October 4, 2023
By Julia Jacobo

Ozone hole over Antarctica grows to one of the largest on record, scientists say

ABC News Live Measurements from the Copernicus Sentinel-5P satellite show this year’s ozone hole over the Antarctic.

The annual ozone hole that forms over Antarctica has ballooned to near-record size, scientists say.

Measurements from satellite imaging taken on Sept. 16 showed that the ozone depletion area had reached 26 million square kilometers -- roughly three times the size of Brazil, according to Copernicus, the European Union's Earth observation program.

Every year, an ozone hole forms over the Antarctic due to the presence of ozone-depleting substances in the stratosphere and the specific conditions of the region, according to Copernicus.

The annual ozone hole that forms over Antarctica has ballooned to near-record size, scientists say.

Measurements from satellite imaging taken on Sept. 16 showed that the ozone depletion area had reached 26 million square kilometers -- roughly three times the size of Brazil, according to Copernicus, the European Union's Earth observation program.

Every year, an ozone hole forms over the Antarctic due to the presence of ozone-depleting substances in the stratosphere and the specific conditions of the region, according to Copernicus.

An iceberg floats near Two Hummock Island, Antarctica, February 2, 2020. Ueslei Marcelino/Reuters, FILE

Ozone levels usually return to normal by mid-December, after temperatures high up in the stratosphere rise in the southern hemisphere, slowing the ozone depletion and weakening the polar vortex, according to Copernicus.

A report released by the United Nations Environment Programme in January found that the ozone layer was on track to recover within decades.

There is some speculation that the unusual behavior of the ozone layer in 2023 is a result of the Tongan underwater volcano eruption in January 2022.

The immense amount of water vapor that was injected into the atmosphere likely just started reaching the south polar region after the end of the 2022 ozone hole, Antje said.

The impact of the widespread use of damaging chlorofluorocarbons in products such as refrigerators and aerosol tins in the 1970s and 1980s led to the depletion of the ozone high in the atmosphere, allowing for the ozone layer above Antarctica to open up, according to Copernicus.

Measurements from the Copernicus Sentinel-5P satellite show this year’s ozone hole over the Antarctic. Copernicus Sentinel/ESA
 

Last month, the U.S. Environmental Protection Agency delayed plans to tighten ozone pollution standards until after the 2024 presidential election.

ABC News' Meredith Deliso and Gina Sunseri contributed to this report.