Abstract
AbstractThe importance of choosing a relatively detailed parameterisation for plant transpiration in semi‐arid terrains is evidenced by comparison of model results and observations from a European field experiment recently performed in La Mancha (Spain). In severe drought periods the contribution of the vegetation cover to the total latent heat flux is greater, since the evaporation from the bare soil fraction is small. Also, the observed heterogeneity of vegetation types in semi‐arid regions, such as the Iberian peninsula, is an additional argument to recommend the inclusion of somewhat sophisticated parameterisations in mesoscale models. A set of sensitivity tests and different formulations for the stomatal resistance illustrates fairly well the importance of the vegetation properties in regions where plants are scarce.
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