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Spatial distribution of the air temperature in mountainous areas using satellite thermal infra-red data
Abstract : 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.
Cited literature [5 references]
https://hal.ird.fr/ird-00667480
Contributor : Dominique Bruel <>
Submitted on : Tuesday, February 7, 2012 - 4:54:59 PM
Last modification on : Friday, March 27, 2020 - 2:04:48 AM
Document(s) archivé(s) le : Tuesday, May 8, 2012 - 2:38:11 AM
Contributor : Dominique Bruel <>
Submitted on : Tuesday, February 7, 2012 - 4:54:59 PM
Last modification on : Friday, March 27, 2020 - 2:04:48 AM
Document(s) archivé(s) le : Tuesday, May 8, 2012 - 2:38:11 AM
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