Seasonal snow depth dataset over flat terrains in the Northern Hemisphere based on ICESat-2 data from 2018 to 2020. - Feng, Dongdong; Che, Tao; Wang, Guigang; Dai, Liyun; Gao, Liang; Jiang, Ye; Wang, Jing; Hu, Yanxing; Xiao, Lin; Shi, Yueling (International Journal of Digital Earth, 2025)