New Study Showing Ozone Recovery Hailed as Model for Tackling Climate Crisis

Hailed as an example of how concerted global action can help solve a planetary crisis, a new study conducted by NASA scientists documented the first direct evidence that an international effort to ban chlorofluorocarbons (CFCs) has led to the recovery of the Antarctic ozone hole.

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“We’ve stopped harmful pollutants before and nature has healed itself. Let’s cut carbon emissions now and allow nature to heal itself again.”
—GreenpeacePublished in the journal Geophysical Research Letters on Thursday, the study uses satellite observations to demonstrate that the decline in atmospheric chlorine that resulted from the implementation of the Montreal Protocol, enacted in 1989,has led to “about 20 percent less ozone depletion during the Antarctic winter than there was in 2005—the first year that measurements of chlorine and ozone during the Antarctic winter were made by NASA’s Aura satellite.”

“We see very clearly that chlorine from CFCs is going down in the ozone hole, and that less ozone depletion is occurring because of it,” Susan Strahan, an atmospheric scientist from NASA’s Goddard Space Flight Center and one of the study’s lead authors, said in a statement.

In a video published on NASA’s website on Thursday, Strahan explained the significance of the study and why the Montreal Protocol should be celebrated as a great success: