Arctic ozone loss at record level

[Samen]

Ozone loss over the Arctic this year was so severe that for the first time it could be called an "ozone hole" like the Antarctic one, scientists report.

http://www.bbc.co.uk/news/science-environment-15105747

[Toner]

The cause was an unusually long spell of cold weather at altitude.

Damn you Al Gore! What have you done?

[lilly]

One of my kids is an evolutionary biologist among other things. I think he is involved in investigating this sort of thing. Was sent to Alaska to check things out there. He is brilliant and works with the best and brightest out there.

[BuilderBob]

As I understand it ozone needs sunlight to be created, UV is the driver, yet there are many reports that UV levels are down and and a cold winter is forecast. Also this being the NH winter there is NO sunlight at the north pole right now.

Wikipedia has some interesting information:

Ozone is a powerful oxidizing agent, far stronger than O2. It is also unstable at high concentrations, decaying to ordinary diatomic oxygen (with a half-life of about half an hour in atmospheric conditions):[11]

Have a look at some data at the Dobson Sites map. Click on a red dot.

I found the difference in annual ozone levels between Barrow and Mauna Loa quite surprising.