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An intercomparison of three vegetation/soil models for a sparse vineyard canopy
Author(s) -
Van Hurk B. J. J. M. Den,
Verhoef A.,
Van Berg A. R. Den,
De Bruin H. A. R.
Publication year - 1995
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712152805
Subject(s) - vineyard , environmental science , canopy , vegetation (pathology) , remote sensing , geography , ecology , biology , medicine , archaeology , pathology
Three Soil‐Vegetation‐Atmosphere Transfer models simulating fluxes collected at a dry sparse vineyard site in La Mancha, Spain, are intercompared. the algorithms used to describe soil heat‐flux density, aerodynamic transfer of water and heat between the surface and the atmosphere, and crop evaporation all have a different physical basis in these models. A common feature of the models is that interaction of many processes takes place via the surface temperature. Large differences are found between the predicted soil heat‐flux densities, caused by a poor physical description of heat storage in the soil and by the choices of soil coefficient values. Significant differences in the parametrization of the aerodynamic transfer between the surface and the atmosphere also exist, with a clear impact on predictions of surface temperature. Crop evaporation is underestimated by models taking the effect of soil moisture depletion or atmospheric humidity deficit on crop resistance into account. A suggestion is made for an optimal choice of various model components to describe the observed fluxes best.