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weller2
Guest
Addendum on natural CO2 variability.
As you can see in the above graph, there was a sharp increase in atmospheric content of CO2 at the end of Permian – it jumped from ca. 300ppm to 2000ppm. This increase corresponds to the Permian-Trassic extinction event, which wiped out 96% of marine life and 70% of land life:
en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event
Coincidentally, such CO2 levels (1000-2000ppm) is what we will have around 2100 provided that emissions are not reduced.
As you can see in the above graph, there was a sharp increase in atmospheric content of CO2 at the end of Permian – it jumped from ca. 300ppm to 2000ppm. This increase corresponds to the Permian-Trassic extinction event, which wiped out 96% of marine life and 70% of land life:
en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event
Coincidentally, such CO2 levels (1000-2000ppm) is what we will have around 2100 provided that emissions are not reduced.