Image caption
Lowest detected ozone (top) and average temperature (bottom) in the stratosphere (7.5 to 13.7 miles, or 12-22 kilometers altitude) over the South Pole during the 2021 ozone hole season (September 24-October 15). Each column from left to right represents weather balloon data from a single year, starting in 1986-2021. Colder years tend to have the bigger ozone holes. Image by NOAA Climate.gov, based on Global Monitoring Lab data from Bryan Johnson.