Sentences with phrase «palaeoclimate evidence»
Hansen and his colleagues summarise the challenge as follows: «If humanity wishes to preserve a planet similar to that on which civilisation developed and to which life on earth is adapted, palaeoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current 385ppm [parts per million] to at most 350ppm.»
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Ecological tree line history and palaeoclimate — review of megafossil evidence from the Swedish Scandes Leif Kullman Article first published online: 2 JAN 2013
Evidence from palaeoclimate records suggests that this circulation has changed dramatically in the past, and there is concern that it could be disrupted in the future.
Stolen e-mails have revealed no scientific conspiracy.To the denialists, the scientists» scathing remarks about certain controversial palaeoclimate reconstructions qualify as the proverbial «smoking gun»: proof that mainstream climate researchers have systematically conspired to suppress evidence contradicting their doctrine that humans are warming the globe.
The evidence from surface temperature observations is strong: The observed warming is highly significant relative to estimates of internal climate variability which, while obtained from models, are consistent with estimates obtained from both instrumental data and palaeoclimate reconstructions.