Validation Results

Summary: v061_v052_combined_ERA5_2007_2019_global

  • Started validation on March 30, 2021, 3:55 p.m. UTC, finished on March 31, 2021, 2:42 a.m. UTC.
  • Compared 3 datasets:
    • Dataset 1: ESA CCI SM combined (v06.1, sm) [Filters: Variable in valid geophysical range; Data with no inconsistencies detected (flag = 0); ]
    • Dataset 2: ESA CCI SM combined (v05.2, sm) [Filters: Variable in valid geophysical range; Data with no inconsistencies detected (flag = 0); ]
    • Reference: ERA5 (v20190613, swvl1) [Filters: Soil not frozen; Variable in valid geophysical range; ]
  • Validated globally.
  • Validation period / temporal filter: Jan. 1, 2007, midnight UTC to March 31, 2019, 11:59 p.m. UTC.
  • Validation metrics calculated from absolute values.
  • Triple collocation analysis was activated.
  • Scaling reference: ERA5 (v20190613, swvl1) [Filters: Soil not frozen; Variable in valid geophysical range; ]
  • Scaling method: Mean/standard deviation.
  • Processing took 647 minutes (wall time).
  • 0% (0 of 244450) of the processed locations (grid points) produced errors during calculation.
  • This result was published on zenodo with DOI 10.5281/zenodo.4651299.

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 (v20190613, swvl1).

Metric Mean Median IQ range Dataset
# observations 2166.7 2109.0 1828.0 All datasets
Bias (difference of means) [m³/m³] 1.32e-10 0.e+00 1.16e-10 1-ESA_CCI_SM_combined (v06.1)
Spearman's rho [-] 4.87e-01 5.46e-01 4.8e-01 2-ESA_CCI_SM_combined (v05.2)
Spearman's rho [-] 5.04e-01 5.55e-01 4.58e-01 1-ESA_CCI_SM_combined (v06.1)
Spearman's rho p-value [-] 1.98e-02 0.e+00 5.07e-19 2-ESA_CCI_SM_combined (v05.2)
Spearman's rho p-value [-] 1.64e-02 0.e+00 2.19e-24 1-ESA_CCI_SM_combined (v06.1)
Pearson's r p-value [-] 1.71e-02 0.e+00 1.18e-22 2-ESA_CCI_SM_combined (v05.2)
Pearson's r p-value [-] 1.32e-02 0.e+00 4.88e-29 1-ESA_CCI_SM_combined (v06.1)
Mean square error variance [(m³/m³)²] 8.88e-18 0.e+00 1.39e-17 2-ESA_CCI_SM_combined (v05.2)
Mean square error variance [(m³/m³)²] 8.89e-18 0.e+00 3.47e-18 1-ESA_CCI_SM_combined (v06.1)
Mean square error correlation [(m³/m³)²] 3.59e-03 2.85e-03 2.57e-03 2-ESA_CCI_SM_combined (v05.2)
Mean square error correlation [(m³/m³)²] 3.46e-03 2.73e-03 2.48e-03 1-ESA_CCI_SM_combined (v06.1)
Unbiased root-mean-square deviation [m³/m³] 5.44e-02 5.23e-02 2.30e-02 1-ESA_CCI_SM_combined (v06.1)
Mean square error bias [(m³/m³)²] 3.99e-16 3.39e-21 8.88e-16 1-ESA_CCI_SM_combined (v06.1)
Mean square error bias [(m³/m³)²] 3.94e-16 0.e+00 8.88e-16 2-ESA_CCI_SM_combined (v05.2)
Mean square error [(m³/m³)²] 3.46e-03 2.73e-03 2.48e-03 1-ESA_CCI_SM_combined (v06.1)
Residual sum of squares [(m³/m³)²] 6.61e+00 5.71e+00 5.69e+00 2-ESA_CCI_SM_combined (v05.2)
Residual sum of squares [(m³/m³)²] 6.41e+00 5.41e+00 5.31e+00 1-ESA_CCI_SM_combined (v06.1)
Root-mean-square deviation [m³/m³] 5.54e-02 5.34e-02 2.35e-02 2-ESA_CCI_SM_combined (v05.2)
Root-mean-square deviation [m³/m³] 5.44e-02 5.23e-02 2.30e-02 1-ESA_CCI_SM_combined (v06.1)
Pearson's r [-] 5.06e-01 5.71e-01 4.6e-01 2-ESA_CCI_SM_combined (v05.2)
Pearson's r [-] 5.25e-01 5.76e-01 4.35e-01 1-ESA_CCI_SM_combined (v06.1)
Bias (difference of means) [m³/m³] 3.36e-10 0.e+00 2.33e-10 2-ESA_CCI_SM_combined (v05.2)
Mean square error [(m³/m³)²] 3.59e-03 2.85e-03 2.57e-03 2-ESA_CCI_SM_combined (v05.2)
Unbiased root-mean-square deviation [m³/m³] 5.54e-02 5.34e-02 2.35e-02 2-ESA_CCI_SM_combined (v05.2)
Error standard deviation [m³/m³] 1.11e-02 1.19e-02 1.00e-02 2-ESA_CCI_SM_combined (v05.2)
Error standard deviation [m³/m³] 1.10e-02 9.22e-03 1.03e-02 1-ESA_CCI_SM_combined (v06.1)
TC scaling coefficient [m³/m³] 5.73e-01 6.76e-01 4.02e-01 2-ESA_CCI_SM_combined (v05.2)
TC scaling coefficient [m³/m³] 5.6e-01 6.70e-01 4.38e-01 1-ESA_CCI_SM_combined (v06.1)
Signal-to-noise ratio [db] 1.08e+01 1.12e+01 8.87e+00 1-ESA_CCI_SM_combined (v06.1)
Signal-to-noise ratio [db] 8.41e+00 9.15e+00 9.09e+00 2-ESA_CCI_SM_combined (v05.2)

Result files

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