The wind profile power law is a relationship between the wind speeds at one height, and those at another. The power law is often used in wind power assessments where wind speeds at the height of a turbine (>~ 50 meters) must be estimated from near surface wind observations (~10 meters), or where wind speed data at various heights must be adjusted to a standard height prior to use. Wind profiles are generated and used in a number of atmospheric pollution dispersion models. The wind profile power law relationship is: u/ur = (z/zr)α ux = ur(zx/zr)α