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A spatial length scale analysis of turbulent temperature and velocity fluctuations within and above an orchard canopy

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Abstract

Turbulent flow within and above an almond orchard was measured with three-dimensional wind sensors and fine-wire thermocouple sensors arranged in a horizontal array. The data showed organized turbulent structures as indicated by coherent asymmetric ramp patterns in the time series traces across the sensor array. Space-time correlation analysis indicated that velocity and temperature fluctuations were significantly correlated over a transverse distance more than 4m. Integral length scales of velocity and temperature fluctuations were substantially greater in unstable conditions than those in stable conditions. The coherence spectral analysis indicated that Davenport's geometric similarity hypothesis was satisfied in the lower frequency region. From the geometric similarity hypothesis, the spatial extents of large ramp structures were also estimated with the coherence functions.

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References

  • Amiro, B. D.: 1990, ‘Comparison of Turbulence Statistics within Three Boreal Forest Canopies’, Boundary-Layer Meteorol. 51, 99–121.

    Google Scholar 

  • 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 

  • Aylor, D. E.: 1989, ‘Aerial Spore Dispersal Close to a Focus of Disease’, Agri. Forest Meteorol. 47, 109–122.

    Google Scholar 

  • Baldocchi, D. D. and Meyers, T. P.: 1988, ‘Turbulence Structure in a Deciduous Forest’, Boundary-Layer Meteorol. 43, 345–364.

    Google Scholar 

  • Baldocchi, D. D. and Huchison, B. A.: 1988, ‘Turbulence in an Almond Orchard: Spatial Variation in Spectra and Coherence’, Boundary-Layer Meteorol. 42, 239–311.

    Google Scholar 

  • Chen, C. P. and Blackwelder, R. F.: 1978, ‘Large-scale Motion in a Turbulent Boundary Layer: a Study Using Temperature Contamination’, J. Fluid Mech. 89, 1–31.

    Google Scholar 

  • Cionco, R. M.: 1989a, ‘Micrometeorological Measurements of Canopy Domains During Project WIND’, 19th Confer. Agri. Forest Meteorol., pp. 165–168. AMS, Boston.

    Google Scholar 

  • Cionco, R. M.: 1989b, ‘Orchard Winds Coupled to Surface Layer Windfields’, 19th Confer. Agri. Forest Meteorol., pp. 173–175. AMS, Boston.

    Google Scholar 

  • 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 

  • Denmead, O. T. and Bradley, E. F.: ‘Flux-Gradient Relationship in a Forest Canopy’, in B. A. Huchison and B. B. Hicks (eds.), The Forest and Atmosphere Interactions, pp. 421–442, Reidel Publishing Co.

  • Durbin, P. A.: 1983, ‘Stochastic Differential Equations and Turbulent Dispersion’, NASA Reference, Publication 1103.

  • Finnigan, J. J.: 1979, ‘Turbulence in Waving Wheat. II. Structure of Momentum Transfer’, Boundary-Layer Meteorol. 16, 213–236.

    Google Scholar 

  • Gao, W., Shaw, R. H., and Paw U, K. T.: 1989, ‘Observation of Organized Structure in Turbulent Flow Within and Above a Forest Canopy’, Boundary-Layer Meteorol. 47, 349–377.

    Google Scholar 

  • Grant, R. H., Bertolin, G. E., and Herington, L. P.: 1986, ‘The Intermittent Vertical Heat Flux over a Spruce Forest Canopy’, Boundary-Layer Meteorol. 35, 317–330.

    Google Scholar 

  • Huchison, B. A. and Cionco, R. M.: 1989, ‘Canopy Structure and Leaf Area Measurements for Project WIND Field Studies’, 19th Confer. Agri. Forest Meteorol., pp. 247–250.

  • Jenkens, G. M. and Watts, D. G.: 1968, Spectral Analysis and Its Applications, Holden-day, Oakland, California, pp.187–188.

    Google Scholar 

  • Kaimal, J. C. and Businger, J. A.: 1970, ‘Case Studies of a Convective Plume and a Dust Devil’, J. Appl. Meteorol. 9, 612–620.

    Google Scholar 

  • Kristensen, L. and Jensen, N. O.: 1979, ‘Lateral Coherence in Isotropie Turbulence and in Natural Wind’, Boundary-Layer Meteorol. 17, 353–373.

