>>12488032>>This year brought the 12th-largest ozone hole (by area) in 40 years of satellite records, with the 14th-lowest ozone readings in 33 years of balloon-borne instrumental measurements.The chlorine content of the stratosphere is still elevated far above the levels that they were prior to the first ozone hole recorded in 1980 (reported by Fatman et al., Nature (1984)). Pic related shows how it won't be until the 2060s or so until the amount of chlorine declines to pre-ozone hole levels. We expect to see ozone holes of varying extent until that date.
>Turns out ozone holes are natural occuring phenomena dependent on weather Ozone holes occur when polar stratospheric clouds form (t < 195 K). These clouds catalyze the transformation of HCl and ClONO2 into Cl2, which photolyzes in the polar spring and reacts with ozone. There are two ingredients here: (1) chemistry and (2) weather. You need both to cause a hole. Sometimes the polar vortex is disrupted by sudden stratospheric warming events, as in antarctica 2019, leading to very weak ozone holes. Sometimes the polar vortex is strengthened by anomalous weather, as in the unprecedented 2020 arctic ozone hole.
Weather is what causes variation in ozone hole extent. The supply of halogens causes the hole itself to form, and these are only very slowly declining (pic related).
>and we banned cheap, nontoxic and efficient refrigation gases for no reason except for the massive benefit of multinational industry giants who could sell their magnitudes more expensive patent gases instead.CFCs and halons are extraordinarily potent greenhouse gases in addition to being incredibly destructive to the ozone layer. If the 1989 Montreal protocol and subsequent amendments had not been implemented, there would be no ozone layer over even the tropics today.
>Ladies and gentlemen and stockholders, I present you the useful idiot green movement in a nutshell.Dunning-Kruger in effect, everyone
