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

[William Robertson <wrobert9@ix.netcom.com>]

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.

Bill


William C. Robertson
Bill Robertson Science, Inc.


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

> http://betternature.wordpress.com/2009/11/12/co2-lag-during-ice-ages/
>
> John Mallinckrodt
> Cal Poly Pomona
>
> marx@phy.ilstu.edu 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.
>
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
> https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l