Abstract
A Penman-Monteith equation has been used to evaluate a change in canopy resistance on the evapotranspiration of a savannah and agricultural area in Botswana. After a short introduction, some problems concerning the K-theory or ‘first order closure’ are indicated when one uses it for transport modelling within and above a canopy. The Penman-Monteith equation was used to calculate the canopy resistance for a savannah vegetation and sorghum under the same environmental conditions. After that, by changing the stomatal resistance due to an increase of the CO2 content, the change in the evapotranspiration was estimated.
Finally some recommendations for future research are given and an outline of a proposed FACE experiment is presented.
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References
Allen, L. H. 1979. Four potentials for carbon dioxide enrichment. In: Barfield, B. J. & Gerber, J. F. (eds), Modification of the areal environment of crops (Monograph No. 2), Am. Soc. of Agr. Eng., St. Joseph, Missouri, pp. 500–519.
Bink, N. J. & Kroon, L. J. M. 1990. The behaviour of the transfer efficiencies of sensible heat and water vapour under conditions of local advection. Nineth Symposium on turbulence and diffusion, April 30–May 3, 1990, Roskilde, Denmark, pp. 232–234.
Businger, J. A., Wijngaard, J. C., Izumi, Y. & Bradly, E. F. 1971. Flux profile relationships in the atmospheric surface layer. J. Atm. Sci. 28: 181–189.
Denmead, O. T. & Bradley, E. F. 1985. Flux-gradient relationships in a forest canopy. In: Hutchison, B. A. & Hicks, B. B. (eds), The forest-atmosphere interaction, D. Reidel Publishing Company, pp. 421–442.
Drake, B. G., Curtis, P. S., Arp, W. J., Leadly, P. W., Johnson, J. & Whigham, D. 1987. Effect of elevated CO2 on Chesapeake Bay Wetlands. III. Ecosystems and whole plant responses in the first year of exposure, U.S. DOE Washington pp. 101.
Goudriaan, J. 1989. Simulation of micrometeorology of crops, some methods and their problems, and a few results. Agric. For. Meteorol. 47: 239–258.
Enoch, H. Z. & Kimbell, B. A. 1986. Carbon dioxide enrichment of greenhouse crops., 11, Physiology, yield and economics CRC. Boca Raton, p. 23.
Lang, A. R. G., McNaughton, K. G., Fazu, C., Bradley, E. F. & Othaki, E. 1983. Inequality of eddy transfer coefficients for vertical transports of sensible heat and latent heat under advective inversions. Bound. L. Met. 25: 25–41.
Martin. Ph, Rosenberg, N. J. & Mckenney, M. S. 1989. Sensitivity of evapotranspiration in a wheat field, a forest, and a grassland to changes in climate and direct effects of carbon dioxide. Bound. L. Met.: 117–151.
McLsod, A. R. & Facrell, J. E. 1983. A prototype system for openair fumigation of agricultural crops. 1: theoretical design (TPRD/L/2474?N83). U.K. Central Electricity Research Laboratories.
Monteith, J. L. 1965. Evaporation and Environment. Symposium of the Society for Experimental Biology 19: 205–234.
Rozema, J., Lenssen, G. M. & Broekman, R. A. 1990. Effects of atmospheric carbon dioxide enrichment in salt marsh plants. In: Beukema, J. J., Wolf, W. J., Brouns, J. J. W. M. (eds). Expected effects of climatic change on marine coastal ceosystems. Kluwer, Dordrecht, pp. 49–54.
Van Boxel, J. H. 1986. Heat balance investigations in tidal areas. Ph. D. Thesis, Free University, Amsterdam.
Van der, Griend, A. A., Owe, M., Vugts, H. F. & Prince, S. D. 1989. Water and surface energy modeling in Botswana. Bull. Am. Met. Soc. 70: 1404–1411.
Webb, E. K., Pearman, G. I. & Leuning, R. 1980. Correction of flux measurements for density effects due to heat and water vapor transfer. Quat. J. Roy. Meteor. Soc. 106: 85–100.
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Vugts, H.F. The need for micrometeorological research of the response of the energy balance of vegetated surfaces to CO2 enrichment. Vegetatio 104, 321–328 (1993). https://doi.org/10.1007/BF00048162
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DOI: https://doi.org/10.1007/BF00048162