Estimation of surface energy fluxes in vineyard using field measurements of canopy and soil temperature

摘要

A two-source energy balance model (TSM) has been applied over a drip- irrigated vineyard using soil and canopy radiometric temperature measured during the summer of 2007 in Central Spain. Flux estimations from the model compared well with semi-hourly and daytime values obtained by an eddy covariance flux tower installed at the same location during the experiment. The results support the ability of the two-source model to simulate the partitioning of surface energy fluxes under the low vegetation cover and semi-arid conditions of the experiment. However, the separation of crop transpiration and soil evaporation was unrealistic using the original model parameterization. Under water scarce conditions this is key information to assess the beneficial and non-beneficial fractions of the water applied to crop. For that reason, a complementary analysis to provide new insights into the application of the TSM under these specific conditions is proposed and the initial results are presented.