[cogitator]

These two refrigerants were covered with a thin film of water to prevent evaporation and presented minimal flux losses.

So I would presume that one of the major industrial sources was foam-blowing? (Not to be confused with the more common public-relations activity known as smoke-blowing.)

[Old Professer]

R-12 for Styrofoam; BTW, the researcher I was talking to was a co-author of a Science magazine report that was tailor-made to look for HCl and HF and is one of strongest proponents of the PSCs.

I mentioned this conversation to Dr. Singer a couple of years later and he didn't know if the guy was serious or not; it was the detection of HF at altitude that brought Singer around a bit, but he asked me not to quote him.

It is important to remember that if indeed the PSCs are critical to the wholesale breakdown of ozone, then ordinary latitudes are not likely to be affected; of course, this of little comfort to those who have ensconced themselves in the affected zones.