@article{fdi:010009921,
  title = {{E}xamination of the difference between radiative and aerodynamic surface temperatures over sparsely vegetated surfaces},
  author = {{C}hehbouni, {A}bdelghani and {L}o {S}een, {D}. and {N}joku, {E}.{G}. and {M}onteny, {B}runo},
  editor = {},
  language = {{ENG}},
  abstract = {{A} four-layer hydrologic model, coupled to a vegetation growth model, has been used to investigate the differences between aerodynamic surface temperature and radiative surface temperature over sparsely vegetated surface. {T}he rationale for the coupling of the two models was to assess the dependency of these differences on changing surface conditions (i.e., growing vegetation). {A} simulation was carried out for a 3-month period corresponding to a typical growth seasonal cycle of an herbaceous canopy in the {S}ahel region of {W}est {A}frica ({G}outorbe et al., 1993). {T}he results showed that the ratio of radiative-aerodynamic temperature difference to radiative-air temperature difference was constant for a given day. {H}owever, the seasonal trend of this ratio was changing with respect to the leaf area index ({LAI}). {A} parameterization involving radiative surface temperature, air temperature, and {LAI} was then developed to estimate aerodynamic-air temperature gradient, and thus sensible heat flux. {T}his parameterization was validated using data collected over herbaceous site during the {H}apex-{S}ahel experiment. {T}his approach was further advanced by using a radiative transfer model in conjunction with the above models to simulate the temporal behavior of surface reflectances in the visible and the near-infrared spectral bands. {T}he result showed that sensible heat flux can be fairly accurately estimated by combining remotely sensed surface temperature, air temperature, and spectral vegetation index. {T}he result of this study may represent a great opportunity of using remotely sensed data to estimate spatiotemporal variabilities of surface fluxes in arid and semiarid regions. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{BIOCLIMATOLOGIE} ; {FLUX} {THERMIQUE} ; {BILAN} {ENERGETIQUE} ; {TRANSFERT} {RADIATIF} ; {MODELISATION} ; {TELEDETECTION} {SPATIALE} ; {INDICE} {DE} {VEGETATION} ; {AFRIQUE} {DE} {L}'{OUEST} ; {ZONE} {SAHELIENNE}},
  booktitle = {},
  journal = {{R}emote {S}ensing of {E}nvironment},
  numero = {58},
  pages = {177--186},
  ISSN = {0034-4257},
  year = {1996},
  DOI = {10.1016/{S}0034-4257(96)00037-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010009921},
}