Measurement of strain-rate components in a glacier with embedded inclinometers
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Date
2012Type
- Journal Article
Abstract
We present measurements with inclinometer/magnetometer probes inserted in glacier ice, and discuss the underlying mathematical theory to extract velocity-gradient components from these data. Assumptions concerning the ice flow field must be made to reduce the number of unknowns and to close the system of equations obtained from the theory. With the incompressibility assumption and the first-order plane-strain approximation, the evolution equation for the tilt of the main sensor axis can be solved exactly and the obtained function can be fitted to measured data to obtain optimal shear and normal strain components. Daily variations superposed on the tilt evolution reflect variations in sliding and perhaps partial elastic recovery of deformations. Show more
Publication status
publishedExternal links
Journal / series
Journal of GlaciologyVolume
Pages / Article No.
Publisher
International Glaciological SocietyOrganisational unit
08726 - Funk, Martin (Tit.-Prof.)
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