Boundary-Layer Meteorology

, Volume 76, Issue 1–2, pp 25–40 | Cite as

The scintillation method tested over a dry vineyard area

  • H. A. R. De Bruin
  • B. J. J. M. Van Den Hurk
  • W. Kohsiek


Measurements of a scintillometer device mounted at 4 m above a dry vineyard area in La Mancha, Spain, are used to obtain an average sensible heat flux densityH. Averaging is over a rectangular area determined by the distance between the scintillometer light source and receptor (875 m) and some upwind distance governed by the horizontal wind speed perpendicular to that line. Using similarity relations obtained from La Crau, a good correspondence betweenH measured with the scintillometer and an eddy-correlation device in the centre of a vineyard is obtained. The friction velocityu* was either measured directly using a sonic anemometer or obtained indirectly from two wind speeds and known values of the roughness length zo and displacementd. The free convection formulation underestimates the sensible heat flux by about 30%. This is due to a significant contribution of mechanically generated turbulence to the total turbulent transport, which was caused by relatively strong winds and rough terrain.


Convection Heat Flux Wind Speed Strong Wind Free Convection 
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  1. Bolle, H. J., Andre, J. C., Arrue, J. L., Barth, H. K, Bessemoulin, P., Brasa, A., de Bruin, H. A. R., Cruces, J., Dugdale, G., Engman, E. T., Evans, D. L., Fantechi, R., Fiedler, F., van der Griend, A., Imeson, A. C., Jochum, A., Kabat, P., Kratzsch, T., Lagouarde, J.-P., Langer, I., Llamas, R., Lopez-Baeza, E., Melia Miralles, J., Muniosguren, L. S., Nerry, F., Noilhan, J., Oliver, H. R., Roth, R., Saatchi, S. S., Sanchez Diaz, J., de Santa Olalla, M., Shuttleworth, W. J., Sogaard, H., Stricker, H., Thomes, J., Vauclin, M., and Wickland, D.: 1993, ‘EFEDA: European Field Experiment in a Desertification Threatened Area’,Ann. Geophysicae 11, 173–189.Google Scholar
  2. Champagne, F. H., Friehe, C. A., LaRue, J. C., and Wyngaard, J. C.: 1977, ‘Flux Measurements, Flux Estimation Techniques, and Fine-Scale Turbulence Measurements in the Unstable Surface Layer over Land’,J. Atmos. Sci. 34, 515–530Google Scholar
  3. Chintawongvanich, P. and Olsen, R. O.: 1991, ‘Remote Sensing of Atmospheric Turbulence’,Second Symposium on Lower Tropospheric Profiling. Needs and Technologies. September 10–13, 1991, Boulder, Colorado U.S.A.Google Scholar
  4. De Bruin, H. A. R., Kohsiek, W., and van den Hurk, B. J. J. M.: ‘A Verification of Some Methods to Determine the Fluxes of Momentum, Sensible Heat and Water Vapourusing Standard Deviation and Structure Parameter of Scalar Meteorological Quantities’,Boundary-Layer Meteorol. 63, 231–257.Google Scholar
  5. De Bruin, H. A. R. (co-Ed.): 1993, ‘Surface Fluxes Measured during EFEDA’, in: Bolle, H.-J. and Streckenbach, B. (eds.),The ECHIVAL Field Experiment in a Desertification-Threatened Area (EFEDA), Final Report, Berlin, August 1993, pp. 142–188.Google Scholar
  6. De Bruin, H. A. R.: 1994, ‘Analytic Solutions of the Equations Governing the Temperature Fluctuation Method’,Boundary-Layer Meteorol. 68, 427–432.Google Scholar
  7. Green, A. E., McAneney, K. J., and Astill, M. S.: 1994, ‘Surface-Layer Scintillation Measurements of Daytime Sensible Heat Flux and Momentum Fluxes’,Boundary-Layer Meteorol 68, 357–373.Google Scholar
  8. Hill, R. J.: 1992, ‘Review of Optical Scintillation Methods of Measuring the Refraction-Index Spectrum, Inner Scale and Surface Fluxes’,Waves in Random Media 2, 179–201.Google Scholar
  9. Hill, R. J., Ochs, G. R., and Wilson, J. J.: 1992, ‘Measuring Surface-Layer Fluxes of Heat and Momentum Using Optical Scintillation’,Boundary-Layer Meteorol 58, 391–408.Google Scholar
  10. Kohsiek, W.: 1982, ‘MeasuringC T2,C Q2 andC TQ in the Unstable Surface Layer, and Relations to the Vertical Fluxes of Heat and Moisture’,Boundary-Layer Meteorol 24, 89–107.Google Scholar
  11. Kohsiek, W.: 1987,A 15 cm Aperture LED Scintillometer for C 2n and Crosswind Measurements, KNMI, Scientific Report WR 87-3.Google Scholar
  12. McMillen, R. T.: 1988, ‘An Eddy-Correlation Technique with Extended Applicability to Non-Simple Terrain’,Boundary-Layer Meteorol.43, 231–245.Google Scholar
  13. Monna, W. A. A., Kohsiek, W., Prangsma, G. J., Roozekrans, J. N. and van der Vliet, J. G.: 1994, ‘EFEDA-91 Documentation of Measurements Obtained by KNMI’, KNMI Technical report TR-171, 13 pp.Google Scholar
  14. Moore, C. J.: 1986, ‘Frequency Response Corrections for Eddy Correlation Systems’,Boundary-Layer Meteorol.37, 17–35.Google Scholar
  15. Panofsy, H. A. and Dutton, J. A.: 1984,Atmospheric Turbulence and Methods for Engineering Applications, John Wiley & Sons, New York.Google Scholar
  16. Thiermann, V.: 1992, ‘A Displaced-Beam Scinitillometer for Line-Averaged Measurements of Surface Layer Turbulence’,Tenth Symposium on Turbulence and Diffusion, American Meteorol. Soc., Portland, Oregon, September 29-October 2, 1992.Google Scholar
  17. Thiermann, V. and Grassl, H.: 1992, ‘The Measurement of Turbulent Surface Layer Fluxes by Use of Bichromatic Scintillation’,Boundary-Layer Meteorol.58, 367–389.Google Scholar
  18. Van Asselt, C. J., Jacobs, A. F. G., van Boxel, J. H. and Jansen, A. E.: 1991, ‘A Rigid Fast-Response Thermometer for Atmospheric Research’,Meas. Sci. Technol. 2, 26–31.Google Scholar
  19. Wyngaard, J. C., Izumi, Y., and Collins Jr., S. A.: 1971, ‘Behavior of the Refractive-Index-Structure Paramater Near the Ground’,J. Opt. Soc. Am.,61, 1646–1650.Google Scholar
  20. Wesely, M. L.: 1976, ‘A Comparison of Two Optical Methods for Measuring Line Averages of Thermal Exchanges above Warm Surfaces’,J. Appl. Meteorol. 15, 1177–1188.Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • H. A. R. De Bruin
    • 1
  • B. J. J. M. Van Den Hurk
    • 1
  • W. Kohsiek
    • 2
  1. 1.Department of MeteorologyWageningen Agricultural UniversityWageningenThe Netherlands
  2. 2.Royal Netherlands Meteorological InstituteDe Biltthe Netherlands

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