I think you're working too hard on your theory.
Ozone is an unstable form of oxygen that breaks down if you look at it sideways. If new ozone was not being constantly created by solar input, the "ozone layer" would be gone in a very short time.
At the poles, the sun goes away every winter (or summer, depending on the pole). No sun, no ozone. Sun comes back, so does the ozone.
The actual situation is more complicated, of course, but that's probably pretty much it. When the sun doesn't come up in Antarctica for a few months over the summer, the ozone decays.