Wind speed is normally supplied as a measured time series but it can be substituted by a constant parameter value if it is not available (see switch WSpeedInput). Wind speeds less than 0.1 mm/s are rejected and replaced by this lower limit. If the wind speed is given at another reference height than the air temperature and air humidity, it can be estimated at the reference height of air temperature – if the switch “Stability Correction”is set to Monin-Obukhov Length.