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Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: Maurice Winn who wrote (25162)9/7/2009 6:48:40 AM
From: Bread Upon The Water  Read Replies (1) | Respond to of 36918
 
I don't much disagree that computer models, or any models, can be flawed. They are subject to any errors in design or input.

On the other hand they can be wonderful tools when accurately representing a situation. If you ever get to San Francisco do drop in on the Army Corp of Engineer's model of the water flow in SF Bay and tributaries. Last time I was there it was housed in a warehouse in Sausalito---a 25 minute ferry boat ride across the bay.

We probably ought be talking about why particular models are either accurate/inaccurrate with respect climate change. (Me finding he Hansen links would help in this regard.)



To: Maurice Winn who wrote (25162)9/7/2009 12:07:19 PM
From: TigerPaw  Read Replies (2) | Respond to of 36918
 
it's that computers do exactly what people tell them to do.

This is not strictly true when you add in the I/O to the calculations. Many algorithms can exhibit chaos when confronted with variations in timing, or order of calculation. One advantage of computers is they can repeat the calculation and get a statistical summary of the anticipated variations.

TP


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