Ozone Hole over Antarctica (IMAGE) Columbia Climate School Caption The largest ozone hole over Antarctica (in purple) was recorded in September 2006. Thanks to the Montreal Protocol, the amount of ozone-depleting chemicals in the atmosphere peaked in the late 1990s and Antarctica's ozone hole is expected to recover by 2060. Credit NASA. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.