Skip to Main content Skip to Navigation
Journal articles

Spatialization of sensible heat flux over a heterogeneous landscape

Abstract : Two methods for retrieving sensible heat flux over a bare soil/wheat composite surface are compared. The first one is based on field measurements using large aperture scintillometers. The comparison with reference fluxes obtained from eddy correlation technique shows that scintillometry-derived fluxes are overestimated by 10%. A numerical experiment demonstrates this is induced by the non-uniform sensitivity of the scintillometer to C $_{\rm N}^2$ along the path length which follows a `bell-shaped' curve. The second method is based on the use of a simple surface energy balance model, SEBAL, supplied with high spatial resolution remote sensing data from two airborne sensors in visible, near infrared and TIR bands. A comparison with scintillometry-derived fluxes shows important discrepancies. These result from large errors in the estimation of the roughness length z 0 in the model. This demonstrates that the use of an empirical relationship based on NDVI only is inadequate for inferring this key parameter in SEBAL.
Document type :
Journal articles
Complete list of metadata
Contributor : Migration Prodinra <>
Submitted on : Friday, June 4, 2021 - 5:28:08 PM
Last modification on : Tuesday, September 7, 2021 - 3:44:42 PM
Long-term archiving on: : Sunday, September 5, 2021 - 8:54:05 PM


Files produced by the author(s)


Distributed under a Creative Commons Attribution 4.0 International License




Jean-Pierre Lagouarde, Frederic Jacob, Xing Fa Fa Gu, Albert Olioso, Jean-Marc Bonnefond, et al.. Spatialization of sensible heat flux over a heterogeneous landscape. Agronomie, EDP Sciences, 2002, 22 (6), pp.627-633. ⟨10.1051/agro:2002032⟩. ⟨hal-02681070⟩



Record views


Files downloads