VERSION|0.5.1|NAME|Administrator (Rev. Dr. Peter Hearty)|DATE|1370595134|CONTENT|Before anyone gets onto the subject of butterflies and chaos theory, I thought I'd provide a link to a small modelling experiment.

[url=http://mustelid.blogspot.co.uk/2005/10/butterflies-notes-for-post.html]http://mustelid.blogspot.co.uk/2005/10/butterflies-notes-for-post.html[/url]

Two runs of a weather forecast simulation are run. They differ in pressure in the two runs in one square of the surface pressure.

Run 1 99424.80078124999
Run 2 99424.80078125009

Or 1 part in 10^-15 in one square of the simulation. Within four weeks, the weather predictions are completely different.

Of course, this doesn't mean that a butterfly could have that effect. The size of one side of a square in this model is 300km, which makes it a fairly big butterfly. It's simply an illustration of how even a relatively small variation in the starting conditions of a chaotic system can cause the outputs to diverge.|IP-ADDRESS|94.168.119.214|MODERATIONFLAG|
