Irina Petropadlovskikh

And they noticed that flying into Antarctica, the ozone started to go down and chlorine started to go up.

And so that made very good sense to them so that those chemicals are destroying ozone.

Yeah.

chemicals that we can use in refrigeration.

Those chemicals were put in the firefighting equipment, for example.

They were very effective at that.

They were put in the aerosols, sprays.

And so they've been used for fumigation of the vegetables and the fruits.

So they were working really well.

But what I think people did not realize right away is that those chemicals actually are capable of escaping into the stratosphere.

Well, the atmosphere has these mixing properties.

You know, there are a lot of exchange between the troposphere and stratosphere and the tropics.

Oh.

And they can travel also with this flow of the air from the tropics into the middle latitudes in the polar region.

There is the so-called Brewer-Dobson circulation in the atmosphere.

And they get distributed everywhere.

And then they can hang out for a long time, yes.

Oh, there's another thing that we need to remember.

There is also the specific clouds that are formed in Antarctica, and they're called the polar stratospheric clouds.

Polar stratospheric clouds.