A strong polar vortex supported the formation of a large and deep Antarctic ozone hole in September 2020 that should persist into November, NOAA and NASA scientists reported today.
Early development of the ozone hole was moderated by active weather that mixed in ozone-rich air from lower latitudes.
But the Montreal Protocol is working: the hole in our planet’s UV-blocking ozone layer was smaller than those of the 1990s and 2000s.