Basal slipperiness and englacial rate factor of the Antarctic Ice Sheet
doi:10.5285/5987dbff-5028-4cd5-aab9-2a490d81dec1
Author: Gudmundsson, G.H
The data set contains values of basal slipperiness (C) and the rate factor (A) for the whole of the Antarctic Ice Sheet.

The slipperiness was estimated through model inversion from measurements of surface velocities (1) and ice thickness (2) using the ice-flow model Úa (3).

The ice was assumed to deform according to Glen's flow law with a stress exponent n=3.

Basal sliding was assumed to follow Weertman sliding law with m=3, with u_b = C tau^m, where u_b is the basal sliding velocity and tau the (tangential) basal traction.

References :

1. Rignot, E., Mouginot, J. & Scheuchl, B. Ice flow of the Antarctic ice sheet. Science 333, 1427-1430 (2011). DOI:10.1126/science.1208336

2. Fretwell, P. et al. Bedmap2: Improved ice bed, surface and thickness datasets for Antarctica. Cryosphere 7, 375-393 (2013). DOI:10.5194/tc-7-375-2013

3. Gudmundsson, G. H. Ice-shelf buttressing and the stability of marine ice sheets. Cryosph. 7, 647-655 (2013). DOI:10.1073/pnas.1512482112


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