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Flux‐gradient relationships in the constant flux layer
Author(s) -
Dyer A. J.,
Hicks B. B.
Publication year - 1970
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49709641012
Subject(s) - flux (metallurgy) , richardson number , wind speed , eddy covariance , range (aeronautics) , constant (computer programming) , heat flux , sensible heat , meteorology , stability (learning theory) , mathematics , shear velocity , environmental science , atmospheric sciences , thermodynamics , physics , mechanics , materials science , heat transfer , turbulence , ecology , machine learning , computer science , metallurgy , composite material , biology , programming language , ecosystem
An analysis is made of the Monin‐Obukhov function Φ M in the familiar wind profile equation, using data from two recent expeditions to Gurley (New South Wales) and Hay (New South Wales). In one, the friction velocity u * is determined directly by the eddy correlation method, and in the other, conducted during mid‐winter when small heat‐fluxes were experienced, by the use of a friction coefficient applied to a low‐level wind. By collating with a similar earlier analysis for heat and water vapour transfer, the variations of Φ M , Φ H and Φ W with stability are presented in tabular form in the z/L range − 0.01 to − 1.0. Within this range the empirical relationships Φ M = (1 − 16 z/L ) −1/4 and Φ H, W = (1 − 16 z/L ) −1/2 , and the implied equality between Ri and z/L , are found to approximate the data to within a few per cent.