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Re: [Phys-l] Global Warming

True. But such arguments are much more interesting when mad quatitiative.


Jack

On Tue, 13 Jun 2006, Shapiro, Mark wrote:

It's perfectly possible for there to be more than one "cause" for global
warming. We know that there are natural cycles that cause the earth to
warm and cool. However, none of the previous warming cycles have been
accompanied by a large injection of CO2 into the atmosphere since the
start of the industrial era. The concern, of course, is that this
additional contribution of greenhouse gases to the atmosphere could
cause it to warm more rapidly and more intensely than it has in the
past. There seems to be some evidence that the current warming is
increasing more rapidly than past cycles.

We can't control the natural warming cycle, but we can have an affect on
the manmade contributions of greenhouse gases to the atmosphere.

Dr. Mark H. Shapiro
Professor of Physics, Emeritus
California State University, Fullerton
Phone: 714 278-3884
FAX: 714 278-5810
email: mshapiro@fullerton.edu
web: http://chaos.fullerton.edu/Shapiro.html
travel and family pictures:
http://community.webshots.com/user/mhshapiro


-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu
[mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Jack
Uretsky
Sent: Tuesday, June 13, 2006 10:06 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Global Warming

Before I go to your URL, Jim, does it include research papers reported
witthin the past year?

Since it is a logical impossibility ever to "prove" a causal
relationship
of any kind, your reservations are meaningless.

In connection with your "problem", please tell mee what current
research
I am missing. Just cite 1 or 2 papers reporting original research
results
(no opinions or reviews) from peer-reviewed journals. The Greenland ice

core results were reported in Nature, within about the past year (I'm
way
behind in my reading).

As every lawyer knows, it is always possible to make an argument on any
side of any proposition. As many physicist knows, not all such
arguments
are credible.
Regards,
Jack



On Tue, 13 Jun 2006, JMGreen wrote:

At 08:33 PM 6/12/2006, you wrote:
My problem, Jim, is that you seem to avoid, totally, current
research on the subject. The Greenland ice cores were just reported
in
the past few months,
Also, the arguments need to be quantitative and in context.
The
current warming trend is accompanied by increases in greenhouse
gases.

Jack, did you read the URL that I gave? I thought not.

I twice tried to reproduce here the figure referenced there, but I
don't know how I guess. The data shows repeated global warming and
glaciations which follow those warmings. I don't doubt that we are
currently experiencing another warming period. I still wonder what
its cause is. I think that there is evidence that the cause is
natural, but I don't fully understand the explanations. But if the
data given there is correct, we are on the verge of another
glaciation. I can see that the current warming is _accompanied_ by
an increase in greenhouse gasses, but there doesn't seem to be proof
of the _cause_ of the warming. Just as there doesn't seem to be a
convincing proof of the cause of previous global warmings -- which
clearly were not due to greenhouse gasses -- at least not greenhouse
gasses produced by humans.

My problem, Jack, is that you seem to avoid, totally, current
research on the subject.

Jim


J M Green
Email: MailTo:JMGreen@sisna.com
WWW: HTTP://users.sisna.com/JMGreen

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