Skip to main content
Log in

Analysis of turbulent transfers in vegetation: Use of thoron for measuring the diffusivity profiles

  • Published:
Boundary-Layer Meteorology Aims and scope Submit manuscript

    We’re sorry, something doesn't seem to be working properly.

    Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Abstract

Analysis of turbulent transfer inside a vegetative canopy can be realized by means of several methods. In our case, we have used principally the aerodynamic and the thoron methods. The thoron diffusivity profiles show an important distortion in the middle zone of the canopy, below the maximum of leaf area density. This distortion is associated with a maximum source of sensible heat flux at these levels, which partially invalidates the aerodynamic approach.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  • Blanc, D., Druilhet, A., Fontan, J., Guedalia, D., and Laurent, J. L.: 1968, ‘Mesure du flux du thoron sortant du sol et de la répartition verticale du radon et du thoron dans l'atmosphère, au niveau du sol’, Geofisica e Meteorologia 17, 99.

    Google Scholar 

  • Brown, K. W. and Covey, W.: 1966, ‘The Energy Budget Evaluation of the Micro-Meteorological Transfer Processes within a Corn Field’, J. Agric. Meteorol. 3, 73.

    Google Scholar 

  • Cionco, R. M.: 1965, ‘A Mathematical Model for Air Flow in a Vegetative Canopy’. J. Appl. Meteorol. 4, 517.

    Google Scholar 

  • Cowan, I. R.: 1968, ‘Mass, Heat and Momentum Exchange between Stands of Plants and Their Atmospheric Environment’, Quart. J. Roy. Meteorol. Soc. 94, 523.

    Google Scholar 

  • Djavanchir, A.: 1970, ‘Mise au point d'une chambre de transpiration pour mesurer la résistance stomatique’, Oecol. Plant. 5, 301.

    Google Scholar 

  • Druilhet, A.: 1966, Diffusion de la radioactivité naturelle de l'air dans les basses couches de l'atmosphère, Thèse de 3è cycle, Université de Toulouse.

  • Druilhet, A.: 1970, ‘Détermination de la diffusivité turbulente dans les premiers mètres au-dessus du sol à partir de la diffusion du thoron’, in: Techniques d' étude des facteurs physiques de la biosphère, I.N.R.A., 447.

  • Guedalia, D., Laurent, J. L., Fontan, J., Blanc, D., and Druilhet, A.: 1970, ‘Emanation of Radon (220) (Thoron) Form Soils’, J. Geophys. Res. 75, 357.

    Google Scholar 

  • Inoue, E.: 1963, ‘On the Turbulent Structure of Air Flow within Crop Canopies’, J. Meteorol. Soc. Japan 41, 317.

    Google Scholar 

  • Inoue, E., Uchijima, Z., Saito, T., Isobe, S., and Uemura, K.: 1969, ‘The “Assimitron” a Newly Devised Instrument for Measuring CO2 Flux in the Surface Air Layer’, J. Agric. Meteorol. 25, 19.

    Google Scholar 

  • Lemon, E.: 1960, ‘Photosynthesis under Field Conditions. II. An Aerodynamic Method for Determining the Turbulent Carbon Dioxide Exchange between the Atmosphere and a Corn Field’, Agron. J. 52, 697.

    Google Scholar 

  • Lemon, E. R.: 1964, The Energy Budget at the Earth's Surface, Part II, Production Research Report 2, Agricul. Res. Serv. U.S. Depart. of Agric. p. 49.

  • Lemon, E. R.: 1966, ‘Aerodynamic Studies of CO2 Exchange between the Atmosphere and the Plant’, International Minerals and Chemical Corporation, Symposium Photosynthesis, Chicago, Illinois, p.31.

  • Lemon, E. R.: 1970, ‘Mass and Energy Exchange between Plant Stands and Environment’, in: Prediction and Measurement of Photosynthetic Productivity, Wageningen, p. 199.

  • Luxmoore, R. J., Mellington, R. J., and Peters, D. B.: 1970, Row Crop Microclimate, Symposium on plant response to climatic factors, U.N.E.S.C.O., Uppsala, p. 22 (in press).

    Google Scholar 

  • Monteith, J. L.: 1962, ‘Measurement and Integration of Carbon Dioxide Fluxes in the Field’, Neth. J. Agric. Sci. 10, 334.

    Google Scholar 

  • Perrier, A.: 1967, ‘Approche théorique de la microturbulence et des transferts dans les couverts végétaux en vue de l'analyse de la production végétale’, Météorologie 4, 517.

    Google Scholar 

  • Philips, J. R.: 1964, ‘Sources and Transfer Processes in the Air Occupied by Vegetation’, J. Appl. Meteorol. 3, 390.

    Google Scholar 

  • Schlichting, H.: 1955, Boundary Layer Theory, McGraw-Hill, New York and London, p. 535.

    Google Scholar 

  • Tanner, C. B.: 1963, ‘Energy Relations in Plant Communities’, in: Environmental control of plant growth, Academic Press, New York and London, p. 141.

  • Uchijima, Z.: 1962, ‘Studies on the Microclimate within the Plant Communities (1). On the Turbulent Transfer Coefficient within Plant Layer’, J. Agric. Meteorol. 18, 1.

    Google Scholar 

  • Uchijima, Z., and Wright, J. L.: 1964, ‘An Experimental Study of Air Flow in a Corn Plant-Air Layer’, Bull. Nat. Inst. Agric. Sci. A-11, 19.

    Google Scholar 

  • Uchijima, Z., Udagawa, T., Horie, T., and Kobayashi, K.: 1967, ‘Studies of Energy and Gas Exchange within Crop Canopies (1). CO2 Environment in a Corn Plant Canopy’, J. Agric. Meteor. 23, 99.

    Google Scholar 

  • Wright, J. L. and Lemon, E. R.: 1966a, ‘Photosynthesis under Field Conditions. VIII: Analysis of Windspeed Fluctuation Data to Evaluate Turbulent Exchange Within a Corn Crop’, Agronomy J. 58, 265.

    Google Scholar 

  • Wright, J. L. and Lemon, E. R.: 1966b, ‘Photosynthesis under Field Conditions. IX: Vertical Distribution of Photosynthesis Within a Corn Crop’, Agronomy J. 58, 265.

    Google Scholar 

Download references

Authors

Additional information

Centre de Physique Atomique et Nucléaire, Université Paul Sabatier, Toulouse, France.

Bioclimatologie, Institut National de la Recherche Agronomique, Route de St. Cyr, Versailles, France.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Druilhet, A., Perrier, A., Fontan, J. et al. Analysis of turbulent transfers in vegetation: Use of thoron for measuring the diffusivity profiles. Boundary-Layer Meteorol 2, 173–187 (1971). https://doi.org/10.1007/BF00192128

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00192128

Keywords

Navigation