31 Aug '11, 4am

RealClimate: An exercise about meaningful numbers: examples ...: RealClimate: Is the number 2.14159 (here rounde...

RealClimate: An exercise about meaningful numbers: examples ...: RealClimate: Is the number 2.14159 (here rounde...

The red curves, representing the best-fit are all over the place, and they differ from one sequence to the next, although they are all part of the same original time series. But the point here is that we could get similar results for other frequencies, and the amplitude for the fits to the shorter sequences would typically be 4 times greater than a similar fit would give for the original 10,000 years long series (source code ). This is because there is a band of frequencies present in random, noisy and chaotic data, which brings us back to our initial point: any number or curve can be split into a multitude of different components, most of which will not have any physical meaning.

Full article: http://www.realclimate.org/index.php/archives/2011/08/an-...

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