Results 211 to 220 of about 15,382 (260)

Assessment of reliability of Bowen ratio method for partitioning fluxes

Agricultural and Forest Meteorology, 1999
The errors associated with the Bowen ratio-energy balance (BREB) method are analysed, to determine analytically the reliable values of the Bowen ratio (β) and of the latent and sensible heat fluxes. It is shown that, if advection is considered negligible, the BREB method is able to determine correctly the surface flux partitioning or the flux values ...
Francesc Castellvi, Manuel Ibanez
exaly   +2 more sources

Comparison of bowen ratio and aerodynamic estimates of evapotranspiration

Agricultural and Forest Meteorology, 1990
Abstract The energy balance of an irrigated cotton field was determined using the Bowen ratio to partition between sensible and latent heat flux density. These data verified estimates of the sensible heat flux density derived from either profiles of wind and temperature at six levels, or from a simplified aerodynamic method using wind and temperature
Pieri, Philippe, Fuchs, Marc
openaire   +2 more sources

Evapotranspiration - How Good is the Bowen Ratio Method?

Agricultural Water Management, 1984
Abstract Under moist conditions, the energy balance approach to determining evapotranspiration from plant communities can give good results, but the method may not be nearly so accurate under very dry conditions, or with considerable advection of energy in moist conditions.
D.E. Angus, P.J. Watts
openaire   +1 more source

On the Bowen Ratio and Surface Temperature at Sea

Journal of Physical Oceanography, 1977
Gradients of temperature and humidity above water surfaces are analyzed in order to determine the dependence of the long-term average Bowen ratio ..beta.. (the ratio of sensible to latent heat flux) on surface temperature. The least-squares fit that results from investigation of six such bodies of data, and which is supported by recent direct ...
B. B. Hicks, G. D. Hess
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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.
openaire   +1 more source