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

Q_o is the total irradiance above the canopy, Q_c is the irradiance absorbed by the entire canopy, and is separated into the irradiance absorbed by the sunlit leaves of the canopy (Q_sl) and irradiance absorbed by the shaded leaves of the canopy (Q_sh). LAI_sl and LAI_sh are the sunlit and shaded fractions of LAI, respectively. G_sc1 and G_sc2 are the canopy stomatal conductance calculated by the big-leaf and dual-leaf models, respectively; G_sc2 is separated into the sunlit and shaded canopy stomatal resistance, G_sl and G_sh, respectively.