What does the 'scientific consensus' say?
'The Working Group I (WGI) WGI FAR noted that past climates could
provide analogues. Fifteen years of researchsince that assessment has
identified a range of variations and instabilities in the climate
system that occurred during the last 2 Myr of glacial-interglacial
cycles and in the super-warm period of 50 Ma. These past climates do
not appear to be analogues of the immediate future...'
http://ipcc-wg1.ucar.edu/wg1/Report/AR4WG1_Print_Ch01.pdf
There is an essential difference between paleoclimatic co2 and todays
co2 - in the paleo co2 concentrations were feedbacks.
'About the only thing that seems like a safe inference from the Vostok
record is that temperature drives CO2 variations – even Hansen’s
theory requires that much — but the view that CO2 then caused most of
the temperature variations seems exceedingly speculative.'
http://www.drroyspencer.com/2009/06/ice-ages-or-20th-century-warming-it-all-comes-down-to-causation/
speculative best describes Alistairs ponderings
On Jan 18, 10:53 am, "David B. Benson" <[email protected]> wrote:
> On Jan 17, 9:03 am, Michael Lewis <[email protected]> wrote:> The
> problem with these kinds of studies ...
>
> The relationship between CO2 and climate has been
> well-understood for over 30 year now.
> Charney et al. 1979 NRC/NAS
> report:http://books.nap.edu/openbook.php?record_id=12181&page=R1
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