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Examination of two methods for estimating regional evaporation using a coupled mixed layer and land surface model
Author(s) -
Kim Cornelis P.,
Entekhabi Dara
Publication year - 1997
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/97wr01564
Subject(s) - evaporation , evapotranspiration , surface (topology) , boundary layer , environmental science , satellite , layer (electronics) , surface layer , mixed layer , atmospheric sciences , meteorology , climatology , geology , mathematics , materials science , thermodynamics , physics , geometry , composite material , ecology , astronomy , biology
The Priestley and Taylor [1972] method (PT) and the complementary relationship (CR) introduced by Bouchet [1963] for the estimation of extended area or regional evapotranspiration are examined using a model of the coupled interactions between the mixed layer and the land surface. The model is shown to be in good agreement with observations from the First International Satellite Land Surface Climatology Project Field Experiment. It appears that the parameter α in the PT is slightly lower than the suggested constant value 1.26 and is quite insensitive to the growth of the boundary layer. We find some support for the CR but do not resolve the problem of estimating the potential evaporation under unstressed conditions.