See The Most Dazzling Photos Of January's Super Blood Wolf Moon
Scientists: Saturn spent billions of years without its rings
"Blood moon" visible in Saint Lucia this weekend
Total lunar eclipse: Super Wolf Blood Moon visible in the Netherlands
Seeds taken to Moon by China's Chang'e-4 mission have sprouted
Banned ozone-destroying chemical makes a mysterious resurgence
17 May 2018, 06:41 | Dale Webster
Banned Ozone-Harming Gas Creeps Back, