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Resource Basic Information
  Resource Id: urn:geoss:csr:resource:urn:uuid:23e4231f-0a6f-401e-bc24-bb0e14478a48
  Name: Global Evapotranspiration
  Abbreviation: Global Evapotranspiration
  Description: The objective of this study was to generate a global long-term (1983-2006) daily ET record with well quantified accuracy for studies on regional/global water balances changes. We applied a satellite remote sensing based evapotranspiration (ET) algorithm to assess global terrestrial ET. The algorithm quantifies canopy transpiration and soil evaporation using a modified Penman-Monteith approach with biome-specific canopy conductance determined from the NDVI, and quantifies open water evaporation using a Priestley-Taylor approach. These algorithms were applied globally using AVHRR GIMMS NDVI, NCEP/NCAR Reanalysis (NNR) daily surface meteorology and NASA/GEWEX Surface Radiation Budget (SRB) Release-3.0 solar radiation inputs. We used observations from FLUXNET tower sites representative of the major global vegetation types to parameterize an NDVI-based canopy conductance model and then validated the global ET algorithm using measurements from additional, independent flux towers.
  GEO Member or Participating Organisation :
United States
  Responsible Organisation: The University of Montana
  Resource Information URL: http://ntsg.umt.edu/project/et
  Resource Interface URL:
Resource Contact Information
  Contact Name: Dr. John Kimball
  Contact Email: johnk@ntsg.umt.edu
Resource Category
  datasets
Societal Benefit Areas
  Climate
  Energy
  Water
Resource Status
  continuousOperation
GEOSS Data Core
  No GEOSS Data Core Indicator selected
Ontology Reference
  No Ontology Information Available
Standard Classification
  No Standard Classification Information selected for this resource
Standard Supportive
  No Standard Supportive Information selected for this resource
Last Update Date
  2011-04-15
Date Modified
  2011-04-15