Actual Evapotranspiration

Definition

ETa estimates the actual water evaporated from the soil and transpired by the vegetation at all stages of crop development and all levels of crop stress. (FAO 1998)

GEOGLAM Agriculture Indicator Category

Productivity

Agricultural Land Includes or is Indicated by

Each nationally relevant crop type, accounting for ~80% of total area under production, all irrigated crops or water managed crops

EAV Stewards

Benjamin Koetz

Bimal Bhattacharya

Jippe Hoogeveen

Within Season Requirements:

Application or Policy Supported	Related Variables	Frequency of Update	Spatial Unit
SDG 6.4, drought, climate adaptation, irrigation management	Water Productivity Land Surface Temperature Non-Perennial Crop Type Map, Perennial Crop Type Map, Crop Condition Assessment, Current Crop Stage,, Albedo Meteorological data: Precipitation Air temperature Surface Soil Moisture Root Zone Soil Moisture Incoming radiation Wind Speed Relative humidity Wide range of input depending on models used	Daily - monthly, within each season	Field / administrative unit

Application or Policy Supported

Frequency of Update

Spatial Unit

SDG 6.4, drought, climate adaptation, irrigation management

Daily - monthly, within each season

Field / administrative unit