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Research article, 1999

Test of a modified Shuttleworth-Wallace estimate of boreal forest evaporation

Iritz Z, Lindroth A, Heikinheimo M, Grelle A, Kellner E


A modified version of the two-layer Shuttleworth-Wallace approach was used to simulate evaporation from a mixed 50-100 years oldboreal forest stand in central Sweden. It was tested against eddy correlation flux measurements from the Northern hemisphere climate Processes land-surface Experiment (NOPEX). The soil regulation on canopy resistance was taken into account when estimating transpiration. The generality of the model performance was attained by using model parameters that represented typical boreal forest stand and not the specific stands at the site. The analysis was done for two growing seasons, 1994 and 1995 having quite different weather conditions. Despite the rough parameterisation, the model performance was good. Problems regarding representativity of the measured data used for the model validation are discussed. It was concluded that the model could accurately simulate evaporation components on a seasonal time scale and is suitable to he incorporated as a submodel in larger forest ecosystem models. (C) 1999 Elsevier Science B.V. All rights reserved

Published in

Agricultural and Forest Meteorology
1999, Volume: 98-9, pages: 605-619

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    UKÄ Subject classification

    Fish and Aquacultural Science
    Environmental Sciences related to Agriculture and Land-use
    Forest Science
    Renewable Bioenergy Research

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