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.
  • Bootstrapping of confidence intervals for 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 1.4e+03 1.11e+03 1.44e+03 All datasets
Bias (difference of means) [m³/m³] ~ 0 ~ 0 ~ 0 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] ~ 0 ~ 0 ~ 0 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] ~ 0 ~ 0 ~ 0 1-ESA_CCI_SM_combined (v05.2)
Pearson's r [-] 0.50 0.56 0.32 1-ESA_CCI_SM_combined (v05.2)
Pearson's r p-value [-] 2.11e-02 ~ 0 ~ 0 1-ESA_CCI_SM_combined (v05.2)
Residual sum of squares [(m³/m³)²] 6.33 3.76 6.89 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)
Spearman's ρ [-] 0.50 0.55 0.32 1-ESA_CCI_SM_combined (v05.2)
Spearman's ρ p-value [-] 2.56e-02 ~ 0 ~ 0 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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