Friction velocity

Calculate the friction velocity of the underground.

turb_ustar(...)

# S3 method for numeric
turb_ustar(v, z, z0, ...)

# S3 method for weather_station
turb_ustar(weather_station, ...)

Arguments

...	Additional parameters passed to later functions.
v	Windspeed in height of anemometer in m/s.
z	Height of anemometer in m.
z0	Roughness length in m.
weather_station	Object of class weather_station

Value

Friction velocity in m/s.