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Modelling forest transpiration from different perspectives
Author(s) -
Dekker S. C.,
Bouten W.,
Verstraten J. M.
Publication year - 2000
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/(sici)1099-1085(20000215)14:2<251::aid-hyp923>3.0.co;2-r
Subject(s) - transpiration , vapour pressure deficit , environmental science , canopy , atmospheric sciences , energy balance , leaf area index , calibration , hydrology (agriculture) , meteorology , ecology , mathematics , photosynthesis , statistics , geography , botany , biology , geology , geotechnical engineering
Forest transpiration models have been developed in different disciplines such as plant physiology, ecology, meteorology, hydrology and soil science. In the present study, three different types of model perspectives for transpiration control are used: leaf cooling, CO 2 assimilation and the combined energy and water balance. All three process‐orientated models are calibrated on measurements in a Douglas fir stand in the Netherlands. The performances of these models are equally good, although they have different complexities, different numbers of calibration parameters (ranging from 1 to 6) and the models are calibrated on different measurements (eddy correlation at canopy level or CO 2 measurements at leaf level). The resemblance of the model results is caused by the calibration procedure and by the high impact of radiation in all three cases. Significant discrepancies become apparent when differences between model responses are examined and when specific (short) periods are selected when input variables are uncoupled. The main differences between the models are caused by another formulation of leaf area index and vapour pressure deficit (VPD). Considerable differences in simulated transpiration occur in the afternoon as a result of the diurnal hysteresis between VPD and radiation. Copyright © 2000 John Wiley & Sons, Ltd.