Troufleau D. auteur aut IRD Lhomme Jean-Paul auteur aut IRD Monteny Bruno auteur aut IRD Vidal A. auteur aut IRD Moran M.S. auteur aut IRD text bookSection eng text/pdf reformatted digital access To estimate sensible heat flux using thermal infra-red temperature T/sub r/ over sparse semi-arid vegetation, a knowledge of either the corrective term kB/sup -1/ or the difference between radiometric and aerodynamic surface temperatures T/sub r/-T/sub o/ is usually required. Several experimental data sets acquired over various sparse vegetation in semi-arid areas (fallow savannah and millet field of HAPEX-Sahel, grassland and shrubland of MONSOON' 90) are used to study the experimental behavior of these variables. When considering the extreme variability of kB/sup -1/ and the difficulty in predicting its value, the relationship between T/sub r/ and T/sub o/ was more thoroughly studied and parameterized using the conceptual two-layer model of Shuttleworth and Wallace (1985) specialized RELATION CLIMAT COUVERT VEGETAL INTERFACE VEGETATION ATMOSPHERE TRANSFERT DE CHALEUR FLUX THERMIQUE TEMPERATURE DE SURFACE ESTIMATION MODELISATION ETUDE EXPERIMENTALE ETUDE COMPARATIVE TELEDETECTION INFRAROUGE ZONE SAHELIENNE ZONE SEMIARIDE 072BCLIGE 062MECEAU 126TELAPP08 Stein T.I. ed. edt IRD 2227-2229 Spring (USA) IEEE Bruxelles URSI 1995 IGARSS'95 : Quantitative Remote Sensing for Science and Application : Advance Program : Symposium, Florence (ITA), 1995/07/10-14 https://www.documentation.ird.fr/hor/fdi:010020951 10.1109/IGARSS.1995.524155 0-7803-2567-2 [F B010020951] https://www.documentation.ird.fr/hor/fdi:010020951 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_53-54/010020951.pdf IRD - Base Horizon / Pleins textes 2000-04-03 2023-02-22 fdi:010020951 fre