Ground Surface Temperature tab on Ground Domain Dialog.
Check this option if the Kusuda-Achebach correlation is to be used. If this option is not selected then data from the Ground shallow temperatures are used.
The annual average surface temperature to be applied to the Kusuda-Achenbach farfield boundary temperature correlation (in °C or °F)
The annual mean surface temperature variation from average used in determining the farfield boundary condition (in °DeltaC or °DeltaF)
The phase shift of minimum surface temperature, or the day of the year when the minimum surface temperature occurs (in days).