Updating Norway’s glacial lake extents in 2023–2024 using Sentinel-1 & Sentinel-2 data and machine learning
Andreassen, Liss Marie
Glacial lakes are increasing in number and size worldwide, posing growing risks for outburst floods. Norway’s last glacial lake inventory used semi-automatic mapping on Sentinel-2 imagery from 2018–19. In this study, we test a more automated and reproducible workflow for updating glacial lake extents in Norway using Sentinel-2 and Sentinel-1 satellite imagery and a Random Forest classifier. Here, glacial lakes are defined as water bodies within 200 m of glaciers larger than 0.1 km 2 with a minim