The findings in this study suggest a fundamental modification of FAO P-M formula by considering the inclusion of MECs in the energy term.
Varmaghani, A., Eichinger, W. E., & Prueger, J. H. (2018). Modification of FAO Penman-Monteith Equation for Minor Components of Energy. Hydrology Research, 50(2), In Press. doi: 10.2166/nh.2018.093.