%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Boudhar, A.
%A Duchemin, Benoît
%A Hanich, L.
%A Boulet, Gilles
%A Chehbouni, Abdelghani
%T Spatial distribution of the air temperature in mountainous areas using satellite thermal infra-red data
%D 2011
%L fdi:010053381
%G ENG
%J Comptes Rendus Geoscience
%@ 1631-0713
%K Air temperature ; Landsat ETM ; Snow-covered areas ; Moroccan High-Atlas
%M ISI:000288152500004
%N 1
%P 32-42
%R 10.1016/j.crte.2010.11.004
%U https://www.documentation.ird.fr/hor/fdi:010053381
%> https://www.documentation.ird.fr/intranet/publi/2011/03/010053381.pdf
%V 343
%W Horizon (IRD)
%X Understanding the spatial distribution of air temperature in mountainous areas is essential in hydrological modelling. In the Moroccan High-Atlas range, the meteorological stations network is sparse. In order to get additional information, we investigated the thermal infrared data supplied by the Enhanced Thematic Mapper (ETM +) sensor onboard the Landsat 7 satellite. The brightness temperature derived from ETM+ images is used as a proxy for air temperature to set up a model that describes its spatial distribution. This model accounts for sun location and topographic characteristics derived from the SRTM digital elevation model. It was evaluated on the Rheraya watershed, a 225-km(2) region located within the semi-arid High-Atlas mountain range, using two different sources of data. The first data set consists in in-situ air temperature collected by meteorological stations installed during the experiment at various altitudes from 1400 to 3200 m. The second data set is satellite estimates of snow-covered areas (SCA) derived from MODIS images over the whole catchment at 500 m spatial resolution.
%$ 021 ; 126