HR: 17:30h
AN: C54A-07    [Abstracts]
TI: Subglacial Depositional Processes from Wireless Subglacial Probe Experiments.
AU: * Hart, J K
EM: jhart@soton.ac.uk
AF: School of Geography, University of Southampton, Southampton, Southampton, SO17 1BJ, United Kingdom
AU: Martinez, K
EM: km@ecs.soton.ac.uk
AF: School of Electronics and Computer Science, University of Southampton, Southampton, Southampton, SO17 1BJ, United Kingdom
AB: An understanding of the subglacial environment is vital to our understanding of the relationship between glacier dynamics and climate change. In recent years, great advances have been made in our understanding of the subglacial environment, by direct in situ experiments. We show the results associated with subglacial depositional processes from a new wireless subglacial probe installed beneath Briksdalsbreen, Norway that behaved like a clast within the subglacial environment. The results include: a) an annual pattern of basal sliding and subglacial deformation, indicating early summer lodgement and late summer deformation; b) The amount and nature of clast rotation within the deforming layer, with implications for till sedimentation and till fabric production; c) Evidence for subglacial deformation over a wide range of basal shear stresses, which indicates the style of subglacial behaviour.
UR: http://www.glacsweb.org
DE: 0720 Glaciers
DE: 0776 Glaciology (1621, 1827, 1863)
DE: 0794 Instruments and techniques
SC: Cryosphere [C]
MN: 2007 Fall Meeting