Multi-platform, Multi-scale and Multi-temporal 4D Glacier Monitoring. The Rutor Glacier Case Study

Abstract At present most alpine glaciers are not in equilibrium with the current climate, as a result they undergoing dramatic mass loss. Monitoring glacial variations is crucial to assess consequences of climate change on territory. In this work different geomatics techniques exploited measure and monitor Rutor glacier over years. study two were adopted generate 3 digital surface models (DSMs): aerial satellite photogrammetry. Two photogrammetric surveys carried out: at end hydrological year 2019/20 following year. Additionally, very high-resolution stereo pair, acquired by Pléiades-1A platform 2017, was processed whether images can be applied extract 3D glacier. order evaluate mass-balance throughout years several reference points positioned measured before 2021 flight. Thanks presence materialized model considered ‘Reference Model’ against which subsequent compared for analysis. This validated means comparison authoritative Regional DSM based LiDAR surveys. glaciers, positioning artificial square cross target time invariant areas enable multitemporal 4D The use imagery allows large mapped 3D, but lower accuracies proportionally decreasing respect slope exposure.