Measurements of evaporation from fallow Sahelian savannah at the start of the dry season

Gash, J H C and Wallace, J S and Lloyd, C R and Dolman, A J and Sivakumar, M V K and Renard, C (1991) Measurements of evaporation from fallow Sahelian savannah at the start of the dry season. Quarterly Journal of the Royal Meteorological Society, 117 (500). pp. 749-760. ISSN 1477-870x

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Abstract

Micrometeorological measurements of evaporation were made for the first six weeks of the dry season at a fallow savannah site in the Sahel. The evaporation fell from typically 4.5 mm per day at the start of the dry season to 1.5 mm per day six weeks later. The surface conductance was modelled in terms of empirical functions of time of day, and the number of days since the final rain of the season. It was found that there was little variation in surface conductance within each day, with no significant correlation with solar radiation and only a weak correlation with humidity deficit. Daily values of the surface conductance necessary to estimate the actual evaporation, from the data provided by a standard climate station, were also derived.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Others > Soil Science Others > Climate Change
Depositing User:	Mr Charan Sai Ch
Date Deposited:	26 Oct 2011 10:04
Last Modified:	14 Sep 2013 12:03
URI:	http://oar.icrisat.org/id/eprint/2884
Official URL:	http://dx.doi.org/10.1002/qj.49711750005
Projects:	UNSPECIFIED
Funders:	Overseas Development Administration, Natural Enviroment Research Council, AJD holds a CEGB Senior Research Fellowship, Joint Environmental Programme of National Power and PowerGen
Acknowledgement:	UNSPECIFIED
Links:	Author

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