Mean velocity profile in a sheared and thermally stratified atmospheric boundary layer.

Journal Article

A stability correction function φ(m)(ζ) that accounts for distortions to the logarithmic mean velocity profile (MVP) in the lower atmosphere caused by thermal stratification was proposed by Monin and Obukhov in the 1950s using dimensional analysis. Its universal character was established from many field experiments. However, theories that describe the canonical shape of φ(m)(ζ) are still lacking. A previous link between the spectrum of turbulence and the MVP is expanded here to include the effects of thermal stratification on the turbulent kinetic energy dissipation rate and eddy-size anisotropy. The resulting theory provides a novel explanation for the power-law exponents and coefficients already reported for φ(m)(ζ) from numerous field experiments.

Full Text

Duke Authors

Cited Authors

  • Katul, GG; Konings, AG; Porporato, A

Published Date

  • December 23, 2011

Published In

Volume / Issue

  • 107 / 26

Start / End Page

  • 268502 -

PubMed ID

  • 22243189

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

Digital Object Identifier (DOI)

  • 10.1103/PhysRevLett.107.268502

Language

  • eng

Conference Location

  • United States