From: Alexanian, Moorad <alexanian@uncw.edu>

Date: Mon Nov 30 2009 - 10:50:12 EST

Date: Mon Nov 30 2009 - 10:50:12 EST

I have not done any work on climate problems but it seems that when one uses differential equations they have to be converted into difference equations and so there are all sorts of possible ways to do that and stability of the solutions is very important. Also, one can consider certain global solutions and so perturbation theory near such known solutions but that is assuming maybe too much. The question that bugs me is if such models can predict ice ages, that is to say, very long range behaviors.

Moorad

-----Original Message-----

From: asa-owner@lists.calvin.edu [mailto:asa-owner@lists.calvin.edu] On Behalf Of Jon Tandy

Sent: Monday, November 30, 2009 10:03 AM

To: 'AmericanScientificAffiliation'

Subject: RE: [asa] The Mathematics of Global Warming

Someone with more expertise will have to answer this for me, but isn't this

a category error of sorts to compare the mathematics of weather prediction

with the patterns of climate change? The author seems to be talking

exclusively about the uncertainties of the dynamic system of predicting next

month's weather, and saying that is the same thing as global climate change;

which, if I understand it right, is based on long trends and observational

data, not just statistical models and differential equations? Whether AGW

turns out to be right, this criticism doesn't seem to be completely on the

mark. I know that climate predictions are based on mathematical models and

assumptions about conditions and functions, so how much do uncertain

mathematical calculations factor into the predictions of climate change

(i.e. global warming)? Do we know how much we don't know (i.e. the

potential factor of error)?

Jon Tandy

-----Original Message-----

From: asa-owner@lists.calvin.edu [mailto:asa-owner@lists.calvin.edu] On

Behalf Of John Walley

Sent: Monday, November 30, 2009 6:34 AM

To: AmericanScientificAffiliation

Subject: [asa] The Mathematics of Global Warming

I found this to be very interesting. I wonder if any of the mathematicians

on the list have any comment?

John

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Received on Mon Nov 30 10:50:42 2009

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