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The study describes an approach to model the surface energy balance on the regional scale for the island of Sicily, Italy in the period of 1989 to 1992. The EVA model developed during the study integrates remote sensing data from NOAA AVHRR, meteorological data from synoptic stations and land cover information in order to rep- resent the spatial-temporal variability of energy fluxes at the land surface. The surface energy partitioning is described by the evaporative fraction that proved to be a suitable indicator of the moisture conditions at the land surface, thus showing potential for a drought-monitoring tool. Furthermore, daily rates of actual evapo-transpiration have been estimated from the evaporative fraction. While the absolute accuracy of the estimates remains comparable to standard approaches without using remote sensing data, the spatial representatively of the regional evapo-transpiration is considerably enhanced. Model results have been validated by point measurements at the surface and independent global circulation model output.

Additional information

Authors: NIEMEYER S, Geowissenschaftliche Fakultat der Albert-Ludwigs-Universitat Freiburg i. Br., (DE)
Bibliographic Reference: EUR 19523 EN (2000) 260pp., EURO: FREE of charge
Availability: Available from the Documentation service JRC Ispra Fax:+39-0332-785818
ISBN: ISBN N/A Ref: EUR 19523
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