L`impact des Homo sapiens

L’homme, le changement climatique
et le futur
Source: NASA

L’impact des Homo sapiens

Soil 1600
Fossil fuel deposits 4000
Terrestrial vegetation 600
Atmosphere 750
Marine sediments and sedimentary rocks 66 000 000 –100 000 000
Deep and intermediate
ocean 38 000
Surface ocean 1 000
90 92
60
61.5
CDIAC, The Carbon Dioxide Information Analysis Center; The Encyclopedia of Earth
0.6
1.5
Land use changeFossil fuel emissions
9.5
Units are Gt of carbon
Le cycle du carbone

Nous pouvons reconstruire le passé
Sources: NOAA Paleoclimatology Program/Department of Commerce;
Jeremy Shakun/Harvard University

Les modèles montrent l’impact humain
Source: IPCC AR4, 2007