WAPOR

Evaporation/ Transpiration

Parameter

Evaporation

Unit = mm

Sub-parameters

Evaporation (average)

Evaporation (change)

Evaporation (anomalies)

Represented range

Evaporation (average): 0/300 mm

Evaporation (change): -30/55 mm

Evaporation (anomalies): -40/60mm

Description

Average annual Evaporation (E) for the last three years on record 2017-2019. Evaporation expresses the actual evaporation of the soil surface.

Annual trend in Evaporation (E) changes for the years 2009-2019. Scale of the linear fit of the yearly sum of the E for the whole period. Evaporation expresses the actual evaporation of the soil surface.

Difference of average annual Evaporation (E) for the years 2009-2019 compared to 2017-2019. Areas where the Evaporation values might have suffered anomalies in the last 3 years. Evaporation expresses the actual evaporation of the soil surface.

Transpiration

Unit = mm

Transpiration (average)

Transpiration (change)

Transpiration (anomalies)

Transpiration (average): 0/1,600 mm

Transpiration (change): -45/60 mm

Transpiration (anomalies): -45/60 mm

Average annual Transpiration (T) for the last three years on record 2017-2019. Transpiration expresses the actual transpiration of the vegetation canopy.

Annual trend Transpiration (T) changes for the years 2009-2019. Scale of the linear fit of the yearly sum of the T for the whole period. Transpiration expresses the actual transpiration of the vegetation canopy.

Difference of average annual Transpiration (T) for the years 2009-2019 compared to 2017-2019. Areas where the Transpiration values might have suffered anomalies in the last 3 years. Transpiration expresses the actual transpiration of the vegetation canopy.

Food and Agriculture Organization of the United Nations (FAO)

Source data

Food and Agriculture Organization (FAO)

Water Productivity through Open Access of Remotely sensed derived data

Description

Until December 2019 the base input layers (NDVI, albedo, and fAPAR) for the Level 2 (100 m) products were derived from the Proba-V satellite. Proba-V was decommissioned in June 2020. From January 2020 onwards the base input layers of NDVI, albedo and fAPAR for level 2 are derived from the Copernicus Sentinel-2 mission.

Spatial resolution

Pixel size:

100 m (0.000992 degrees)

Temporal resolution

Period of observations: January, 2009 – present

Aggregation: annual mean

The annual aggregation is derived from a dekadal product.

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