Unlike last year the Arctic Sea Ice blog isn't going into full hibernation.
We are sleeping with one eye open...
There will be a new open thread at the start of every month to discuss the recent going-ons in the Arctic (ice, SSTs, weather, etc) and interesting news pertaining to it.
For instance, right now there's a lot ado about the big Arctic ozone hole we witnessed last winter/early spring because of a paper by Manney et al. that has just been published in Nature: Unprecedented Arctic ozone loss in 2011.
I remembered reading about this a few months back, but was reminded by this Alfred Wegener Instute press release (in German) that has a very good explanation of why it happened: extreme, prolonged cold in the stratosphere, causing the formation of clouds that allow CFCs to destroy ozone. A strong Polar Vortex kept all that cold in the Arctic, as is mentioned in this BBC article. Dr. Jeff Masters has an excellent Wunderblog post on this that explains exactly what happened and why it's so dangerous.
Some other recent bad news is that the AMSR-E sensor aboard the Aqua satellite has stopped producing data. I'm not sure what the consequences of this will be, but it doesn't look good.
It would be great if we could discuss these and other things here.