Atypical weather conditions caused Antarctic ozone hole to expand in 2026

Atypical weather conditions caused the Antarctic ozone hole to grow to an unusually large size in 2026, NOAA and NASA scientists reported. Phys.org and the University of Colorado Boulder both reported that government researchers released their seasonal measurements tracking the atmospheric phenomenon. [1][4]

The 2026 ozone hole became the seventh-largest observed in 48 years of monitoring, according to Phys.org, based on a seasonal mean area analysis conducted by NOAA and NASA. The expansion was fueled by a powerful polar vortex, which is a large area of low pressure and cold air surrounding Earth's poles. [1]

The University of Colorado Boulder reported that NOAA and NASA ranked the 2026 ozone hole among the ten largest on record. NASA conducts research studying Earth and space environments, while NOAA monitors oceanic and atmospheric conditions. [4][5]

Despite the large seasonal size recorded in 2026, NOAA and NASA scientists said that the protective atmospheric ozone layer remains on track to recover by later this century, Phys.org reported. [1]