Flux annuels en GtC (années 90)
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SOURCES PUITS CO 2 Global Budget (GtC yr -1 ) (1 GtC = 10 15 gC)
description
3.2 ± 0.1. 6.3 ± 0.4. -1.7 ± 0.5. -1.4 ± 0.7. 0.6 à 2.5. -4.6 à -1.3. CO 2 Global Budget (GtC yr -1 ). SOURCES. PUITS. Flux annuels en GtC (années 90). (1 GtC = 10 15 gC). Europe. USA. Germany. France. China. Japan. India. Anthropogenic CO 2 emissions 6.3 GtC yr -1 in 1990's. - PowerPoint PPT Presentation
Transcript of Flux annuels en GtC (années 90)
SOURCES PUITS
CO2 Global Budget (GtC yr-1)
(1 GtC = 1015gC)
CO
2 e
mis
sio
ns
(1E
3 t
C/y
r)
Europe
USA
Germany
France
China
Japan
India
Anthropogenic CO2 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
1800 1850 1900 1950 20000
AnthropogenicAnthropogenicGreenhouse GasesGreenhouse GasesEmissionsEmissions(district scale)(district scale) COCO22
(Fossil fuel emissions)(Fossil fuel emissions)
CHCH44
NN22OO
Garg et al., 2001Garg et al., 2001
Fossil Fuel 133 Tg C CDIAC
Biofuel 167 Tg C Yevich et Logan, In press
How can we estimate CO2 fluxes ?
Ill-posed problemError amplification
DOWNSCALING
Inverse modeling of atmospheric transport
UPSCALING
Extrapolation Strong heterogeneity
Forest inventories- local (1ha)
Flux towers(1-10 km2)
Direct models- biospheric- Oceanic
(1-5000 km2)
Ocean studiesExtrapolated pCO2
measurements
Regional scale105 - 106 km2
Atmospherictracer
Inverse mode
•CO2 net fluxesa priori estimation
xb ; var/cov P
Atmospheric transport
H
Atmos. Conc.simulated
ymodel
Observationsyo ; var/cov R
Atmospheric transport model
Forward mode
Sc - ( C V ) = ( C) t
Mt AbuHanle
