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research article

On Monin-Obukhov similarity in the stable atmospheric boudary layer

Pahlow, M.
•
Parlange, M. B.  
•
Porte-Agel, F.  
2001
Boundary Layer Meteorology

Atmospheric measurements from several field experiments have been combined to develop a better understanding of the turbulence structure of the stable atmospheric boundary layer. Fast response wind velocity and temperature data have been recorded using 3-dimensional sonic anemometers, placed at several heights (≈ 1 m to 4.3 m) above the ground. The measurements were used to calculate the standard deviations of the three components of the wind velocity, temperature, turbulent kinetic energy (TKE) dissipation and temperature variance dissipation. These data were normalized and plotted according to Monin–Obukhov similarity theory. The non-dimensional turbulence statistics have been computed, in part, to investigate the general applicability of the concept of z-less stratification for stable conditions. From the analysis of a data set covering almost five orders of magnitude in the stability parameter ζ = z/L (from near-neutral to very stable atmospheric stability), it was found that this concept does not hold in general. It was only for the non-dimensional standard deviation of temperature and the average dissipation rate of turbulent kinetic energy that zless behaviour has been found. The other variables studied here (non-dimensional standard deviations of u, v, and w velocity components and dissipation of temperature variance) did not follow the concept of z-less stratification for the very stable atmospheric boundary layer. An imbalance between production and dissipation of TKE was found for the near-neutral limit approached from the stable regime, which matches with previous results for near-neutral stability approached from the unstable regime.

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Type
research article
DOI
10.1023/A:1018909000098
Author(s)
Pahlow, M.
Parlange, M. B.  
Porte-Agel, F.  
Date Issued

2001

Published in
Boundary Layer Meteorology
Volume

99

Issue

2

Start page

225

End page

248

Note

99: 225-248

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
EFLUM  
WIRE  
Available on Infoscience
September 8, 2005
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/216042
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