Flux‐gradient relations near the ground in unstable conditions

Abstract Swinbank's observations at Kerang (February 1962) are used to estimate the variation with the stability parameter ζ(≡ z / L ) of the Monin‐Obukhov universal function φ M (≡ u ,∗︁ −1 kz δu/δ z ). A plot of Ri against ζ is used to derive the approximate variation of α (≡ φ M /φ H = K H / K M ) with ζ.