1. A blue gaseous allotrope of oxygen, O3, formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation. It is an unstable, powerfully bleaching, poisonous oxidizing agent with a pungent, irritating odor, used to deodorize air, purify water, treat industrial wastes and as a bleach.
Excerpted from The American Heritage Dictionary of the English Language
I'm confuzed!
O3, formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation
So it's winter over the South Pole. Which means no sunlight is falling on the South Pole. Which means no ultraviolet light from sunlight to form ozone. OOOOOPS, that's too simple, must go back to the standard moonbat answer:
IT'S BUSH'S FAULT!