Repository: Freie Universit├Ąt Berlin, Math Department

Estimation of wet surface evaporation from sensible heat flux measurements

Vercauteren, N. and Bou-Zeid, E. and Huwald, H. and Parlange, M. B. and Brutsaert, W. (2009) Estimation of wet surface evaporation from sensible heat flux measurements. Water Resources Research, 45 (6).

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A new method is proposed to estimate wet surface evaporation by means of measurements of sensible heat flux and of air temperature, relative humidity, and wind speed at one level only. This formulation is made possible by the linearization of the Bowen ratio, a common assumption in other methods, such as Penman's model and its derivatives. The method will be useful in those cases where the sensible heat flux is more reliably acquired at field scales than the net radiation and the ground heat flux, which are needed in many operational methods because of energy budget considerations. Indeed, the ground heat flux is a notoriously difficult variable to measure on wet surfaces, such as lakes or wetlands, especially at the appropriate length scales, whereas sensible heat flux can be obtained from standard temperature variance methods or other instruments such as scintillometers. The proposed method was tested with field experimental data taken over Lake Geneva in Switzerland, where it showed excellent agreement with evaporation rates measured using eddy covariance techniques.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics > Geophysical Fluid Dynamics Group
ID Code:1337
Deposited By: Ulrike Eickers
Deposited On:22 Nov 2013 15:23
Last Modified:22 Nov 2013 15:23

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