From: "Mike Ledbetter" <answer3@passport.ivv.nasa.gov>
Subject: Re: Why is the hole in the ozone over Antarctica and not over a major city?
Date: Tue, 28 Apr 1998 13:18:43 -0400

-----Original Message-----
From: onair@passport.ivv.nasa.gov <onair@passport.ivv.nasa.gov>
Date: Tuesday, April 28, 1998 12:12 PM
Subject: Why is the hole in the ozone over Antarctica and not over a major
city?


>Matthew L. asks this Question:
>
>Why is the hole in the ozone over Antarctica and not over a major city?
>
>
>Answer:
>
>Mathew:

The ozone is destroyed by the cold atmospheric temperatures over Antarctica.
Also the atmospheric circulation causes the poles to accumulate the
atmospheric polutants. The combination of these factors does not occur over
any major cities in the Southern Hemisphere.  The growing ozone hole over
the Arctic, however, may result in an ozone hole over major cities in the
Northern Hemisphere.