The evolving surface elevation of mountain glaciers and ice sheets is measured with ever increasing precision. However, interpreting this signal presents scientific challenges. Atmospheric, oceanic, and ice dynamic processes imprint themselves as spatially, temporally complex patterns of surface-elevation change that may obscure the signature of individual physical forcings.

This session invites contributions that advance our understanding of the discrete physical processes that drive land ice elevation change. It will showcase research that parses glacier and ice-sheet elevation change on various spatial and temporal scales, tackling hard problems associated with debris cover, subglacial erosion/deposition, and firn. Studies that reduce uncertainty in observations and models, feature data assimilation, and/or use machine learning for spatial and temporal continuity are encouraged.

We welcome contributions associated with spaceborne laser altimetry, and the NASA Snow4Flow mission, which integrates airborne geophysical measurements, in situ validation, and models of snow input and ice output to Northern Hemisphere glaciers.

• G - Geodesy