Glint2 should provide surface temperature in both icy and ice-free areas.
PISM uses surface temperature in ice-free areas as a boundary condition for the heat equation modeling the temperature of the thin (~1 km) "thermal layer" of bedrock. This "bedrock thermal layer" covers the whole computational domain.
See the PISM's source code browser for details.
Right now the desm executable reports surface temperatures of 0 Kelvin in ice-free areas:
