Measurements of ice deformation at the confluence area of Unteraargletscher Bernese Alps, Switzerland

An experimental study of ice deformation at the confluence area of Unteraargletscher, Bernese Alps, Switzerland, has been carried out. Surface velocities were measured by repeatedly surveying stakes and with the use of remote-sensing methods. The variation of the vertical strain rates with depth was...

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Bibliographic Details
Published in:Journal of Glaciology
Main Authors: Gudmundsson, Hilmar, Iken, Almut, Funk, Martin
Format: Article in Journal/Newspaper
Language:unknown
Published: International Glaciological Society 1997
Subjects:
Online Access:https://nrl.northumbria.ac.uk/id/eprint/38151/
https://doi.org/10.3189/S0022143000035152
Description
Summary:An experimental study of ice deformation at the confluence area of Unteraargletscher, Bernese Alps, Switzerland, has been carried out. Surface velocities were measured by repeatedly surveying stakes and with the use of remote-sensing methods. The variation of the vertical strain rates with depth was measured in boreholes. The confluence center line is subjected to longitudinal horizontal extension, which is exceeded in magnitude by a concomitant transverse compression. Vertical strain rates change from positive (extension) at the surface to negative (compression) in the lowest layers of the glacier.