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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Analysis of evaporative fraction diurnal behaviour
Agricultural and Forest Meteorology, Volume 143, No. 1-2, Year 2007
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Description
Experimental studies indicate that evaporative fraction (EF), the ratio between the latent heat flux and the available energy at the land surface, is a normalized diagnostic that is nearly constant during daytime under fair weather conditions (so-called daytime self-preservation). This study examines this observation and investigates contributions to the variability of EF due to environmental factors (air temperature, solar incoming radiation, wind velocity, soil water content or leaf area index). It is shown here that the phase difference between soil heat flux and net radiation needs to be characterized fully in application models that invoke EF daytime self-preservation. Further conditions under which the diurnally constant EF assumption can hold are also discussed. © 2006 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Gentine, Pierre
United States, Cambridge
Massachusetts Institute of Technology
Entekhabi, Dara
United States, Cambridge
Massachusetts Institute of Technology
Chehbouni, Abdelghani
France, Toulouse
Center for Space Studies of the Biosphere
Boulet, Gilles
France, Toulouse
Center for Space Studies of the Biosphere
Duchemin, Benoı̂t
France, Toulouse
Center for Space Studies of the Biosphere
Statistics
Citations: 221
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1016/j.agrformet.2006.11.002
ISSN:
01681923
Research Areas
Cancer
Environmental