    Google Scholar 

  • Kristensen, L., Panofsky, H. A., and Smith, S. D.: 1981, ‘Lateral Coherence of Longitudinal Wind Components in Strong Winds’, Boundary-Layer Meteorol. 21, 199–205.

    Google Scholar 

  • Leclerc, M. Y., Thurtell, G. W., and Kidd, G. E.: 1988, ‘Measurements and Langevin Simulations of Mean Tracer Concentration Fields Downwind from a Circular Source Inside an Alfalfa Canopy’, Boundary-Layer Meteorol. 43, 287–308.

    Google Scholar 

  • Li, Z. J., Miller, D. R., and Lin, J. D.:, 1985, ‘A First-Order Closure Scheme to Describe Counter Gradient Momentum Transport in Plant Canopies’, Boundary-Layer Meteorol. 33, 77–83.

    Google Scholar 

  • Li, Z. J., Lin, J. D., and Miller, D. R.: 1990, ‘Air Flow over and Through a Forest Edge: A Steady-State Numerical Simulation’, Boundary-Layer Meteorol. 51, 179–197.

    Google Scholar 

  • Lin, J. D. and Miller, D. R.: 1985, ‘A Preliminary Field Study of Turbulent Flow over and inside a Forest Edge’, Interim Technical Report USARO. pp. 30–33.

  • Meyers, T. P. and Paw U, K. T.: 1986, ‘Testing of a Higher-order Closure Model for Modeling Airflow within and above Plane Canopies’, Boundary-Layer Meteorol. 31, 296–310.

    Google Scholar 

  • Miller, D. R., Lin, J. D., Wang, Y. S., and Thistle, H. W.: 1989, ‘A Triple Hot-film and Wind Octant Combination Probe for Turbulent Air Flow Measurement in and Near Plant Canopies’, Agri. Forest Meteorol. 44, 353–368.

    Google Scholar 

  • Miller, D. R., Lin, J. D., and Lu, Z. N.: 1991, ‘Air Flow across an Alpine Forest Clearing, A Model and Field Measurements’, Agri. Forest Meteorol. (in press).

  • Panofsky, H. A.: 1962, ‘Scale Analysis of Atmospheric Turbulence at 2 m’, Quart. J. R. Meteorol. Soc. 88, 57–69.

    Google Scholar 

  • Panofsky, H. A., and Mizuno, T.: 1975, ‘Horizontal Coherence and Pasquill's Beta’, Boundary-Layer Meteorol. 9, 247–256.

    Google Scholar 

  • Panofsky, H. A., and Dutton, J. A.: 1984, Atmospheric Turbulence, John-Wiley, New York.

    Google Scholar 

  • Phong-Anant, D., Chambers, A. J., and Antonia, R. A.: 1981, ‘Spatial Coherence of Temperature Fluctuations in the Atmospheric Surface Layer’, Boundary-Layer Meteorol. 21, 465–475.

    Google Scholar 

  • Raupach, M. R.: 1981, ‘Conditional Statistics of Reynolds Stress in Rough-wall and Smooth-wall Turbulent Boundary Layers’, J. Fluid Mech. 108, 363–382.

    Google Scholar 

  • Raupach, M. R. and Thom, A. S.: 1981, ‘Turbulence in and above Plant Canopies’, Ann. Rev. Fluid Mech. 73, 97–129.

    Google Scholar 

  • Raupach, M. R., Coppin, P. A., and Legg, B. J.: 1986, ‘Experiments on Scalar Dispersion within a Model Plant Canopy. Part I The Turbulence Structure’, Boundary-Layer Meteorol. 35, 21–52.

    Google Scholar 

  • Raupach, M. R.: 1987, ‘A Lagrangian Analysis of Scalar Transfer in Vegetation Canopies’, Q. J. Roy. Meteorol. Soc. 113, 107–120.

    Google Scholar 

  • Raupach, M. R.: 1989, ‘A Practical Lagrangian Method for Relating Scalar Concentrations to Source Distributions in Vegetation Canopies’, Q. J. R. Meteorol. Soc. 115, 609–632.

