There isn't all that much fake skeptic nonsense going round when it comes to Arctic sea ice. Climate risk deniers rather just ignore the geologic time scale event going on up North that could lead to an ice-free Arctic Ocean within one human lifetime. Still, every now and then an effort is made to trivialize Arctic sea ice loss. In this case it is done by averaging all daily sea ice extent numbers over the course of a year, and then claiming that Arctic sea ice is recovering.
The source of the claim is this graph based on MASIE data, which is the subject of this blog post. I'll get to that later, but here's the 'recovery' graph:
I'm not even going to link to the blog in question, because it's full of misleading and embarrassing statements by an older gentleman whose mind has obviously been set in concrete a while ago, and this particular nonsense has been taken apart by Tamino back in September. Of course this hasn't discouraged the blogger in question to stop misleading his readers, and his latest production of the useless annual average nonsense* has, again, been taken up by the free market fundamentalist ex-banker hobby organization known as the (no) Global Warming Policy Foundation.
All of this wasn't all that interesting to me until I compared the 'recovery' graph with an annual average graph based on JAXA sea ice extent data (found here):Here the trend line goes down instead of up, 2012 is lower than 2007, and 2015 has the 4th lowest annual average instead of 6th. That's quite a difference. What could be causing it?
Now, the MASIE FAQ page has this: