Inversion for basal friction coefficients with a 2D flow line thermo-coupled model employing ice surface temperature inversions from borehole data

The inversion for basal friction coefficients was performed by a 2D flow line thermo-coupled model (Pattyn, 2000) for fast flowing ice streams on the south side of the Academy of Sciences Ice Cap in the Komsomolets Island, Severnaya Zemlya archipelago. The input data for the performance of both the forward and the inverse problems included InSAR ice surface velocities, ice surface elevations and ice thicknesses obtained by airborne measurements, all were taken from Dowdeswell et al. (2002). Tikhonov's regularization was applied for the basal friction coefficients inversions. Modeled ice temperature distributions in the cross-sections have been obtained using the ice surface temperature histories that were inverted previously from the bore hole temperature profiles derived at the Academy of Sciences Ice Cap. The basal friction coefficients inversions have been corrected for the modeled ice temperature distributions.