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Re: [Phys-l] Prof. Hal Lewis resigns from APS

Maybe someone can clear things up for me if I have this wrong. I was under the impression that Milankovitch cycles were generally accepted as the reason we have seen cycles of warming and cooling over the last 500,000 years. From the graphs I've seen, sometimes CO2 leads temperature and sometimes temperature leads CO2--a definite sign that a third factor is causing both. That's apart from the computer models based on drastic increases in CO2 lately. I would be interested in arguments that CO2 has driven temperature changes in the geologic past.


William C. Robertson
Bill Robertson Science, Inc.

On Oct 12, 2010, at 7:49 PM, A. John Mallinckrodt wrote:

John Mallinckrodt
Cal Poly Pomona wrote:

Every study of ice cores and other temperature proxy that is compared with
atmospheric CO2 shows that temperature leads CO2 increase by hundreds to
thousands of years.

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