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Politics : Foreign Affairs Discussion Group
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To: Nadine Carroll who wrote (224262)3/15/2007 10:50:29 PM
From: Win Smith   of 281500
 
Ok, I looked up this Nir Shaviv, and he seems to be heavily into correlation of a curiously selective sort, apparently somewhat outside his area too. Cf:

We review the evidence linking cosmic ray flux (CRF) variations to global climate change. In particular, we summarize recent results demonstrating that the long-term CRF variability associated with galactic spiral arm passages is the dominant climate driver over geological time scales. This can be concluded from the large correlation apparent between the reconstructed CRF history and the geologically reconstructed temperature record, and the lack of any correlation with the amount of atmospheric CO2. The result can be used to quantify the CRF/temperature link and place an upper limit on the atmospheric response to CO2 variations. In turn, we show that this can be used to resolve the faint sun paradox and understand the origin of the global warming observed over the past century. eproceedings.worldscinet.com

Ok, nothing about sunspots there and it doesn't look to be worth $20 to read about some random astrophysicist's contribution to the conservative cause. On the alleged "lack of any correlation with the amount of atmospheric CO2" there is by contrast this from the charts and graphs department: www.exo.net/.../globalclimate/IceCores1.gif , from exo.net . Dr. Shaviv is apparently quite, er, conservative in what he considers correlation.
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