Modeling subglacial erosion processes – the fingerprint of glaciers

PhD defence, Friday 8 September 2017. Sofie Vej Ugelvig.

2017.09.08 | Steffi Hjerrild Iversen

Sofie Vej Ugelvig

During her studies, Sofie Vej Ugelvig researched the development of glacial landscapes in the Earth’s mountain ranges during the past million years. The focus was to bridge the scales between theoretical models for erosion under ice and larger scale landscape evolution models that integrate erosion over hundred thousand to millions of years.

Using numerical models, Sofie Vej Ugelvig parameterized first-order controls on glacial erosion processes. The results point to seasonal shifts in meltwater drainage and sediment concentration in the bottom of the ice as important factors in determining the erosive power of glaciers. Moreover, it was shown that physically based erosion laws can help explain the observed correlations between erosion rates and glacial parameters such as sliding speed and glacier size.  

The research findings contribute to the understanding of subglacial erosion processes and emphasize the importance of improving the link between theoretical models for glacial erosion and landscape evolution models.

The PhD degree was completed at the Department of Geoscience, Science and Technology, Aarhus University.

This résumé was prepared by the PhD student.


Time:
Friday 8 September 2017, at 13.15
Place: Building 1671, room 137, Auditorium, Department of Geoscience, Aarhus University
Title of dissertation: Numerical Modeling of Subglacial Processes
Contact information: Sofie Vej Ugelvig, e-mail: sofie.ugelvig@geo.au.dk, tel.: 0045 6170 2401
Members of the assessment committee:
Professor Bernard Hallet, Department of Earth and Space Sciences, University of Washington, USA
Professor Kelly R. MacGregor, Department of Geology, Macalester College, USA
Professor Christian Tegner (chair), Department of Geoscience, Aarhus University
Main supervisor:
Professor David L. Egholm, Department of Geoscience, Aarhus University
Language: The PhD dissertation will be defended in English

The defence is public.
The dissertation is available for reading at the Graduate School of Science and Technology/GSST, Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C.

 

 

PhD defence
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Revised 19.09.2017