Estimation of aerodynamic parameters under non-neutral stability conditions from Alpilles measurement data

Wenguang G. Zhao, Albert Olioso*, Jean Pierre Lagouarde, Jean Marc Bonnefond, Mark Irvine, Yann Kerr, John McAneney, Olivier Marloie

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Aerodynamic parameters (displacement height d and roughness length for momentum z0), as well as friction velocity u. and temperature scaling parameter T., were estimated from the Alpilles energy balance measurement data. Air temperature and wind speed measurements at two heights and sensible heat flux data were needed in the estimation. Application of this method to two data sets measured in different ways for the temperature gradients found that the estimation of d and z0 was applicable only when the temperature gradients were measured differentially. Sensitivity tests showed that the estimated d and z0 were sensitive to the temperature gradients. However, both of the data sets produced good estimation of u. and T. The main advantage of this method is that it is applicable not only under near-neutral conditions but also under strong unstable conditions.

Original languageEnglish
Pages (from-to)619-625
Number of pages7
JournalAgronomie
Volume22
Issue number6
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • Aerodynamic parameters
  • Aerodynamic roughness length
  • Displacement height
  • Surface energy fluxes

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