Abstract
The limiting surface Bowen ratios are calculated which maintain mixed-layer saturation pressure and relative humidity, both with and without boundary-layer entrainment. The equations are formally the same as those of Culf (1994) for equilibrium evaporation, but differ numerically because the coefficients are calculated at the mixed-layer saturation temperature (at the lifting condensation level) rather than at the surface temperature. The diurnal cycle over land is used to illustrate the value of these constraints.
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Betts, A.K. Relation between equilbrium evaporation and the saturation pressure budget. Boundary-Layer Meteorol 71, 235–245 (1994). https://doi.org/10.1007/BF00713740
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DOI: https://doi.org/10.1007/BF00713740