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Centre d'études spatiales de la biosphère |  |
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Centre d'études spatiales de la biosphère | |
| HAL: ird-00667480, version 1 |
| DOI: 10.1016/j.crte.2010.11.004 |
| IRD Horizon id: fdi:010053381 |
| Detailed view |  Export this paper |
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| Comptes Rendus Géoscience 343, 1 (2011) 32-42 |
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| Spatial distribution of the air temperature in mountainous areas using satellite thermal infra-red data |
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Abdelghani Boudhar 1Benoît Duchemin 2 |
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| (2011) |
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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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| 1: | Faculté des Sciences SEMLALIA (FSSM) |
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Université Cadi Ayyad (Marrakech, Maroc) |
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| 2: | Centre d'études spatiales de la biosphère (CESBIO) |
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CNRS : UMR5126 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| subject | : | Life Sciences/Ecology, environment/Ecosystems Engineering Sciences/Other |
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| Air temperature – Landsat ETM – Snow-covered areas – Moroccan High-Atlas |
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| Attached file list to this document: | |||||
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| ird-00667480, version 1 | |
| http://hal.ird.fr/ird-00667480 | |
| oai:hal.ird.fr:ird-00667480 | |
| From: Dominique Bruel | |
| Submitted on: Tuesday, 7 February 2012 16:54:59 | |
| Updated on: Monday, 13 February 2012 21:40:59 | |
