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Etude de la synergie des observations satellites pour la caractérisation du manteau neigeux

Abstract : Snow is an important component of the terrestrial climate, it is necessary to study it on a global basis in order to understand its role.

This work aims a study of the information content on the snow cover at a global scale with the satellite observations provided by many instruments covering a broad band of the electromagnetic spectrum (visible, infra-red and microwaves). Some other parameters interfere in the problem, so it is necessary to determine them in order to frame their influences. Then, how to limit the pollution generated by these parameters on the accessible information of the snow cover? A response is given with the local statistics. But these local statistics are not available on the whole Earth.
Thus it is inevitable to use modeling to allow the interpolation. However an original adjustment method of the model using a principal component analysis will be presented. Finally, the synergy between the satellite observations, the model and the in situ measurement will be used to extract in an optimal way the information contained in the data and to allow the inversion of the snow depth at a large scale.
In addition, it will be interesting to characterize the different types of snow according to an unsupervised classification of the satellite observations in order to extract the similarities and specificities of each types.
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https://tel.archives-ouvertes.fr/tel-00089376
Contributor : Emmanuel Cordisco <>
Submitted on : Friday, August 18, 2006 - 9:41:59 PM
Last modification on : Thursday, October 29, 2020 - 3:01:26 PM
Long-term archiving on: : Monday, April 5, 2010 - 10:13:39 PM

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  • HAL Id : tel-00089376, version 1

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Emmanuel Cordisco. Etude de la synergie des observations satellites pour la caractérisation du manteau neigeux. Géophysique [physics.geo-ph]. Université Pierre et Marie Curie - Paris VI, 2005. Français. ⟨tel-00089376⟩

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