Multi-layer model requires accurate information of vertical structure to realize its full potential in simulating gross primary production - Jiangliu Xie; Gaofei Yin; Shangrong Lin; Xiaozhou Xin; Hu Zhang; Xinjie Liu; Qinhuo Liu; Aleixandre Verger; Adrià Descals; Iolanda Filella; Josep Peñuelas (Agricultural and Forest Meteorology, 2026)