Monthly Archives: July 2013

Misunderstanding Period Analysis

A post by Willis Eschenbach introduces something called the”periodicity transform” and extolls its virtues, suggesting that it’s superior in many ways to Fourier analysis. The method is very interesting, and in some situations quite useful, but it’s not the glorious improvement Willis seems to think it is — nor does Fourier analysis suffer from the flaws Willis seems to think it does. It’s also a recent method, but like most such innovations the core idea is not entirely new — there are strongly related methods that have been around for quite some time.

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Last week my wife and I travelled to a family gathering. My family is used to the fact that I advocate action to mitigate global warming. In fact, maybe they’re a little tired of it, so I don’t harp on the point. But they know that I’ve never been a doomsayer — in fact I’ve always scoffed at such things — so when I mention that it’s an existential threat to their children and grandchildren, they can’t help but take it seriously.

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When Wiggles Collide … or not

This post by David Archibald at WUWT extolls the virtues of “wiggle matching,” then applies it — or so it claims — to match the CET (Central England Temperature) from 1703 through 1737, to that from 1978 through 2012. Archibald then notes that the 1703-1737 period was soon followed by the unusually cold year 1740. His conclusion? That we might be in for a similar year of extreme cold in 2015.

There are lots of problems with his efforts, but the main one is that the wiggles don’t match.

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Granite Mountain Hotshots … RIP

The Granite Mountain Hotshots were truly heroes. Among the most elite fire-fighters in the world, not only were they “tough as nails,” one of the requirements for membership is “being nice.”

Sadly, I must say “were” because 19 of 20 members were killed fighting a wildfire in Arizona.