Abstract
The influence of water vapor fluctuations on vertical turbulent fluxes is examined. It is shown that effects on density and, consequently, buoyancy are insignificant. However, because specific heat of air is a function of specific humidity, these fluctuations are found to influence sensible heat flux significantly. The critical parameter is the Bowen ratio, and a formulation relating the heat flux assuming dry air to the true value is given. The implications of this analysis to flux-gradient relationships in the surface layer are commented on.
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Antonia, R. A., Chambers, A. J., Rajagopalan, S., and Sreenivasan, K. R.: 1978, ‘Measurement of Turbulent Fluxes in Bass Straight’, J Phys. Oceanog. 8, 28–37.
Ball, F. K.: 1960, ‘Control of Inversion Height by Surface Heating’, Quart. J. Royal Meteorol. Soc. 86, 483–494.
Bean, B. R. and McGavin, R. E.: 1965, ‘The Use of the Radio Refractometer to Measure Water Vapor Turbulence’, Humidity and Moisture (Edited by A. Wexler), Reinhold Publishing Col., New York 561–568.
Busch, N. E.: 1973, ‘On the Mechanics of Atmospheric Turbulence’, Workshop on Micrometeorology (Edited by D. A. Haugen), American Meteorological Society, Boston, Mass., 1–65.
Champagne, F. H., Freiche, 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, 515–530.
Dyer, A. J.: 1967, ‘The Turbulent Transport of Heat and Water Vapor in an Unstable Atmosphere’, Quart. J. Royal Meteorol. Soc., 93, 501–508.
Fleagle, R. G. and Businger, J. A.: 1963, An Introduction to Atmospheric Physics, Academic Press, New York, 345 pp.
Hicks, B. B. and Dyer, A. J.: 1972, ‘The Spectral Density Technique for the Determination of Eddy Fluxes’, Quart. J. Royal Meteorol. Soc. 98, 838–844.
Khalsa, S. J. S. and Businger, J. A.: 1977, ‘The Drag Coefficient as Determined by the Dissipation Method and Its Relation to Intermittent Convection in the Surface Layer’, Boundary-Layer Meterorol. 12, 273–298.
Plate, E. J.: 1971, Aerodynamic Characteristics of Atmospheric Boundary Layers, U.S. Atomic Energy Commission, Oak Ridge, Tenn., 190 pp.
Priestley, C. H. B.: 1959, Turbulent Transfer in the Lower Atmosphere, The University of Chicago Press, 130pp.
Webb, E. K.: 1965, ‘Aerial Microclimate’, Meteorol. Monographs, 6, 27–58.
Webb, E. K., and Pearman, G. I.: 1977, ‘Correction of CO2 Transfer Measurements for the Effects of Water Vapour Transfer’, Second Australasian Conference on Heat and Mass Transfer, The University of Sidney, Feb. 1977, pp. 469–476.
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Brook, R.R. The influence of water vapor fluctuations on turbulent fluxes. Boundary-Layer Meteorol 15, 481–487 (1978). https://doi.org/10.1007/BF00120609
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DOI: https://doi.org/10.1007/BF00120609