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Using thermal infrared temperature over sparse semi-arid vegetation for sensible heat flux estimation

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5 Author(s)
Troufleau, D. ; LCT CEMAGREF-ENGREF Maison de la Teledetection en Languedoc Roussillon, Montpellier, France ; L'Homme, J.P. ; Monteny, B. ; Vidal, A.
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To estimate sensible heat flux using thermal infra-red temperature Tr over sparse semi-arid vegetation, a knowledge of either the corrective term kB-1 or the difference between radiometric and aerodynamic surface temperatures Tr-To 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-1 and the difficulty in predicting its value, the relationship between Tr and To was more thoroughly studied and parameterized using the conceptual two-layer model of Shuttleworth and Wallace (1985)

Published in:

Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International  (Volume:3 )

Date of Conference:

10-14 Jul1995