Underestimates of Grassland Gross Primary Production in MODIS Standard Products. - Xiaoyan Zhu; Yanyan Pei; Zhaopei Zheng; Jinwei Dong; Yao Zhang 004; Junbang Wang; Lajiao Chen; Russell B. Doughty; Geli Zhang; Xiangming Xiao (Remote. Sens., 2018)