Abstract
Mean wind velocity profiles were measured by means of radio-windsondes over the Landes region in southwestern France, which consists primarily of pine forests with scattered villages and clearings with various crops. Analysis of neutral profiles indicated the existence of a logarithmic layer between approximately z − d 0 = 67(±18)z 0 and 128(+-32)z 0 (z is the height above the ground, z 0 the surface roughness and d 0 the displacement height). The upper limit can also be given as z − d 0 = 0.33 (±0.18)h, where h is the height of the bottom of the inversion. The profiles showed that the surface roughness of this terrain is around 1.2 m and the displacement height 6.0 m. Shear stresses derived from the profiles were in good agreement with those obtained just above the forest canopy at a nearby location with the eddy correlation method by a team from the Institute of Hydrology (Wallingford, England).
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André, J.-C., Goutorbe, J.-P. and Perrier, A.: 1986, ‘HAPEX-MOBILHY: A Hydrologic Atmospheric Experiment, for the Study of Water Budget and Evaporation Flux at the Climate Scale’, Bull. Am. Meteorol. Soc. 67, 138–144.
André, J.-C., Goutorbe, J.-P., Perrier, A. et al.: 1988, ‘Evaporation Over Land-Surfaces; First Results From HAPEX-MOBILHY Special Observing Period’, Annales Geophysicae 6(5), 477–492.
Brutsaert, W.: 1982, Evaporation Into the Atmosphere, D. Reidel Publ. Co., Holland, 299 pp.
Brutsaert, W. and Kustas, W. P.: 1985, ‘Evaporation and Humidity Profiles for Neutral Conditions over Rugged Hilly Terrain’, J. Climate Appl. Met. 24, 915–923.
Brutsaert, W., Schmugge, T. J., Sellers, P. J., and Hall, F. G.: 1988, ‘Large-scale Experimental Technology with Remote Sensing in Land Surface Hydrology and Meteorology’, Eos (Trans. AGU) 6918, 561, 569–570.
Garratt, J. R.: 1978, ‘Flux Profile Relations Above Tall Vegetation’, Quart, J. Roy. Meteorol. Soc. 104, 199–211.
Garratt, J. R.: 1979, ‘Comments on the Paper “Analysis of the Flux-Profile Relationships Above Tall Vegetation — an Alternative View II”’, Quart. J. Roy. Meteorol. Soc. 105, 1079–1082.
Garratt, J. R.: 1980, ‘Surface Influence Upon Vertical Profiles in the Atmospheric Near-Surface Layer’, Quart. J. Roy. Meteorol. Soc. 106, 803–819.
Hicks, B. B., Hess, G. D., and Wesely, M. L.: 1979, ‘Analysis of Flux-Profile Relationships Above Tall Vegetation — An Alternative View’, Quart. J. Roy. Meteorol. Soc. 105, 1074–1077.
Jarvis, P. G., James, G. B., and Landsberg, J. J.: 1976, ‘Coniferous Forest, Chapter 7 in “Vegetation and the Atmosphere”’, J. L. Monteith (ed.), Vol. 2, Academic Press, London.
Kustas, W. P. and Brutsaert, W.: 1986, ‘Wind Profile Constants in a Neutral Atmospheric Boundary Layer over Complex Terrain’, Boundary-Layer Meteorol. 34, 35–54.
Paeschke, W.: 1937, ‘Experimentelle Untersuchungen zum Rauhigkeits- und Stabilitaetsproblem in der Bodennahen Luftschicht’, Beitr. z. Phys. d. Freien Atm. 24, 163–189.
Pasquill, F.: 1961, ‘The Estimation of the Dispersion of Windborne Material’, Meteorol. Mag. 90, 33–49.
Prandtl, L.: 1932, ‘Meteorologische Anwendungen der Stroemungslehre’, Beitr. Phys. Fr. Atm. 19, 188–202.
Raupach, M. R., Stewart, J. B., and Thom, A. S.: 1979, ‘Comments on the Paper “Analysis of Flux-Profile Relationships Above Tall Vegetation —- an Alternative View” I’, Quart. J. Roy. Meteorol. Soc. 105, 1077–1078.
Raupach, M. R., Thom, A. S., and Edwards, I.: 1980, ‘A Wind-Tunnel Study of Turbulent Flow Close to Regularly Arrayed Rough Surfaces’, Boundary-Layer Meteorol. 18, 373–397.
Shuttleworth, W. J., Gash, J. H. C., Lloyd, C. R., Moore, C. J., Roberts, J., Marques, A. de O., Fisch, G., Silva, V. de P., Ribeiro, M. N. G., Molion, L. C. B., de Sa, L. D. A., Nobre, J. C., Cabral, O. M. R., Patel, S. R., and Moraes, J. C.: 1984, ‘Eddy Correlation Measurements of Energy Partition for Amazonian Forest’, Quart. J. Roy. Meteorol. Soc. 110, 1143–1162.
Shuttleworth, W. J., Gash, J. H. C., Lloyd, C. R., Moore, C. J., and Wallace, J. S.: 1988, ‘An Integrated Micrometeorological System for Evaporation Me
Tennekes, H.: 1973, ‘The Logarithmic Wind Profile’, J. Atm. Sci. 30, 234–238.
Townsend, A. A.: 1976, The Structure of Turbulent Shear Flow, Sec. Ed., Cambridge University Press, 429 pp.
World Meteorological Organization: 1985, Report of the First Session of the JSC Scientific Steering Group on Land Surface Processes and Climate, (Geneva, 21–25 January, 1985), World Climate Program, WCP-96, 23 pp. + App.
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Parlange, M.B., Brutsaert, W. Regional roughness of the landes forest and surface shear stress under neutral conditions. Boundary-Layer Meteorol 48, 69–81 (1989). https://doi.org/10.1007/BF00121783
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DOI: https://doi.org/10.1007/BF00121783