Since I have a few minutes spare I thought I would highlight another laugh aloud post from the Global Warming Policy Forum (GWPF). It’s about Arctic sea ice growing back to 2006 levels. Wow, amazing, what a turnaround after spending a reasonable fraction of the past year at record lows.I thought I would go and look at the data. The figure on the right shows the sea ice extent for 2012 (dashed line), 2016 (red), 2017 (light blue) and 2006 (purple), together with the 1981-2010 average and the 2 standard deviation. It does indeed show that the sea ice extent is the same as 2006, on 23 January, and only on 23 January. In other words, the GWPF claim is based on sea ice extent on a single day in 2017 being the same as it was on the same day in 2006. Do they not understand the concept of variability? You can treat that as rhetorical.
I do find it hard to believe that those involved do not get just how ridiculous such a claim actually is, so have to assume that this is partly to deceive those who might not, and partly just clickbait. I fully expect to see claims elsewhere that Arctic sea ice has grown back to 2006 levels, with links back to this GWPF post. As I’ve said before, sometimes all you can do is laugh.