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Table of contents
Introduction
1. Glaciers
1.1 Glacier definitions
1.2 Glacier motion
1.2.1 Ice mechanics and rheology
1.2.2 Glacier flow
1.3 Drivers of velocity change over time
1.3.1 Ice temperature
1.3.2 Ice thickness and surface slope
1.3.3 Grounding line and ice front displacement
1.3.4 Basal friction
1.4 Summary
2. Satellite observations of the surface ice speed
2.1 Study areas
2.2 Velocity database
2.2.1 State of the art methods for deriving glacier surface displacements
2.2.1.1 Feature-tracking approaches and their limitations
2.2.1.2 SAR interferometry (InSAR) approaches
2.2.1.3 Axes of further development
2.2.2 Implementation of the ice velocity retrieval workflow
2.2.2.1 Used sensors
2.2.2.2 Automated velocity-tracking workflow
2.2.2.3 Uncertainties assignment
2.2.2.4 Data fusion and geo-database
2.2.3 Overview of the obtained database
2.2.3.1 Data quantity
2.2.3.2 Average precision and accuracy
2.2.3.3 Comparison with similar databases
2.2.3.4 Seasonal direction deviation
2.2.4 Post-processing of dense ice velocity time-series
2.2.5 Summary
2.3 Seasonal variations in surface speed on selected glacier in 2015-2019
2.3.1 Russell sector
2.3.1.1 Observed seasonal variations of the ice speed
2.3.1.2 Physical drivers of the seasonal dynamics
2.3.2 Petermann
2.3.2.1 Observed seasonal dynamics of the ice speed
2.3.2.2 Physical drivers of the seasonal dynamics
2.3.3 Upernavik Isstrøm
2.3.3.1 Observed seasonal dynamics of the ice speed 8/151
2.3.3.2 Physical drivers of the seasonal dynamics
3. Modelling of seasonal dynamics of glacier basal environment
3.1 Modelling approaches
3.2 Case study of the Russell sector: ice flow seasonal dynamics
Conclusion & perspectives
