| type de publication : |
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Articles dans des revues avec comité de lecture |
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| domaine : |
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| titre : |
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Spatial distribution of the air temperature in mountainous areas using satellite thermal infra-red data |
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| auteur(s) : |
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Abdelghani Boudhar ( ) 1, Benoît Duchemin 2, Lahoucine Hanich 1, Gilles Boulet 2, Abdelghani Chehbouni 2 |
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| laboratoire : |
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| résumé : |
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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. |
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langue du texte
intégral : |
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Anglais |
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| journal : |
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| Comptes Rendus Géoscience |
| Publisher |
Elsevier |
| ISSN |
1631-0713 |
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| Audience : |
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non spécifiée |
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| date de publication : |
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2011 |
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| volume : |
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343 |
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| numéro : |
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1 |
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| page, identifiant, ... : |
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32-42 |
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| mots-clés : |
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Air temperature – Landsat ETM – Snow-covered areas – Moroccan High-Atlas |
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