Abstract: AbstractWhile evapotranspiration (ET) is normally measured as one hydrologic component, evaporation (E), and transpiration (T) result from different physical‐biological processes. Using a two‐source model, a trapezoid framework has been widely applied in recent years. The key to applying the trapezoid framework model is the determination of the dry/wet boundaries of the land surface temperature‐fractional vegetation coverage trapezoid (LST‐fc). Although algorithms have been developed to characterize the two boundaries, there remains a s...
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