Table 3 Number of observations and their average duration, per variable, region and period, used in the validation comparison.

From: Multi-model hydrological reference dataset over continental Europe and an African basin

Variable

Common region

Common period

Observation number (#)

Observation average duration (years)

Discharge

Europe

‘96-’15

2899

18.0

Po basin

‘96-’15

163

13.0

Rhine basin

‘96-’15

354

19.3

Tugela basin

‘90-’15

27

22.2

Evapotranspiration

Europe

‘96-’15

56

10.0

Po basin

‘96-’15

1

3.0

Rhine basin

‘96-’15

6

11.2

Soil moisture content

Europe

‘96-’15

252

5.6

Po basin

‘96-’15

8

3.5

Rhine basin

‘96-’15

1

4.6

Total water storage anomaly

Europe

‘96-’15

4

12.3

Po basin

‘96-’15

4

12.3

Rhine basin

‘96-’15

4

12.3

Tugela basin

‘90-’15

4

12.3

Discharge (additional)

upper Po basin

‘15-’17

8

2.2

Soil moisture content (additional)

Rhine basin

‘13-’17

1

4.5

Total water storage anomaly (additional)

Rhine basin

‘13-’17

4

3.3

  1. In the bottom part, information for the additional comparisons with a different spatiotemporal subselections is shown (see Technical Validation Section). For the discharge, evapotranspiration and soil moisture content anomaly variables, the number of observations indicates the number of observation stations (at every depth for the soil moisture content anomalies). For the total water storage anomaly variable, observations are aggregated for each region (see Technical Validation Section), resulting in a single observation for each of the four GRACE solutions (CRS spherical, GFZ spherical, JPL spherical and JPL mascon).