Re: [asa] FW: Temperature Monitors Report Widescale Global Cooling

Don/Dave,
  The summary to which I referred is here:
http://www.calvin.edu/archive/asa/200802/0203.html

No, I did not mean your restatement of my last sentence, or at least I
didn't mean only that. I intended to be broader and cover time scales,
trends, and causes. The primary uncertainty that is left is the timescale of
reaching equilibrium and the biggest uncertainty there is the impact of
clouds with a second uncertainty in the dynamics of ice sheet melting. The
interdependency of temperature and carbon dioxide in the oceans and the
atmosphere are largely understood, though, as usual, continued refinement
and improvement will always be needed.
  In the post to which I refer above, I note that the anthropogenic origin
of our current rise in atmospheric carbon can be shown quite conclusively
from coral records of C-13/C-12 rations. The historical global climate
records document the close correlation between global temperature and carbon
levels. Depending on the dominant forcing at the time, either the
temperature or the carbon can drive the cycle. From the equilibrium data, we
can see that carbon is driving the cycle at this time.
  As for remediation schemes, I confess to being pessimistic. I suppose the
best course is widespread conservation measures. I wish there were a viable
scheme for sequestering carbon of large scale coal plants. If that existed,
it would be by far the most important.

  Randy

>
> I assume in your last sentence that you mean:
>
> "Skepticism of models is no longer an excuse for being a skeptic that GW
> is mainly caused by anthropogenic effects."
>
> GW can be detected simply by looking at climate records and is totally
> independent of the models. The models only have to do with determining
> the cause(s).
>
> Don
>
> As I have argued before on the list, even if you are skeptical about
> anthropogenic causes of GW, that many of the remediations in any sensible
> scheme are shared with reducing use of oil/energy and with reducing
> pollution in cities.
>
> Dave W (CSCA)
>
>
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Received on Fri Feb 29 11:08:13 2008