Another month has passed, but this time there is more than just a data update. It seems the whole PIOMAS version 2.0 has been upgraded to 2.1. As it says on the Polar Science Center website:
We identified a programming error in a routine that interpolates ice concentration data prior to assimilation. The error only affected data from 2010-2013. These data have been reprocessed and are now available as version 2.1. Ice thickness is generally greater in the Beaufort Chukchi Sea area with the largest differences in thickness during May. Differences in ice volume are up to 11% greater in late spring.
Chris Reynolds has a blog post up on the Dosbat blog that explains the details and what they mean:
[T]he version change impacts overall volume very little. Note that all the following graphs are plotted using the full dataset from 1979 to 2013.
Wipneus has another interesting tidbit on the Arctic Sea Ice Forum:
[A]s a result of the version bump the trends have changed only slightly, especially when taking uncertainty into account. The exponential extrapolation to exactly zero, which was affected most, shifted upward 0.5 years (2016.44 to 2016.94).
With that out of the way we now proceed to the monthly PIOMAS update: