Published January 23, 2025
| Version v4.2
Dataset
Open
GLEAM4
Description
The Global Land Evaporation Amsterdam Model (GLEAM) is a set of algorithms that separately
estimate the different components of terrestrial evaporation (i.e. 'evapotranspiration') based on
satellite observations: transpiration (Et), interception loss (Ei), bare-soil evaporation (Eb), snow
sublimation (Es) and open-water evaporation (Ew). Intermediate outputs of the model include
potential evaporation (Ep), root-zone soil moisture (SMrz), surface soil moisture (SMs), evaporative
stress (S), and surface sensible heat flux (H). The rationale of the method is to maximize the recovery
of information about evaporation contained in the available data stack of climatic and environmental
observations from space.Compared to previous GLEAM versions, GLEAM4 includes the following updates:
estimate the different components of terrestrial evaporation (i.e. 'evapotranspiration') based on
satellite observations: transpiration (Et), interception loss (Ei), bare-soil evaporation (Eb), snow
sublimation (Es) and open-water evaporation (Ew). Intermediate outputs of the model include
potential evaporation (Ep), root-zone soil moisture (SMrz), surface soil moisture (SMs), evaporative
stress (S), and surface sensible heat flux (H). The rationale of the method is to maximize the recovery
of information about evaporation contained in the available data stack of climatic and environmental
observations from space.Compared to previous GLEAM versions, GLEAM4 includes the following updates:
- Hybrid learning of evaporative stress from eddy-covariance and sapflow data
- Improved representation of interception, including short vegetation
- Potential evaporation based on Penman's instead of Priestley and Taylor's equation
- Explicit consideration of plant access to groundwater
- Higher spatial resolution (0.1°) and longer record (1980–2023)
GLEAM4.2a data are accesible via www.gleam.eu.
Files
README_GLEAM4.2.pdf
Files
(113.0 GB)
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Additional details
Funding
- Belgian Federal Science Policy Office
- SR/02/402
- Belgian Federal Science Policy Office
- SR/02/377
- Belgian Federal Science Policy Office
- SR/00/373
- European Space Agency
- 4000129870/20/I-NB
- European Space Agency
- 4000136272/21/I-EF
- European Space Agency
- 000136272/21/I-EF
- European Research Council
- 101088405