Estimating Evapotranspiration from readily obtainable variables using the Vegetation Index-Temperature Trapezoid Concept: A case study in Oklahoma, U.S.A.

Ali Levent Yagci, NASA Goddard Space Flight Center, Hydrological Sciences Laboratory - 617, Greenbelt, MD, United States and Joseph A Santanello Jr, NASA Goddard Space Flight Center, Code 617, Hydrological Sciences Laboratory, Greenbelt, MD, United States