The thermal conductivity dependence on the ice content in a clay soil for four different parameterisations. All parameterisations should be compared to the original parameterisation (blue line) with default values; ClayFrozenC1 = 0.0014, ClayFrozenC2 = 1.32, ClayFrozenC3 = 0.0036 and ClayFrozenC4 = 0.8743.