Record Ozone Hole Over the Arctic Has Closed
An unusual phenomenon happened in March and April when an enormous hole in the ozone layer formed over the Arctic. Last week, though, scientists tracking the hole noticed that it has closed, as CNN reported.
Unlike the infamous hole in the ozone over Antarctica, which was caused by overuse of now illegal chemicals containing chlorofluorocarbons, the hole in the Arctic was caused by a combination of factors, including low Arctic temperatures, sunlight, pollutants and a particularly strong polar vortex, according to the Copernicus' Atmospheric Monitoring Service (CAMS), as CNN reported.
The unprecedented 2020 northern hemisphere #OzoneHole has come to an end. The #PolarVortex split, allowing #ozone-r… https://t.co/UGQvQwSU0D— Copernicus ECMWF (@Copernicus ECMWF)1587638550.0
"These two are really different animals," said Paul Newman, the chief scientist in the Earth Sciences Division at NASA's Goddard Space Flight Center, as Mashable reported. "This [Arctic ozone hole] is not comparable to the Antarctic ozone hole. If this was happening over the Antarctic we would be shouting for joy."
The hole over Antarctica opens up every year from August until October. However, it has improved dramatically since ozone-depleting chlorofluorocarbons were banned in the 1994 Montreal Protocol. Last year, the Antarctic ozone hole was at its smallest since it was first discovered, as CNN reported.
While the COVID-19 lockdowns have improved air quality around the world and helped wildlife, the drops in pollution did not cause the ozone hole to close up.
"COVID19 and the associated lockdowns probably had nothing to do with this," CAMS said on Twitter. "It's been driven by an unusually strong and long-lived polar vortex, and isn't related to air quality changes."
The hole in the ozone above the Arctic started in March when unusual conditions trapped cold air over the North Pole for several weeks in a row. That triggered a circle of cold air, known as a polar vortex, which led to clouds high in the atmosphere. Those clouds interacted with pollutants from human emissions and depleted the ozone gases above the Arctic. The hole it opened up was roughly three times the size of Greenland.
The ozone layer, which sits between 9 and 22 miles from the earth's surface, shields the planet from the sun's damaging ultraviolet radiation. The hole above the Arctic would have only posed a threat to humans if it had traveled or expanded farther south, as Euronews reported.
"It's unusual but not unexpected," said Newman, of the recent Arctic ozone hole, to Mashable. "It's unusual in that we only have events like this about once per decade."
In 1997 and 2011, there were similar ozone depletions of the Arctic, according to Antje Innes, a senior scientist at the European Union's Copernicus Atmosphere Monitoring Service, who spoke to Mashable. However, the extent of ozone depletion was far greater during this one.
Scientists insist it is too early and too rare to say if the recent ozone depletion portends a new trend. "From my point of view, this is the first time you can speak about a real ozone hole in the Arctic," said Martin Dameris, an atmospheric scientist at the German Aerospace Center, to Nature.
- Saving the Ozone Layer 30 Years Ago Slowed Global Warming ... ›
- Ozone-Depleting Substances May Have Driven Arctic Warming ... ›
- Record Ozone Hole Forms Over Arctic - EcoWatch ›
- 'Ozone Friendly' Chemicals Are Polluting the Environment - EcoWatch ›
The Environmental Protection Agency (EPA) approved the use of products containing the weedkiller dicamba for use on cotton and soybeans Tuesday. The EPA announcement means that two products that contain the herbicide found to cause cancer can be registered for five years. It also extended the use of a third product that also has dicamba in it, according to The Hill.
- West Texas Vineyards Hit by Herbicide Drift - EcoWatch ›
- Trump's EPA Sides With Monsanto, Extends Dicamba 2 More Years ›
EcoWatch Daily Newsletter
As U.S. Election Nears, Polling Shows 82 Percent of Voters Support 100 Percent Clean Energy Transition
By Jessica Corbett
With an estimated 66 million ballots already cast and only a week to go until Election Day, new polling released Tuesday shows the vast majority of U.S. voters believe the nation should be prioritizing a transition to 100% clean energy and support legislation to decarbonize the economy over the next few decades.
<div id="5206f" class="rm-shortcode" data-rm-shortcode-id="584d1641628f692ff103aee7ed74b45e"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1321080152328208384" data-partner="rebelmouse"><div style="margin:1em 0">Biden should get "uncontrolled climate change would cost $486 trillion" tattooed on his forehead imo https://t.co/nTbVdHa9gD</div> — Emily Atkin (@Emily Atkin)<a href="https://twitter.com/emorwee/statuses/1321080152328208384">1603805027.0</a></blockquote></div>
Arctic Ocean sediments are full of frozen gases known as hydrates, and scientists have long been concerned about what will happen when and if the climate crisis induces them to thaw. That is because one of them is methane, a greenhouse gas that has 80 times the warming impact of carbon dioxide over a 20 year period. In fact, the U.S. Geological Survey has listed Arctic hydrate destabilization as one of the four most serious triggers for even more rapid climate change.
Are you noticing your shirts becoming too tight fitting to wear? Have you been regularly visiting a gym, yet it seems like your effort is not enough? It's okay to get disappointed, but not to lose hope.
Typhoon Molave is expected to make landfall in Vietnam on Wednesday with 90 mph winds and heavy rainfall that could lead to flooding and landslides, according to the U.S. Embassy and U.S. Consulate in Ho Chi Minh City. To prepare for the powerful storm that already tore through the Philippines, Vietnam is making plans to evacuate nearly 1.3 million people along the central coast, as Reuters reported.