The role of lateral drag in the dynamics of Ice Stream B, Antarctica
Open Access
- 1 January 1997
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Glaciology
- Vol. 43 (144) , 231-237
- https://doi.org/10.1017/s0022143000003178
Abstract
The partitioning of resistive force between the bed and sides of Ice Stream B, Antarctica, is obtained for three large areas that have been measured using repeat aerial photogrammetry. Problems associated with data errors and local variations in ice strength and velocity are reduced by considering the areally averaged budget of forces for each photo block. Results indicate that the bed under Ice Stream B must be very weak and unable to provide much resistance. Mechanical control on this ice stream emanates almost entirely from the lateral margins.Keywords
This publication has 19 references indexed in Scilit:
- Development of fabric in iceCold Regions Science and Technology, 1994
- Evaluation of strain rates on Ice Stream B, Antarctica, obtained using GPS phase measurementsAnnals of Glaciology, 1994
- Changes in the West Antarctic Ice SheetScience, 1991
- Rheological nonlinearity and flow instability in the deforming bed mechanism of ice stream motionJournal of Geophysical Research, 1991
- Satellite-Image-Derived Velocity Field of an Antarctic Ice StreamScience, 1991
- Force Budget: III. Application to Three-dimensional Flow of Byrd Glacier, AntarcticaJournal of Glaciology, 1989
- Force Budget: I. Theory and Numerical MethodsJournal of Glaciology, 1989
- Ice dynamics at the mouth of ice stream B, AntarcticaJournal of Geophysical Research, 1987
- Seismic measurements reveal a saturated porous layer beneath an active Antarctic ice streamNature, 1986
- Flow law for polycrystalline ice in glaciers: Comparison of theoretical predictions, laboratory data, and field measurementsReviews of Geophysics, 1981