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Equilibrium evaporation beneath a growing convective boundary layer

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Abstract

Expressions for the equilibrium surface Bowen ratio (β s ) and equilibrium evaporation are derived for a growing convective boundary layer (CBL) in terms of the Bowen ratio at the top of the mixed layerβ i and the entrainment parameter A R . If AR is put equal to zero, the solution forβ s becomes-that previously obtained for the zero entrainment or ‘closed box’ model. The Priestley-Taylor parameter α is also calculated and plotted in terms ofA R andβ i . Realistic combinations of the atmospheric parameters give values of α in the range 1.1 to 1.4.

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Authors and Affiliations

  1. Institute of Hydrology, OX10 8BB, Wallingford, Oxon, UK

    Alistair D. Culf

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  1. Alistair D. Culf
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Culf, A.D. Equilibrium evaporation beneath a growing convective boundary layer. Boundary-Layer Meteorol 70, 37–49 (1994). https://doi.org/10.1007/BF00712522

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  • DOI: https://doi.org/10.1007/BF00712522

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