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 Ua (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.