foxes.utils.abl.stable.ustar(ws_ref, h_ref, z0, mol, kappa=0.41)[source]

Calculates the friction velocity, based on reference data.

Parameters

ws_ref: float

The reference wind speed

h_ref: float

The reference height

z0: float

The roughness length

mol: float

The Monin-Obukhov height

kappa: float

The von Karman constant

Returns

ustar: float

The friction velocity