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Some comparisons between observed wind profiles at Risø and theoretical predictions for flow over inhomogeneous terrain
Author(s) -
Petersen E. L.,
Taylor P. A.
Publication year - 1973
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.49709942011
Subject(s) - terrain , mixing (physics) , turbulence , roughness length , mechanics , surface finish , flow (mathematics) , meteorology , surface roughness , geology , wind speed , statistical physics , atmospheric sciences , environmental science , physics , wind profile power law , thermodynamics , materials science , geography , cartography , quantum mechanics , composite material
Velocity profiles observed in near neutral conditions at the Risø 125 m tower are presented. The upwind terrain contains, depending on wind direction, either one or two distinct changes in surface roughness. Comparisons are made between the observed profiles and those predicted using models based on mixing‐length theory, and, in the case of a single roughness change, the turbulent energy equation. Comparisons with the mixing‐length model are moderately good but some features of the observed profiles are missing from the theoretical predictions. The particular turbulent energy equation model used appears to give slightly less accurate predictions than the mixing‐length model.