Linear models for estimating annual and growing season reference evapotranspiration using averages of weather variables

We develop linear regression equations to estimate location‐specific average annual reference evapotranspiration (ET o ) using one or more of annual averages of: incoming solar radiation ( R s ), air temperature ( T ), relative humidity (RH), and wind speed ( U ). We also provide two sets of equations to estimate growing season ET o , either using one or more of annual averages of R s , T , RH, and U , or using growing season averages of the...