I've waited an extra week with this post because I was on a holiday and because the minimum is about to get hit. More on that below, but first a short discussion of the PIOMAS August data.
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center:
Just like last month, I had expected perhaps a larger drop. But whereas last month the volume loss was still above average, this month's isn't. The 2007-2017 average volume decrease for August is 2578 km3, and this year it was 2347 km3, more than 200 km3 lower. This means that 2018 is back in 6th position again, as the difference with lower years (except last year) has grown again.
Here's how the differences with previous years have evolved from last month:
On Wipneus' version of the PIOMAS graph we can see how the trend line made a slight drop towards the end of the month, veering away from 2013: