Quote Originally Posted by DuncanONeil View Post
The city is wide spread but the sensors are located not throughout the city but only in places known to create a high ozone count, and yes I mean O3. This issue is closely related to AGW.
As I said, when measuring the ozone levels of pollution, that's the best place to put your sensors. Those places would be the first to show a change, either up or down, and would give you time to put out a warning. But again, these are fairly localized phenomena, more pronounced in cities with large numbers of internal combustion engines. This ozone tends to stay close to the ground and accumulate in low spots. And ozone is highly reactive, so it will "degrade" fairly quickly, especially when spread around by winds. The ozone located in the ozone layer around the planet, while chemically identical, is formed by different processes and actually performs a beneficial function. That ozone never reaches the ground, though, so I don't see how these "ozone days" that we hear about would be of any value to AGW proponents.