Businger–Dyer relationship

A similarity relationship between surface flux of a variable and the mean vertical profile of that variable.

These are generically of the form

where M is mean wind speed, u_* is the friction velocity (a term representing the momentum flux), k is von Kármán's constant, z is height above ground, d is displacement distance, z₀ is roughness length, ψ is an empirical stability correction term, and L is the Obukhov length.
Stull, R. B. 1988. An Introduction to Boundary Layer Meteorology. 666 pp.

1. The study of the physics, chemistry, and dynamics of the earth's atmosphere, including the related effects at the air–earth boundary over both land and the oceans. Fundamental topics include the composition, structure, and motion of the atmosphere. The goals ascribed to meteorology are the complete understanding and accurate prediction of atmospheric phenomena.