Diurnal variations of (a) modeled irradiance, (b) leaf area index and (c) canopy stomatal conductance at leaf area index (<i>LAI</i>) = 5.0.

<p><i>Q<sub>o</sub></i> is the total irradiance above the canopy, <i>Q<sub>c</sub></i> is the irradiance absorbed by the entire canopy, and is separated into the irradiance absorbed by the sunlit leaves of the canopy (<i>Q<sub>sl</sub></i>) and irradiance absorbed by the shaded leaves of the canopy (<i>Q<sub>sh</sub></i>). <i>LAI<sub>sl</sub></i> and <i>LAI<sub>sh</sub></i> are the sunlit and shaded fractions of <i>LAI</i>, respectively. <i>G<sub>sc1</sub></i> and <i>G<sub>sc2</sub></i> are the canopy stomatal conductance calculated by the big-leaf and dual-leaf models, respectively; <i>G<sub>sc2</sub></i> is separated into the sunlit and shaded canopy stomatal resistance, <i>G<sub>sl</sub></i> and <i>G<sub>sh</sub></i>, respectively.</p>