File name: ozone_concentration_20221005_final.jpg Original Resolution: 1400 × 1088 File Size: 313 KB (MIME Type: image/jpeg) Date Published: October 26, 2022 Download file View image caption The ozone hole—defined as the area in which ozone concentrations are below 220 Dobson units—over Antarctica on October 5, 2022. NOAA Climate.gov image, based on TOAST data.