The thermal conductivity dependence on the ice content in a sandy soil for four different parameterisations. All parameterisations should be compared to the original parameterisation (blue line) with default values; SandFrozenC1 = 0.0016, SandFrozenC2 = 1.336, SandFrozenC3 = 0.00375 and SandFrozenC4 = 0.918.