Evaluation of leaf‐to‐canopy upscaling methodologies against carbon flux data in North America

Despite the wide acceptance of the “big‐leaf” upscaling strategy in evapotranspiration modeling (e.g., the Penman‐Monteith model), its usefulness in simulating canopy photosynthesis may be limited by the underlying assumption of homogeneous response of carbon assimilation light‐response kinetics through the canopy. While previous studies have shown that the separation of the canopy into sunlit and shaded parts (i.e., two‐leaf model) is …