Just when you thought you knew it all, someone shows up with something new. That someone is Bob Wallace commenting in the latest post on CT SIA long-term regional graphs. And that something is this website showing the age of Arctic sea ice: Arctic Ice Age.
This website has animations for each month of the past 28 years, based on data provided by James Maslanik and Chuck Fowler, which are also used for the NSIDC March and September analyses of ice age distribution. It's a great tool to compare ice age distributions from year to year, and it even has an animation showing the weekly development of the 'ice year' since the start of the freezing season up to present. The only minor quibble is that this animation is still showing the freezing season starting in 2010.
But I'm definitely not complaining. Just like the CT SIA long-term regional graphs, this is the kind of info that makes it visually crystal clear to even the layest of lay persons what is going on in the Arctic. Thank you for putting this out there.