Quantcast

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

Climate

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.

EcoWatch Daily Newsletter

Scanning electron micrograph of Yersinia pestis, which causes bubonic plague, on proventricular spines of a Xenopsylla cheopis flea. NIAID / Flickr / CC BY 2.0

A middle-aged married couple in China was diagnosed with pneumonic plague, a highly infectious disease similar to bubonic plague, which ravaged Europe in the middle ages, as CNN reported.

Read More Show Less
Milk made from almonds, oats and coconut are among the healthiest alternatives to cow's milk. triocean / iStock / Getty Images Plus

Dairy aisles have exploded with milk and milk alternative options over the past few years, and choosing the healthiest milk isn't just about the fat content.

Whether you're looking beyond cow's milk for health reasons or dietary preferences or simply want to experiment with different options, you may wonder which type of milk is healthiest for you.

Read More Show Less
Sponsored
Greta Thunberg stands aboard the catamaran La Vagabonde as she sets sail to Europe in Hampton, Virginia, on Nov. 13. NICHOLAS KAMM / AFP via Getty Images

Greta Thunberg, the teenage climate activist whose weekly school strikes have spurred global demonstrations, has cut short her tour of the Americas and set sail for Europe to attend COP25 in Madrid next month, as The New York Times reported.

Read More Show Less
The Lake Delhi Dam in Iowa failed in 2010. VCU Capital News Service / Josh deBerge / FEMA

At least 1,688 dams across the U.S. are in such a hazardous condition that, if they fail, could force life-threatening floods on nearby homes, businesses, infrastructure or entire communities, according to an in-depth analysis of public records conducted by the the Associated Press.

Read More Show Less

By Sabrina Kessler

Far-reaching allegations about how a climate-sinning American multinational could shamelessly lie to the public about its wrongdoing mobilized a small group of New York students on a cold November morning. They stood in front of New York's Supreme Court last week to follow the unprecedented lawsuit against ExxonMobil.

Read More Show Less
Sponsored

By Alex Robinson

Leah Garcés used to hate poultry farmers.

The animal rights activist, who opposes factory farming, had an adversarial relationship with chicken farmers until around five years ago, when she sat down to listen to one. She met a poultry farmer called Craig Watts in rural North Carolina and learned that the problems stemming from factory farming extended beyond animal cruelty.

Read More Show Less
People navigate snow-covered sidewalks in the Humboldt Park neighborhood on Nov. 11 in Chicago. Scott Olson / Getty Images

Temperatures plunged rapidly across the U.S. this week and around 70 percent of the population is expected to experience temperatures around freezing Wednesday.

Read More Show Less
A general view of the flooded St. Mark's Square after an exceptional overnight "Alta Acqua" high tide water level, on Nov. 13 in Venice. MARCO BERTORELLO / AFP / Getty Images

Two people have died as Venice has been inundated by the worst flooding it has seen in more than 50 years, The Guardian reported Wednesday.

Read More Show Less