How did we know the size of the hole in the ozone layer?

Question

How did we know the size of the hole in the ozone layer? Back when there was a hole in the ozone layer and everyone (who isn't retarded) was worried about it getting too big, how did scientists know how big it was? Were they able to take a UV picture of the atmosphere or what? Did anyone take a UV picture of the hole?

Answer 1

I have seen three photographs of the ozone layer each taken in the month of September,in 1979,1983, and 1991 in a newspaper,As per the newspaper, the data was provided by the " Total Ozone Mapping Spectrometer" aboard the NASA's Nimbus 7 aircraft.An almost circular hole is seen above the Antarctic in the data of Sep.,1991 almost covering the entire continent.In the other photographs,the hole is covering only a portion of the continent,the one taken in1979, showing the smallest hole.

Answer 2

First we do not understand it was once brought on through CFCs. We realize that it shrinks and grows certainly established on countless elements. Many faux to understand it was once brought on through CFCs, oddly almost all alarmists, however actually we do not realize. It has grown and gotten smaller repeatedly considering CFCs had been banned. We realize a few truly info however we're not sure of all of the motives and we're not sure the quantitative end result that our prior CFCs had or if halting construction had any measurable improvement.