At 11:33 PM 11/28/2006, James Annan wrote:
>James Annan wrote:
>
> > Even if one assumes the premise that we are "optimally adapted" to the
> > present climate (which I think would be difficult to rationally defend),
> > it does not follow that changes to the climate would result in net costs.
>
>Interestingly (to me at least), David Archer has backed down
>significantly on his original assertion.
>
>http://www.realclimate.org/index.php/archives/2006/11/avery-and-singer-unstoppable-hot-air/#comment-21686
>
>"the present-day warmth, which is comparable to the recent past and
>arguably even beneficial"
>
>Even though he is only conceding the possibility, rather actually making
>the claim (that the warming has been beneficial), this is not the sort
>of comment that is often heard in climate science circles.
>
>James
I think you should at least quote the complete sentence that David
Archer wrote, which is:
"I think Avery's trick was to muddy the distinction between the
present-day warmth, which is comparable to the recent past and
arguably even beneficial, with the forecast for the coming century,
which is neither of those things."
I'm not sure what you mean by saying Archer has "backed down
significantly on his original assertion." His original RealClimate
post included the following:
"Point. Human populations of Europe and India thrived during the
medieval warm time, so clearly warming is good for us.
"CounterPoint. No one asserts that the present-day warmth is
a calamity, although perhaps some residents of Tuvalu or New
Orleans might feel differently, and the Mayans may have been
less than enthusiastic about the medieval climate. The projected
temperature for 2100 under business-as-usual is another matter
entirely, warmer than the Earth has been in millions of years."
Jim
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