This data set is only available for a restricted user group, please contact us if you want to access these data.
RESTRICTED only accessable in CEN/MPI net or via CliSAP login What does that mean?
GLEAM stands for Global Land Evaporation Amsterdam Model and describes a suite of algorithms that separately estimate the different components of the terrestrial evaporation. This is done based on data from various satellite observations and atmospheric re-analyses.
Estimated are the actual evaporation and its components (see parameters) as well as the evaporative stress factor. Among the components are, e.g., the potential evaporation which is computed from surface net radiation and near-surface air temperature data using a Priestley & Taylor equation. By means of the evaporative stress factor, which is based on computations of vegetation optical depth from microwave observations and simulated root-zone soil moisture content, the actual evaporation is derived. The root-zone soil moisture is calculated using a multi-layer running water balance model which uses observed precipitation as input and which assimilates soil moisture observations. Rainfall and vegetation characteristics are used together with observed precipitation in a Gash analytical model for the estimation of the interception loss.
For more information we refer to the references.
We offer GLEAM v3.3a. This product covers the longer time period of the two latest GLEAM products. The other product, v3.3b, covers basically the observation period of MODIS, and is available via www.GLEAM.eu.
Last update of this data set at ICDC: May 23, 2019
Period and temporal resolution:
Coverage and spatial resolution:
This data set does not contain any uncertainty information.
Details about the accuracy and the representativity of the data sets can be found under www.GLEAM.eu and in the README document. The latter includes, for instance, a list of relevant literature, which is extended compared to the references, an overview about the input data sets in Table 1, and information about the most relevant changes compared to version v3.2 and version v3.1.
Among the possibly most relevant changes are (v3.3a versus v3.2a):
Among the possibly most relevant changes were (v3.2a versus v3.1a):
Upon using this data please cite as follows:
Martens, B., Miralles, D. G., Lievens, H., van der Schalie, R., de Jeu, R. A. M., Fernandez-Prieto, D., Beck, H. E., Dorigo, W. A., and Verhoest, N. E. C., GLEAM v3: satellite-based land evaporation and root-zone soil moisture, Geoscientific Model Development, 10, 1903-1925, doi:10.5194/gmp-10-1903-2017, 2017
Miralles, D. G., Holmes, T. R. H., De Jeu, R. A. M., Gash, J. H., Meesters, A. G. C. A., and Dolman, A. J., Global land-surface evaporation estimates from satellite-based observations, Hydrology and Earth System Sciences, 15, 453-469, doi:10.5194/hess-15-453-2011, 2011
GLEAM v3.3a accessed from www.GLEAM.eu May 8 2019, provided with transposed coordinates as daily files comprising all parameters by the Integrated Climate Data Center (ICDC, icdc.cen.uni-hamburg.de)