Abstract
The errors associated with the Bowen ratio-energy balance (BREB) method are analysed, to determine analytically the reliable values of the Bowen ratio ( β) and of the latent and sensible heat fluxes. It is shown that, if advection is considered negligible, the BREB method is able to determine correctly the surface flux partitioning or the flux values when certain conditions, consistent with the flux-gradient relationship, are fulfilled. An analytical method to find the range of β around −1 that produce unacceptable flux calculations of latent and sensible heat is presented. It is based on an error analysis of the Bowen ratio and, rather than being fixed, this excluded region depends on the vapor pressure gradient measured in each averaging period and on the resolution limits of the sensors used.
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