Results 251 to 260 of about 18,345 (296)

Performance of Bowen ratio systems on a slope

Agricultural and Forest Meteorology, 1992
Abstract The Bowen ratio energy balance technique was used to assess the energy fluxes on inclined surfaces in several recent surface-atmosphere interaction studies. Since air flow over a sloping surface may differ from that over a flat terrain, it is important to examine whether Bowen ratio measurements taken on sloping surfaces are valid.
D. Nie, I.D. Flitcroft, E.T. Kanemasu
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Bowen Ratio Estimates over Lake Erie

Journal of Great Lakes Research, 2004
Estimates of the ratio of sensible heat flux to latent heat flux (the Bowen ratio) are derived for Lake Erie based on the method introduced by Roll (1965), using hourly automated observations of lake and air temperatures for Buoy 45005 for the period 1992–1997 (May through November).
Robert V. Rohli, S.A. Hsu, Brent M. Lofgren, Michael R. Binkley   +3 more
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A Physical Bound on the Bowen Ratio

Journal of Climate and Applied Meteorology, 1987
Abstract Forbidding supersaturation above an evaporating water (or sublimating ice) surface fixes an upper bound on β, the Bowen ratio; a similar bound holds for evaporation from unsaturated surfaces. The bound arises from the nonlinearity of the temperature dependence of saturated water vapor density. The resulting inequalities are compared with other
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Precision of evaporation measurements using the Bowen ratio

Boundary-Layer Meteorology, 1976
Energy balance/Bowen ratio estimation of evapotranspiration is examined to determine the effects of different sources of error. General usage of the approximate psychrometric equation which neglects terms of order 1/p (p atmospheric pressure) can lead to large bias errors if the wet-bulb temperature depression is large.
K. J. A. Revfeim, R. B. Jordan
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The Story behind the Bowen Ratio

Bulletin of the American Meteorological Society, 1995
Ira Sprague Bowen (1898–1973) was a prominent astrophysicist during the twentieth century. In his impressive oeuvre of work over the 50-year span (1920–70), there appears a lone contribution to the geophysical sciences on the subject of evaporation and conduction from water surfaces.
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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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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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A Simple Psychrometric Apparatus for Bowen Ratio Determinations

Journal of Applied Meteorology, 1967
Abstract A simple apparatus has been devised which automatically reverses the vertical positions of two pairs of shielded and aspirated wet- and dry-bulb diodes. Analog voltage signals proportional to the dry and wet bulb temperatures T and Tw and to the differences ΔT and ΔTw are provided.
D. H. Sargeant, C. B. Tanner
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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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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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