> -----Original Message-----
> From: Larry White [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, December 28, 2004 7:13 PM
> To: CF-Community
> Subject: Re: Global Warming (Re: Epic devestation in Asia)
> 
> Well, I'm a little more cynical. For years, every time there's an
> El Nino condition these experts make predictions for weather
> conditions on the west coast that are no more accurate than guesses.
> As you say, "We're talking about small, but important changes to a vast
> system", so now we're to believe these same people have figured
> out the outcome of long term global weather conditions, based on
> small changes to a much larger weather model?

Sometimes those vast changes are easier to predict that small, local
changes; especially in well-understood systems.

For example, consider a drop a food coloring being added to a clear bucket
of water.  You can easily predict the resulting concentration, dispersal
rate and even, to an extent, the dispersal pattern.

A guess won't help here (you might guess, for example, that all the dye will
collect in the bottom left-hand corner of the bucket - you'd be wrong).

However the specifics of the event - the exact shape, direction and speed of
the dispersal - are almost impossible to predict accurately.  You can get
close, of course.  You can create models that show realistically how it
would happen, but the specifics are impossible to predict.

Weather is very much like that.  You do get close (weather reporting is
vastly more accurate than guessing), but not exact.  However the broader
trends are clearly predictable.

We're also not talking about "weather" (which is specific regional
conditions) but rather climate.  Climatology has its grey areas (as do all
sciences) but is surprisingly advanced and is not limited to just the past
few years (or centuries). 

Lastly the people working on global climate change research are not "the
same people" that are pimping the weather on your local TV station.  ;^)

Jim Davis




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