The importance of meteorological variables in the bias of Potential evapotranspiration estimates in Crete, southern Greece

摘要

Aim of the present study is to identify the importance of various meteorological variables in the absolute values of positive and negative bias of the estimates of the reference potential evapotranspiration (PET_(ref)) rates from two empirical equations in Crete, southern Greece.Daily values of PET_(ref) calculated by means of the standardised FAO Penman-Monteith equation in the meteorological station of Iraklio were used as a basis for the comparison between different methods. Wind velocity was detected as an important factor, yet it is the combination of various meteorological parameters that actually controls the magnitude of bias.