Boudhar A. auteur aut IRD Duchemin Benoît auteur aut IRD Hanich L. auteur aut IRD Boulet Gilles auteur aut IRD Chehbouni Abdelghani auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized Air temperature Landsat ETM Snow-covered areas Moroccan High-Atlas 021 126 343 1 32-42 2011 1631-0713 https://www.documentation.ird.fr/hor/fdi:010053381 10.1016/j.crte.2010.11.004 1631-0713 [F B010053381] https://www.documentation.ird.fr/hor/fdi:010053381 https://www.documentation.ird.fr/intranet/publi/2011/03/010053381.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-04-07 2017-08-23 fdi:010053381 fre