Results 221 to 230 of about 16,251 (260)

On estimating evaporation with fluctuating Bowen ratio

Journal of Geophysical Research, 1960
The correction for the effect of fluctuating Bowen ratio on heat-budget estimates of evaporation is derived. In an investigation during late summer and autumn at Lake Eucumbene (southeast Australia), the correction amounted to about 5 per cent.
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A parameterization of Bowen ratio with respect to soil moisture availability

Advances in Atmospheric Sciences, 1995
The Bowen ratio (B) is impacted by 5 environmental elements: soil moisture availabillity,m, the ratio of resistances between atmosphere and soil pores,r a/rD, atmospheric relative humidity,h, atmospheric stability, δT, and environment temperature.
Ye Zhuojia, Roger A. Pielke
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Estimates of Bowen's ratio by the heat budget measurements of a cornfield

Journal of Geophysical Research, 1960
Estimates of Bowen's ratio, which is the ratio of the amount of heat transferred as sensible heat to that transferred as latent heat from a surface, were made from a 10-acre cornfield during the summer of 1959. These estimates were based on a heat budget technique which partitioned the energy used in evaporative processes, sensible heat transfer to the
J. F. Gerber, W. L. Decker
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Further note on evaporation with fluctuating bowen ratio

Journal of Geophysical Research, 1964
In an earlier note [Webb, 1960a] a correction for the effect of fluctuating Bowen ratio on heat-budget estimates of evaporation from a land or water surface was derived, making use of subsidiary measurement of wind. The correction was found to be about 5 per cent during a summer-autumn investigation at Lake Eucumbene, southeast Australia [Webb, 1960b].
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Psychrometric apparatus for Bowen-ratio determination over forests

Boundary-Layer Meteorology, 1971
The psychrometric apparatus design for Bowen ratio determination reported previously by Sargeant and Tanner was modified and a new apparatus built. Modification of the intake design improved the symmetry and rigidity of the sensor mounting. Wet- and dry-bulb differences were measured with an error less than 0.01 °C over a vertical distance of 1 m ...
T. A. Black, K. G. McNaughton
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Error analysis of bowen ratios measured by differential psychrometry

Agricultural Meteorology, 1970
Abstract The error analysis of evaporation measurements by the energy balance/Bowen ratio method, based on differential psychrometry, indicates that the contribution of wet and dry-bulb temperature measurement errors is directly proportional to the Bowen ratio.
M. Fuchs, C.B. Tanner
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A New Formulation for the Bowen Ratio over Saturated Surfaces

Journal of Applied Meteorology, 1996
Abstract Analytical expressions are presented for calculating the Bowen ratio, Bo = Hs/HL, from a quantity Bo* that is derived primarily from the surface temperature Ts and the assumption that the near-surface air is saturated (but not supersaturated) with water vapor.
Edgar L. Andreas, Beniamin A. Cash
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Influence of Bowen Ratio on Boundary-Layer Cloud Structure

Journal of the Atmospheric Sciences, 1996
Abstract An investigation of the influence of the ratio of surface sensible heat flux to latent heat flux, the Bowen ratio. on the structure of boundary-layer clouds is carried out utilizing numerical large eddy simulations (LES). The role of cloud-top radiational cooling, cloud-top temperature and moisture jump conditions, and wind shear are included ...
D. C. Lewellen, W. S. Lewellen, S. Yoh
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Daytime evaporation and the self-preservation of the evaporative fraction and the Bowen ratio

Journal of Hydrology, 1996
Abstract Under certain conditions several ratios of fluxes in the surface energy budget are known to remain relatively constant during the daytime hours. This ‘self-preservation’ has allowed the use of midday values of the evaporative fraction, EF, multiplied by the daytime total of net radiation minus the ground heat flux, to provide a good estimate
Richard Crago, Wilfried Brutsaert
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Spatial Averaging Bowen Ratio System: Description and Lysimeter Comparison

Transactions of the ASAE, 1992
Bowen ratio energy balance (BREB) measurements near a spatially divergent surface may not correctly partition energy fluxes when simply sampling over time. Thus, a Bowen ratio system was designed and constructed to perform spatial sampling and then evaluated by comparison to a precision weighing lysimeter at Bushland, Texas.
null W. C. Bausch, null T. M. Bernard
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