Global parameterization and validation of a two‐leaf light use efficiency model for predicting gross primary production across FLUXNET sites

Abstract Light use efficiency (LUE) models are widely used to simulate gross primary production (GPP). However, the treatment of the plant canopy as a big leaf by these models can introduce large uncertainties in simulated GPP. Recently, a two‐leaf light use efficiency (TL‐LUE) model was developed to simulate GPP separately for sunlit and shaded leaves and has been shown to outperform the big‐leaf MOD17 model at six FLUX sites in China. In …