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SOURCES PUITS CO 2 Global Budget (GtC yr -1 ) (1 GtC = 10 15 gC)

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Presentation on theme: "SOURCES PUITS CO 2 Global Budget (GtC yr -1 ) (1 GtC = 10 15 gC)"— Presentation transcript:

1 SOURCES PUITS CO 2 Global Budget (GtC yr -1 ) (1 GtC = 10 15 gC)

2 CO 2 emissions (1E 3 tC/yr) Europe USA Germany France China Japan India Anthropogenic CO 2 emissions 6.3 GtC yr -1 in 1990's 200.000 400.000 600.000 800.000 1.000.000 1.200.000 1.400.000 1.600.000 18001850190019502000 0

3 Anthropogenic Greenhouse Gases Emissions (district scale) CO 2 (Fossil fuel emissions) CH 4 N2ON2ON2ON2O Garg et al., 2001 Fossil Fuel133 Tg C CDIAC Biofuel167 Tg C Yevich et Logan, In press

4 How can we estimate CO 2 fluxes ? Ill-posed problem Error amplification DOWNSCALING Inverse modeling of atmospheric transport UPSCALING Extrapolation Strong heterogeneity Forest inventories - local (1ha) Flux towers (1-10 km 2 ) Direct models - biospheric - Oceanic (1-5000 km 2 ) Ocean studies Extrapolated  pCO 2 measurements Regional scale 10 5 - 10 6 km 2 Atmospheric tracer

5 Inverse mode CO 2 net fluxes a priori estimation x b ; var/cov P Atmospheric transport H Atmos. Conc. simulated y model Observations y o ; var/cov R Atmospheric transport model Forward mode Sc -   (  C V ) = (  C)  tt

6 Mt Abu Hanle

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