Boundary-Layer Meteorology

, Volume 21, Issue 4, pp 465–475 | Cite as

Spatial coherence of temperature fluctuations in the atmospheric surface layer

  • D. Phong-Anant
  • A. J. Chambers
  • R. A. Antonia
Article

Abstract

Simultaneous temperature fluctuations have been measured along directions both parallel and orthogonal to the wind direction in the atmospheric surface layer. Ensemble-averaged temperature distributions associated with the ramp-like feature observed in instantaneous temperature traces indicate that the average duration of the ramp is approximately independent of height. Application of Davenport's geometric similarity of coherence of temperature fluctuations yields approximate estimates for the spatial extent of the structure characterized by the ramp. The longitudinal extent is approximately 12 times the vertical extent and 17 times the lateral extent.

Keywords

Surface Layer Coherence Temperature Distribution Wind Direction Average Duration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Antonia, R. A., Chambers, A. J., Friehe, C. A., and Van Atta, C. W.: 1979, ‘Temperature Ramps in the Atmospheric Surface Layer’,J. Atmos. Sci. 36, 99–108.Google Scholar
  2. Baldwin, L. V. and Johnson, G. R.: 1973, ‘An Estimate of Space-Time Correlations’,Boundary-Layer Meteorol. 5, 373–377.Google Scholar
  3. Berman, S. and Stearns, C. R.: 1977, ‘Near-Earth Turbulence and Coherence Measurements at Aberdeen Proving Ground, Md’,Boundary-Layer Meteorol. 11, 485–506.Google Scholar
  4. Davenport, A. G.: 1961, ‘The Spectrum of Horizontal Gustiness Near the Ground in High Winds’,Quart. J. R. Meteorol. Soc. 87, 194–211.Google Scholar
  5. Davison, D. S.: 1976, ‘Geometric Similarity for the Temperature Field in the Unstable Atmospheric Surface Layer’,Boundary-Layer Meteorol. 10, 167–180.Google Scholar
  6. Panofsky, H. A.: 1962, ‘Scale Analysis of Atmospheric Turbulence at 2 m’,Quart. J. R. Meteorol. Soc. 88, 57–69.Google Scholar
  7. Panofsky, H. A. and Singer, I. A.: 1965, ‘Vertical Structure of Turbulence’,Quart. J. R. Meteorol. Soc. 91, 339–344.Google Scholar
  8. Phong-anant, D., Antonia, R. A., Chambers, A. J., and Rajagopalan, S.: 1980, ‘Features of the Large Scale Motion in the Atmospheric Surface Layer’,J. Geophys. Res. 85, 424–432.Google Scholar
  9. Pielke, R. A. and Panofsky, H. A.: 1970, ‘Turbulence Characteristics Along Several Towers’,Boundary-Layer Meteorol. 1, 115–130.Google Scholar
  10. Ropelowski, C. F., Tennekes, H., and Panofsky, H. A.: 1973, ‘Horizontal Coherence of Wind Fluctuations’,Boundary-Layer Meteorol. 5, 353–363.Google Scholar
  11. Shiotani, M.: 1969, ‘Structure of Gusts in High Winds, Part 3’, Interim Report, The Physical Laboratory, Nikon University of Marashino, Japan.Google Scholar
  12. Shiotani, M. and Iwatani, Y.: 1976, ‘Horizontal Space Correlations of Velocity Fluctuations During Strong Winds’,J. Meteorol. Soc. Japan 54, 59.Google Scholar
  13. Taylor, R. J.: 1958, ‘Thermal Structures in the Loewest Layers of the Atmosphere’,Aust. J. Phys. 11, 168–176.Google Scholar
  14. Webb, E. K.: 1977, ‘Convection Mechanisms of Atmospheric Heat Transfer from Surface to Global Scales’,Proc. Second Australasian Conference on Heat and Mass Transfer, University of Sydney, 523–539.Google Scholar

Copyright information

© D. Reidel Publishing Co. 1981

Authors and Affiliations

  • D. Phong-Anant
    • 1
  • A. J. Chambers
    • 1
  • R. A. Antonia
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of NewcastleNewcastleAustralia

Personalised recommendations