[Rhodes22-list] Question for Captain Lipton

[Ronald Lipton]

This is not a good day to talk about warming but...
On Apr 7, 2007, at 1:15 PM, Tootle wrote:

>
> Ron,
>
> Is there a warm breeze blowing off the lake?
>
> I know the answer to the following, do you?  You said, "The increase in
> carbon emission appears to fit the warming data well."  Because data  
> fits a
> curve, does it alway hold that it accurate or true?
No, but it means that the model and data have to be understood and  
tested,
model variations tried.  An the model tested against natural events  
that should
have a visible impact, like volcanic eruptions.
> Another question, could the fact that the earth is warming cause an  
> increase
> in atmospheric carbon?
The increase in atmospheric carbon is clearly
due to human effects, that is easy to calculate, since we know the  
total amounts of
hydrocarbons burned.  That is not in dispute.
> Another question, has the earths atmospheric level of carbon ever been
> higher than present levels?  If it was, what was the then global  
> weather
> like?
Before life evolved the atmosphere had almost no free oxygen, most was  
bound
in compounds like CO2.  The evolution of photosynthesis seems to have  
had a
major effect in releasing free oxygen from CO2 2-3 billion years ago.
>
> Ed K
>
> --  
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