WAPOR

Reference EvapoTranspiration/ Actual EvapoTranspiration and Interception

Parameter

Reference EvapoTranspiration

Unit = mm

Sub-parameters

Reference EvapoTranspiration (average)

Reference EvapoTranspiration (change)

Reference EvapoTranspiration (anomalies)

Represented range

Reference EvapoTranspiration (average): 0mm/ 3,500 mm

Reference EvapoTranspiration (change): -120/140 mm

Reference EvapoTranspiration (anomalies): -150/180 mm

Description

Average of the annual Reference EvapoTranspiration (RET) for the years 2017-2019. Reference EvapoTranspiration is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface.

Annual trend of the change of Reference EvapoTranspiration (RET) for the years 2009-2019. This map shows the scale of the linear fit of the yearly sum of the RET for the whole period. Reference EvapoTranspiration is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface.

Difference of average annual Reference EvapoTranspiration (RET) for the years 2009-2019 compared to 2017-2019. This map shows the areas where the RET values might have suffered anomalies in the last 3 years. Reference EvapoTranspiration is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface.

Actual EvapoTranspiration and Interception

Unit = mm

Actual EvapoTranspiration and Interception (average)

Actual EvapoTranspiration and Interception (change)

Actual EvapoTranspiration and Interception (anomalies)

Actual EvapoTranspiration and Interception (average): 0/1,600 mm

Actual EvapoTranspiration and Interception (change): -50/70 mm

Actual EvapoTranspiration and Interception (anomalies): -60/80 mm

Average of the annual Actual EvapoTranspiration and Interception (ETIa) for the years 2017-2019. The ETIa is the sum of the soil evaporation (E), canopy transpiration (T), and evaporation from rainfall intercepted by leaves (I).

Annual trend of the change of Reference EvapoTranspiration (RET) for the years 2009-2019. This map shows the scale of the linear fit of the yearly sum of the RET for the whole period. TReference EvapoTranspiration is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface.

Difference of average annual Actual EvapoTranspiration and Interception (ETIa) for the years 2009-2019 compared to 2017-2019. This map shows the areas where the ETIa values might have suffered anomalies in the last 3 years. The actual EvapoTranspiration and Interception (ETIa) is the sum of the soil evaporation (E), canopy transpiration (T), and evaporation from rainfall intercepted by leaves (I).

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 (100m) 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.

Page updated

Google Sites

Report abuse