are tested: Method I (MI) that uses the same flow
law parameter, A, as in the two studies discussed above, im-
plicitly including basal sliding, and Method II (MII) that in-
cludes a Weertman
type sliding law (Paterson, 1994) where
the sliding velocity is assumed to be proportional to a power
of the basal shear stress, τb, (Vslid =C · τmb ); C is the slid-
ing parameter and the exponent m= 3 in our
/media/ces/Adalgeirsdottir-etal-tc-5-961-2011.pdf