Articles | Volume 13, issue 11
Hydrol. Earth Syst. Sci., 13, 2179–2190, 2009
https://doi.org/10.5194/hess-13-2179-2009

Special issue: Advances in land surface hydrological processes – field...

Hydrol. Earth Syst. Sci., 13, 2179–2190, 2009
https://doi.org/10.5194/hess-13-2179-2009

  12 Nov 2009

12 Nov 2009

Footprint issues in scintillometry over heterogeneous landscapes

W. J. Timmermans1, Z. Su1, and A. Olioso2 W. J. Timmermans et al.
  • 1International Institute for Geo-information Sciences and Earth Observation, Dept. of Water Resources, P.O. Box 6, 7500 AA, Enschede, The Netherlands
  • 2UMR 1114 INRA-UAPV Environnement Méditerranéens et Modélisation des AgroHydrosystèmes (EMMAH), Site Agroparc, Domaine St. Paul 84914 Avignon Cedex 9, France

Abstract. Scintillometry is widely recognized as a potential tool for obtaining spatially aggregated sensible heat fluxes at regional scales. Although many investigations have been made over contrasting component surfaces, few aggregation schemes consider footprint contributions. In this paper, an approach is presented to infer average sensible heat flux over a very heterogeneous landscape by using a large aperture scintillometer. The methodology is demonstrated on simulated data and tested on a time series of measurements obtained during the SPARC2004 experiment in Barrax, Spain. Results show that the two-dimensional footprint approach yields more accurate results of aggregated sensible heat flux than traditional methods.