Guest essay by Eric Worrall
Back in May, Climate scientist Ed Hawkins published a scary spiral graph which appeared to show global warming leaping out at you. As a homage to Hawkins’ effort, I created a similar graph, covering the last 10,000 years, rather than just covering temperatures since 1850. The effect of the longer timescale is quite different to the Hawkins original.
The spiral graph is obviously more art than science, but it presents some interesting features. The radius of the circle is related to the temperature anomaly – warmer temperatures have a larger radius. The factors are obviously chosen for artistic impact – just as Hawkins’ factors were.
On a 10,000 year timescale the spiral graph does emphasise how cold modern temperatures are, compared to the rest of the Holocene – at least…
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