CACTUSJACKmankin
Scientist
No but we know what warming trends and atmospheric carbon loads were like in the past.So, do you have paleoclimatology "evidence" that human induced global warming happened in the past? No. You only have evidence that global warming happened, but it wasn't induced by us. I've never saw a model to explain either the medieval warm period or the little ice age, but regardless of that inability they happened.
Maybe the medieval warm period was caused by global burning of evil witches...
A natural explosion in greenhouse gas loads in the jurassic raised the average temperature of the earth by 5*C.
http://sheba.geo.vu.nl/~vonh/imagesanddata/data/Cohenetal2004.pdf
So the mechanism of greenhouse gas loads as a cause for increased temperature change is well founded. So increasing carbon loads artificially will have a similar effect.
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