NASA Reports 2026 Ozone Hole Reaches Seventh Largest Extent in 48 Years
The Antarctic ozone hole reached its annual maximum extent on September 18, 2026, marking it as the seventh largest in 48 years of monitoring. Scientists define the ozone hole as the area where ozone concentrations fall below 220 Dobson Units. While the 2026 hole was extensive in area, it was not as deep as some other large holes on record. This significant size is attributed to an unusually strong Antarctic polar vortex, which created optimal conditions for ozone depletion. The stratospheric ozone layer is crucial for protecting life on Earth by absorbing harmful ultraviolet light, which can damage DNA and cause skin cancer. The phenomenon of the ozone hole, first observed dramatically in 1985, is primarily caused by chlorofluorocarbons (CFCs) and human-produced bromine compounds, which release reactive chlorine atoms that destroy ozone in the stratosphere.
