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Laboratoire des sciences du Climat et de l'Environnement

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  • 1. Mesurer le carbone depuis l’atmosphère Léonard Rivier Laboratoire des Sciences du Climat et de l’Environnement (LSCE) 6 mai 2008
  • 2. Des emissions de CO2 qui augmentent de plus en plus vite, tirées surtout par les PVD Raupach et al., PNAS, 2007
  • 3. Canadell, PNAS, 2007 Budget of atmospheric CO 2 Source from land use change Source from fossil-fuel emissions Ocean sink Land sink 1960-2005: 45% of total emissions remain in atmosphere Atmospheric accumulation = F Foss + F LUC + F LandAir + F OceanAir
  • 4.
    • Deux approches complementaires pour calculer les flux de surface:
    • Mesures de concentrations dans l’atmosphere
    • Mesures de flux au niveau des ecosystèmes
    Impact de la canicule de l’été 2003 sur les flux de CO2 Ciais et al., Nature, 2005
  • 5. ICOS – Integrated Carbon Observation System www.icos-infrastructure.eu
  • 6.  
  • 7. A1 A2 B1 B2 Scenario Group A1F A1B A1T --------------------------------------------------------------------------------------------- Population growth L L L L H L M GDP growth VH VH VH VH M H M Energy use VH VH VH H H L M Resource availability H H M M L L M Pace and direction of technological FAST FAST FAST FAST SLOW MED MED change Favoring : COAL OIL BALANCED NON-FOS EFFICIENT GAS REGIONAL AS USUAL Les grandes familles des scénarios SRES IPCC Changement climatique IPCC, 2001
  • 8.