors during calculation.
  • This result was published on zenodo with DOI 10.5281/zenodo.4732330.

Summary statistics

The mean, median and standard deviation are calculated on the validation results aggregated by metric and dataset. The reference dataset used is ERA5-Land (v20190904, swvl1).

Metric Mean Median IQ range Dataset
# observations 3025.5 2875.0 1784.0 All datasets
Bias (difference of means) [m³/m³] 3.27e-10 0.e+00 0.e+00 1-C3S (v202012)
Spearman's rho [-] 5.97e-01 6.61e-01 3.14e-01 2-C3S (v201912)
Spearman's rho [-] 6.02e-01 6.66e-01 3.05e-01 1-C3S (v202012)
Spearman's rho p-value [-] 8.26e-04 0.e+00 0.e+00 2-C3S (v201912)
Spearman's rho p-value [-] 8.12e-04 0.e+00 0.e+00 1-C3S (v202012)
Pearson's r p-value [-] 2.15e-03 0.e+00 0.e+00 2-C3S (v201912)
Pearson's r p-value [-] 2.56e-03 0.e+00 0.e+00 1-C3S (v202012)
Mean square error variance [(m³/m³)²] 8.67e-18 0.e+00 1.39e-17 2-C3S (v201912)
Mean square error variance [(m³/m³)²] 8.61e-18 0.e+00 1.39e-17 1-C3S (v202012)
Mean square error correlation [(m³/m³)²] 3.25e-03 2.84e-03 1.72e-03 2-C3S (v201912)
Unbiased root-mean-square deviation [m³/m³] 5.46e-02 5.3e-02 1.59e-02 1-C3S (v202012)
Mean square error correlation [(m³/m³)²] 3.21e-03 2.81e-03 1.7e-03 1-C3S (v202012)
Mean square error bias [(m³/m³)²] 5.47e-16 0.e+00 8.88e-16 1-C3S (v202012)
Mean square error [(m³/m³)²] 3.25e-03 2.84e-03 1.72e-03 2-C3S (v201912)
Mean square error [(m³/m³)²] 3.21e-03 2.81e-03 1.7e-03 1-C3S (v202012)
Residual sum of squares [(m³/m³)²] 9.46e+00 8.22e+00 6.04e+00 2-C3S (v201912)
Residual sum of squares [(m³/m³)²] 9.31e+00 8.08e+00 5.89e+00 1-C3S (v202012)
Root-mean-square deviation [m³/m³] 5.48e-02 5.32e-02 1.60e-02 2-C3S (v201912)
Root-mean-square deviation [m³/m³] 5.44e-02 5.29e-02 1.6e-02 1-C3S (v202012)
Pearson's r [-] 5.65e-01 6.32e-01 3.33e-01 2-C3S (v201912)
Pearson's r [-] 5.70e-01 6.40e-01 3.34e-01 1-C3S (v202012)
Bias (difference of means) [m³/m³] 4.3e-10 0.e+00 0.e+00 2-C3S (v201912)
Mean square error bias [(m³/m³)²] 5.41e-16 0.e+00 8.88e-16 2-C3S (v201912)
Unbiased root-mean-square deviation [m³/m³] 5.5e-02 5.33e-02 1.6e-02 2-C3S (v201912)

Result files

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