Fig. 4. Results from inverse modeling of convective heat transport, which show (a) the sensitivity to water flux of the measured temperatures at TW-3, which were best approximated by a flux value of 0.35 m yr^–1, and (b) the sensitivity of modeling results to thermal conductivity using a flux value of 0.35 m yr^–1. The undefined thermal conductivity (Kt = Undefined) would be the profile for any conductivity under a no-flow boundary condition.