Re: article in latest sci american

From: Joe Zorzin (abc_at_xyz.org)
Date: 02/14/05 

Date: Mon, 14 Feb 2005 07:49:33 -0500

<lifeform1@atlantic.net> wrote in message
news:1108302947.555764.107580@o13g2000cwo.googlegroups.com...
> February 13, 2005
>
> Joe Zorzin wrote:
>
> > The most recent Scientific American (just got it yesterday) has an
> article
> > which says that agriculture and deforestation of the past several
> thousand
> > years have contributed to global warming and countered what otherwise
> would
> > have been slowly lowering temperatures that would have brought us to
> the
> > brink of another ice age. I'm no scientist, but this sounds like a
> > rationalization for global warming.
>
>
> The Milankovitch modulation of solar insolation
> is already into the cooling phase, but the
> climatic response to the modulation is offset
> (out of phiase, lagging) by a quarter wave,
> so we've got a good 10,000 years left of an
> expected interglacial period. Not to worry.

What is the average time span of interglacial periods? That's the point I
was getting at- if the average time is tens of thousands of years, then
isn't it unlikely that we would be heading toward another glacial period if
it hadn't been for all these naked apes plowing the ground and whacking the
forests? And, of course, I accept the fact that such activity does
contribute to global warming- but how much?

Joe

>
> Thomas Lee Elifritz
> http://elifritz.members.atlantic.net
>

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