Global 500M Spatial Resolution Gross and Net Primary Productivity Products Based on an Improved Light Use Efficiency Model from 2000-2019 - Zhang, Helin; Sun, Rui; Xiao, Zhiqiang; Wang, Juanmin; Wang, Mengjia (IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium, Geoscience and Remote Sensing Symposium, IGARSS 2022 - 2022 IEEE International, 2022)