Validation Results

Summary: ESA CCI SM v05.2 COMBINED vs ISMN

  • Started validation on Sept. 9, 2020, 7:20 a.m. UTC, finished on Sept. 9, 2020, 7:26 a.m. UTC.
  • Compared 2 datasets:
    • Dataset 1: ESA CCI SM combined (v05.2, 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: ISMN (20191211 global, soil moisture) [Filters: Variable in valid geophysical range; Quality flag is "good" (G); Use ISMN networks: AMMA-CATCH,BIEBRZA-S-1,BNZ-LTER,CARBOAFRICA,COSMOS,CTP-SMTMN,DAHRA,FLUXNET-AMERIFLUX,FMI,FR-Aqui,HOBE,iRON,LAB-net,MySMNet,OZNET,PBO-H2O,REMEDHUS,RISMA,RSMN,SCAN,SMOSMANIA,TERENO,USCRN,WEGENERNET,WSMN; ]
  • Validated globally.
  • Validation period / temporal filter: Jan. 1, 1978, midnight UTC to Sept. 9, 2020, 11:59 p.m. UTC.
  • Validation metrics calculated from absolute values.
  • Triple collocation analysis was deactivated.
  • Scaling reference: ISMN (20191211 global, soil moisture) [Filters: Variable in valid geophysical range; Quality flag is "good" (G); Use ISMN networks: AMMA-CATCH,BIEBRZA-S-1,BNZ-LTER,CARBOAFRICA,COSMOS,CTP-SMTMN,DAHRA,FLUXNET-AMERIFLUX,FMI,FR-Aqui,HOBE,iRON,LAB-net,MySMNet,OZNET,PBO-H2O,REMEDHUS,RISMA,RSMN,SCAN,SMOSMANIA,TERENO,USCRN,WEGENERNET,WSMN; ]
  • Scaling method: Mean/standard deviation.
  • Processing took 6 minutes (wall time).
  • 0% (0 of 1382) of the processed locations (grid points) produced errors during calculation.
  • This result was published on zenodo with DOI 10.5281/zenodo.4020300.

Summary statistics

The mean, median and standard deviation are calculated on the validation results aggregated by metric and dataset. The reference dataset used is ISMN (20191211 global, soil moisture).

Metric Mean Median IQ range Dataset
# observations 1395.1 1110.0 1440.5 All datasets
Bias (difference of means) [m³/m³] 1.79e-09 4.5e-10 2.20e-08 1-ESA_CCI_SM_combined (v05.2)
Pearson's r [-] 5.04e-01 5.57e-01 3.19e-01 1-ESA_CCI_SM_combined (v05.2)
Root-mean-square deviation [m³/m³] 6.32e-02 5.98e-02 3.11e-02 1-ESA_CCI_SM_combined (v05.2)
Residual sum of squares [(m³/m³)²] 6.33e+00 3.76e+00 6.89e+00 1-ESA_CCI_SM_combined (v05.2)
Mean square error [(m³/m³)²] 4.76e-03 3.58e-03 3.77e-03 1-ESA_CCI_SM_combined (v05.2)
Mean square error bias [(m³/m³)²] 5.66e-16 1.18e-16 4.53e-16 1-ESA_CCI_SM_combined (v05.2)
Mean square error correlation [(m³/m³)²] 4.76e-03 3.58e-03 3.77e-03 1-ESA_CCI_SM_combined (v05.2)
Mean square error variance [(m³/m³)²] 9.66e-18 3.48e-18 1.03e-17 1-ESA_CCI_SM_combined (v05.2)
Pearson's r p-value [-] 2.11e-02 0.e+00 1.68e-26 1-ESA_CCI_SM_combined (v05.2)
Spearman's rho p-value [-] 2.56e-02 0.e+00 6.99e-27 1-ESA_CCI_SM_combined (v05.2)
Spearman's rho [-] 5.04e-01 5.51e-01 3.19e-01 1-ESA_CCI_SM_combined (v05.2)
Unbiased root-mean-square deviation [m³/m³] 6.32e-02 5.98e-02 3.11e-02 1-ESA_CCI_SM_combined (v05.2)

Result files

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