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Cycle du carbone dans un modèle de surface continentale : modélisation, validation et mise en oeuvre à l'échelle globale

Abstract : ISBA-A-gs is an option of the CNRM land surface model ISBA which allows for the simulation of carbon exchanges between the terrestrial biosphere and the atmosphere. The model was implemented for the first time at the global scale as a stand-alone model. Several global simulations were performed to assess the sensitivity of the turbulent fluxes and Leaf Area Index to a doubling of the CO2 atmospheric concentration, and to the climate change simulated by the end of the 21st century. In addition, a new option of ISBA, referred to as ISBA-CC, was developed in order to simulate a more detailed ecosystem respiration by separating the autotrophic respiration and the heterotrophic respiration. The vegetation dynamics and the carbon fluxes were validated at a global scale using satellite datasets, and at a local scale using data from 26 sites of the FLUXNET network. All these results show that the model is sufficiently realistic to be coupled with a general circulation model, in order to account for interactions between the terrestrial biosphere, the atmosphere and the carbon cycle.
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https://tel.archives-ouvertes.fr/tel-00164054
Contributor : Jean-Pierre Javelle <>
Submitted on : Thursday, July 19, 2007 - 1:21:13 PM
Last modification on : Monday, April 5, 2021 - 2:26:11 PM
Long-term archiving on: : Thursday, April 8, 2010 - 11:38:54 PM

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  • HAL Id : tel-00164054, version 1

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Anne-Laure Gibelin. Cycle du carbone dans un modèle de surface continentale : modélisation, validation et mise en oeuvre à l'échelle globale. Climatologie. Université Paul Sabatier - Toulouse III, 2007. Français. ⟨tel-00164054⟩

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