    Google Scholar 

  • Ropelowski, C. F., Tennekes, H., and Panofsky, H. A.: 1973, ‘Horizontal Coherence of Wind Fluctuations’, Boundary-Layer Meteorol. 5, 353–363.

    Google Scholar 

  • Schols, J. L. J.: 1984, ‘The Detection and Measurement of Turbulent Structures in the Atmospheric Surface Layer’, Boundary-Layer Meteorol. 29, 39–58.

    Google Scholar 

  • Shaw, R. H.: 1985, ‘On Diffusive and Dispersive Fluxes in Forest Canopies’, B. A. Huchison and B. B. Hicks (eds.), The Forest and Atmosphere Interaction, pp. 407–419, Reidel Publishing Co.

  • Shaw, R. H., Paw U, K. T., and Gao, W.: 1989, ‘Detection of Temperature Ramps and Flow Structures at a Deciduous Forest Site’, Agri. Forest Meteorol. 47, 123–138.

    Google Scholar 

  • Shiotani, M. and Iwatani, Y.: 1976, ‘Horizontal Space Correlations of Velocity Fluctuations During Strong Winds’, J. Meteorol. Soc. Japan 54, 59–66.

    Google Scholar 

  • Thomson, D. J.: 1987, ‘Criteria for the Selection of Stochastic Models of Particle Trajectories in Turbulent Flows’, J. Fluid Mech. 180, 529–556.

    Google Scholar 

  • Wallace, J. M., Eckelmann, H., and Brodkey, R. S.: 1972, ‘The Wall Region in Turbulent Shear Flow’, J. Fluid Mech. 54, 39–48.

    Google Scholar 

  • Wang, Y. S.: 1989, ‘Turbulence Structure of Momentum and Heat Transport in the Edge of a Deciduous Forest Stand’, Ph.D Thesis, University of Connecticut, pp. 72–92.

  • Wilczak, J. M.: 1984, ‘Large-scale Eddies in the Unstably Stratified Atmospheric Surface Layer. Part I: Velocity and Temperature Structure’, J. Atmos. Sci. 41, 3537–3550.

    Google Scholar 

  • Wilson, J. D., Thurtell, G. W., and Kidd, G. E.: 1981, ‘Numerical Simulation of Particle Trajectories in Inhomogeneous Turbulence. I: System with Constant Turbulent Velocity Scales’, Boundary-Layer Meteorol. 21, 295–313.

    Google Scholar 

  • Wilson, J. D.: 1988, ‘A Second-order Closure Model for Flow Through Vegetation’, Boundary-Layer Meteorol. 42, 371–392.

    Google Scholar 

  • Wilson, J. D., Legg, B. J., and Thomson, D. J.: 1983, ‘Correct Calculation of Particle Trajectories in the Presence of a Gradient in Turbulent Velocity Variance’, Boundary-Layer Meteorol. 27, 163–169.

    Google Scholar 

  • Wilson, N. R. and Shaw, R. H.: 1977, ‘Higher Order Closure Model for Canopy Flow’, J. Appl. Meteorol. 16, 1197–1205.

    Google Scholar 

  • Yamada, T.: 1982, ‘A Numerical Model Study of Turbulent Airflow in and above a Forest Canopy’, J. Meteorol. Soc. Japan. 60, 439–454.

    Google Scholar 

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Authors and Affiliations

  1. Department of Natural Resources Management and Engineering, University of Connecticut, 06269-4087, Storrs, CT, USA

    Y. S. Wang, D. R. Miller & D. E. Anderson

  2. U.S. Army Atmospheric Science Laboratory, 88002, White Sands Missile Range, NM, USA

    R. M. Cionco

  3. Department of Civil Engineering, University of Connecticut, 06269-4037, Storrs, CT, USA

    J. D. Lin

Authors
  1. Y. S. Wang
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  2. D. R. Miller
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  3. D. E. Anderson
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  4. R. M. Cionco
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  5. J. D. Lin
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Wang, Y.S., Miller, D.R., Anderson, D.E. et al. A spatial length scale analysis of turbulent temperature and velocity fluctuations within and above an orchard canopy. Boundary-Layer Meteorol 59, 125–139 (1992). https://doi.org/10.1007/BF00120690

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  • DOI: https://doi.org/10.1007/BF00120690

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