No I don't mean totally, every few things do stuff totally
by filter I mean there is less UV the farther down in the atmosphere because UV and Ozone do what they do. Weither the UV is dispersed, expended, difused what ever. Sounds like Nature (for a lack of a better term) has a redundant system of creating Ozone. The first one is in the upper atmosphere were it is destroyed and created, then in the lower atmosphere where if the Ozone in the upper atmosphere lets to much UV through for what ever reason, UV creates Ozone out of just plain ole regular O2, how be it at a slower pace.
You wrote that the pace that UV destroyes O3 is fast, and that the rate O2 bonds with O is also fast, what's the ratio or relative speeds? ie: UV takes 2 minutes to destroy, O2 & O take 3 minutes to create.
What about the rate at which CFC's destroy Ozone?
The O2 that CI creates in the upper atmosphere, that would be broken down by UV into 2 O atoms letting them Bind to O2 that haven't been broken down yet Right?
Or does the O2 drop into the lower atmosphere before it gets broken down into 2 O atoms?
What are those rates?
Would more (higher levels) UV speed up breaking O2 down into 2 O Atoms?