Seismic investigations of firn in Antarctica ...

• Main Author: Hollmann, Hannes
• Format: Thesis
• Language: unknown
• Published: University of Tasmania 2024
• Subjects: Amery; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.25959/25661541; https://figshare.utas.edu.au/articles/thesis/Seismic_investigations_of_firn_in_Antarctica/25661541

The firn layer represents the natural interface between glacier ice and the atmosphere. Firn is a highly heterogeneous medium, where the interplay of physical processes on the microscale determines its evolution on the macro-scale. Determining firn characteristics provides insight into weather and climate history, active glacier processes, and knowledge of firn depth and density is crucial for the accurate assessment of ice mass changes of major ice sheets. Direct constraints on firn structure, however, are limited to a few locations in Antarctica as the acquisition of firn cores or borehole-based measurements has a high logistic cost. Seismic surveys are one example of a geophysical method that can be used to determine some firn properties, at a lower resolution, with efficiency in field logistics. Such surveys have the potential to improve the spatial coverage of firn measurements, particularly for Antarctica. The research documented in this thesis firstly investigates the firn layer of the Amery Ice ...