On Fri, 07 Mar 2008 16:04:36 -0600, Cecil Moore wrote:

Michael Coslo wrote:
Give how's and whys. Not political verbiage.

OK, how about this? Global warming has always run in cycles of 100K+/-
years. Man obviously had no effect on the previous cycles.

Obviously. The 4004 BC crowd has some issues with even that! 8^)


The
temperature 130,000 ago averaged 4 degrees higher than any temperature
during the present cycle. The maximum temperature during the present
cycle occurred 8000 years ago when man obviously had no effect.

Cyclic variation is not the issue. Many things can cause average global
temperature to vary. Insolation, the amount of greenhouse gases emitted
by other sources, volcanism, possible methane clathrate releases are all
modifiers.

During earlier days in our solar system, the sun was a good deal
dimmer, like 30 percent, 4 billion years ago. And yet, during much of
the time, average global temperatures were higher than today. While
creation science argues otherwise:

http://www.creationscience.com/onlin...ciences10.html

http://www.answersingenesis.org/tj/v15/i2/faintsun.asp

it is quite likely that CO2 from volcanism could take care of that issue.

We are
now 8000 years into the next ice age.

And a fascinating ice age it is! 8^) Looking at the timelines of
recent ice ages, it is beyond my ability to tell just where we are. If
we are in a glaciation period, the interglacial was the shortest one
known. By your statement, the interglacial was around 2000 years. But
your data and mine are radically different.

Any global warming effect provided
by man's greenhouse gases will tend to delay the plunging temperatures
associated with the presently approaching ice age and save tens of
millions of people from starving to death due to the farmlands being
overrun by glaciers.

What I see here is the old either/or problem. You can't have it both
ways. Because there are natural fluctuations in global average
temperature does not mean that adding our own contribution is negligent.
IOW, it isn't a choice between the two.

Wherever we are in the cycle of global average temperature, and for
whatever reasons we are there, what we are doing is either having an
effect because of physics, or it isn't because of mitigating physics that
we don't understand yet.

--
-73 de Mike N3LI -