Chehbouni Abdelghani, Lo Seen D., Njoku E.G., Lhomme Jean-Paul, Monteny Bruno, Kerr Y.H. (1995). Relationship between radiative and aerodynamic surface temperature over sparsely vegetated surfaces : estimation of sensible heat flux. In :
Stein T.I. (ed.). IGARSS'95 : quantitative remote sensing for science and application : advance program. Spring (USA) ; Bruxelles : IEEE ; URSI, p. 739-741. IGARSS'95 : Quantitative Remote Sensing for Science and Application : Advance Program : Symposium, Florence (ITA), 1995/07/10-14. ISBN 0-7803-2567-2.
Titre du document
Relationship between radiative and aerodynamic surface temperature over sparsely vegetated surfaces : estimation of sensible heat flux
Année de publication
1995
Type de document
Partie d'ouvrage
Auteurs
Chehbouni Abdelghani, Lo Seen D., Njoku E.G., Lhomme Jean-Paul, Monteny Bruno, Kerr Y.H.
In
Stein T.I. (ed.), IGARSS'95 : quantitative remote sensing for science and application : advance program
Source
Spring (USA) ; Bruxelles : IEEE ; URSI, 1995,
p. 739-741 ISBN 0-7803-2567-2
Colloque
IGARSS'95 : Quantitative Remote Sensing for Science and Application : Advance Program : Symposium, Florence (ITA), 1995/07/10-14
Radiative surface temperature has been widely used in past to estimate surface energy balance components from field to regional scales. This approach has been applied successfully over surfaces with near full vegetation cover; however, large discrepancies between measured and simulated surface fluxes have been observed over surfaces with sparse vegetation cover. The reason for these discrepancies is that the assumption that radiative surface temperature can be assimilated to aerodynamic surface temperature is not correct over sparsely vegetated surfaces. In the study an empirical parameterization relating aerodynamic surface temperature to radiative temperature and the leaf area index is used to estimate sensible heat flux over sparse shrub in the central east site during the Hapex Sahel experiment. The result shows that this parameterization leads to reasonable estimates of sensible heat flux, the RMSE was about 50 Wm/sup 2/
Plan de classement
Mécanisme du cycle de l'eau [062MECEAU]
;
Bioclimatologie générale [072BCLIGE]
;
Végétation / Forêt [126TELAPP08]
Descripteurs
RELATION CLIMAT COUVERT VEGETAL ; INTERFACE VEGETATION ATMOSPHERE ; FLUX THERMIQUE ; TRANSFERT DE CHALEUR ; BILAN ENERGETIQUE ; TEMPERATURE DE SURFACE ; VEGETATION ; ESTIMATION ; MODELISATION ; ETUDE EXPERIMENTALE ; TELEDETECTION
