Journal
TREE PHYSIOLOGY
Volume 22, Issue 15-16, Pages 1065-1077Publisher
OXFORD UNIV PRESS
DOI: 10.1093/treephys/22.15-16.1065
Keywords
biocomplexity; biosphere-atmosphere interactions; canopy photosynthesis; ecophysiology; evaporation
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This paper focuses on how canopy structure, its physiological functioning and the environment interact to control and drive the exchange of carbon dioxide (CO2) and water vapor between a temperate forest stand and the atmosphere. First, we present an overview of how temporal and spatial variations in canopy structure (e.g., leaf area index, species, leaf inclination angles, leaf clumping) and physiological functioning (e.g., maximal stomatal conductance, photosynthetic capacity) modulate CO2 and water vapor fluxes. Then, with the biophysical model CANOAK, we quantify the effects of leaf dimension and thickness, vertical variations in leaf area and photosynthetic capacity, leaf clumping, leaf inclination angles, photosynthetic capacity, stomatal conductance and weather on the annual SUMS of CO2, water vapor and sensible heat exchange. Finally, we discuss how much detail is needed in a model to predict fluxes of Co-2 and water vapor with acceptable fidelity.
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