Quantcast

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

By Jake Johnson

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.


Published 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 (above) 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.

While CFCs and other ozone-depleting substances were phased out by the mid-1990s, the study notes that the Antarctic ozone hole—which was first discovered in 1985—"is healing slowly" because the man-made substances that caused the hole in the first place "have long lifetimes."

Given that fact, researchers believe that it could be several decades before the ozone hole is eliminated altogether.

"CFCs have lifetimes from 50 to 100 years, so they linger in the atmosphere for a very long time," noted Anne Douglass, an atmospheric scientist at Goddard's Space Flight Center and one of the study's co-authors. "As far as the ozone hole being gone, we're looking at 2060 or 2080. And even then there might still be a small hole."

Responding to the study's results on Twitter, Greenpeace called for the success of Montreal Protocol to be used as a model for tackling the climate crisis.

"We've stopped harmful pollutants before and nature has healed itself," the group observed. "Let's cut carbon emissions now and allow nature to heal itself again."

Reposted with permission from our media associate Common Dreams.

Sponsored
IKEA is working on a specially-designed, air-purifying curtain called the GUNRID. IKEA

Air pollution within the home causes 3.8 million deaths a year, according to the World Health Organization. A recent University of Colorado in Boulder study reported by The Guardian found that cooking a full Thanksgiving meal could raise levels of particulate matter 2.5 in the house higher than the levels averaged in New Delhi, the world's sixth most polluted city.

But soon, you will be able to shop for a solution in the same place you buy your budget roasting pans. IKEA is working on a specially-designed, air-purifying curtain called the GUNRID.

Read More Show Less
The first member of the giant tortoise species Chelonoidis phantasticus to be seen in more than 100 years. RODRIGO BUENDIA / AFP / Getty Images

A rare species of giant tortoise, feared extinct for more than 100 years, was sighted on the Galápagos island of Fernandina Sunday, the Ecuadorian government announced.

Read More Show Less
Sponsored
Elena Pueyo / Moment / Getty Images

By Adda Bjarnadottir, MS

Opinions on coffee vary greatly—some consider it healthy and energizing, while others claim it's addictive and harmful.

Read More Show Less
Morning fog over a boreal forest in Alaska. Alan Majchrowicz / Stockbyte / Getty Images

By Jennifer Skene and Shelley Vinyard

For most people, toilet paper only becomes an issue when it unexpectedly runs out. Otherwise, it's cheap and it's convenient, something we don't need to think twice about. But toilet paper's ubiquity and low sticker price belie a much, much higher cost: it is taking a dramatic and irreversible toll on the Canadian boreal forest, and our global climate. As a new report from NRDC and Stand.earth outlines, when you flush that toilet paper, chances are you are flushing away part of a majestic, old-growth tree ripped from the ground, and destined for the drain. This is why NRDC is calling on Procter & Gamble, the manufacturer of Charmin, to end this wasteful and destructive practice by changing the way it makes its toilet paper through solutions that other companies have already embraced.

Read More Show Less
Cycling advocates set up "ghost bikes," like this one in Brooklyn, in memory of bikers killed in traffic. Nick Gray / CC BY-SA

By John Rennie Short

As cities strive to improve the quality of life for their residents, many are working to promote walking and biking. Such policies make sense, since they can, in the long run, lead to less traffic, cleaner air and healthier people. But the results aren't all positive, especially in the short to medium term.

Read More Show Less