(2) None of these models are reversible. Put in a starting point of today's conditions, set the time increment to -1, and run the simulation backwards for 100 years. What comes out will be nothing like the world as it actually was in 1900. If we can't accuratly predict what happened in the past, how can we have any belief that the models tell us anything meaningful about the future?
This isn't so important. You can just put in the data for 1900 and run simulation to see if the result is like the present. This is a fairly standard way of testing a simulation and is used in the article with the Anasazi.
You would need a completely different strategy to predict what happened in the past. I doubt it's possible or that the results would be very useful.
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This isn't so important. You can just put in the data for 1900 and run simulation to see if the result is like the present. This is a fairly standard way of testing a simulation and is used in the article with the Anasazi.
You would need a completely different strategy to predict what happened in the past. I doubt it's possible or that the results would be very useful.