Comparison of big-leaf and two-leaf light use efficiency models for GPP simulation after considering a radiation scalar

Light use efficiency (LUE) models, mainly including the big-leaf (BL) and two-leaf (TL) categories, are efficient approaches to simulate gross primary productivity (GPP). Recently, a TL LUE model considering a radiation scalar (RTL-LUE) was developed, which improved the GPP simulation and unified the same model structure with the BL models using only one maximum LUE. However, whether the radiation scalar is suitable for BL models is still …