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Etude numérique du rôle des interactions entre la surface et l'atmosphère dans le cadre d'un changement climatique aux hautes latitudes nord

Abstract : To gain confidence in climate predictions, climate models must accurately represent the climatic system. But, terrestrial surface-atmosphere interactions remain simplified in most atmospheric general circulation models (AGCMs). Therefore, the aim of this study was to contribute to the understanding of the role of the surface in boreal climate, particularly sensitive to climate changes, and in their climate sensitivity. Two boreal terrestrial surface characteristics, frozen grounds and inundated zones (lakes and wetlands) were introduced in the surface scheme of AGCM LMDz. We quantified their respective impact on different climates (present-day, Last Glacial Maximum, future). Atmospheric methane emissions from simulated (by LMDz) wetlands were estimated from the LGM. Thermal regime of frozen grounds was examined in the late european reanalysis.
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https://tel.archives-ouvertes.fr/tel-00004185
Contributor : Estelle Poutou <>
Submitted on : Thursday, January 15, 2004 - 5:14:56 PM
Last modification on : Thursday, November 19, 2020 - 3:54:26 PM
Long-term archiving on: : Friday, April 2, 2010 - 8:01:08 PM

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  • HAL Id : tel-00004185, version 1

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Estelle Poutou. Etude numérique du rôle des interactions entre la surface et l'atmosphère dans le cadre d'un changement climatique aux hautes latitudes nord. Sciences de la Terre. Université Joseph-Fourier - Grenoble I, 2003. Français. ⟨tel-00004185⟩

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