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LLLJP Wind Shear Formula (Power law)

The wind speed at a certain height above ground level is:

u=(u_ref)*((z/z_ref)^α)

where u and u_ref are the mean wind speeds at the heights z and z_ref, respectively. The assumption of a normal wind profile or the power law relation is a common approach used in the wind energy industry to estimate the wind speed u at a higher elevation (z) using surface (usually at 10 m) or tower measurements of wind speeds U_ref at reference height z_ref. The shear exponent (α) is typically assumed to be equal to 0.2.