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Table 2 Model fits of leaf stomatal conductance improve when a circadian oscillator is included

From: Circadian rhythms have significant effects on leaf-to-canopy scale gas exchange under field conditions

  1. Results of fitting the stomatal conductance models proposed by [28] (Med), [29] (Leu), [30] (Bal, indicated in blue), excluding and including minimal conductance (g0, in purple, a fitting parameter across models, see Analyses), and excluding and including a circadian oscillator (Osc, in red). Data used for calibration (Cal) and validation (Val) are indicated by the colors green (entire data set from Fig. 1b, All), brown (under changing conditions, last 48 h in Fig. 1b, Cha), or orange (under constant conditions, first 24 h in Fig. 1d, Con). Values in bold indicate the best-fit model for each combination of calibration/validation data sets. Models were assessed by R2, the Akaike Information Criterion (AIC), AIC reduction (∆AIC) and the weight of each model (wi). The model with the smallest ∆AIC and largest wi is considered the most plausible [32]. Regardless of the data set, inclusion of a circadian oscillator rendered the models more plausible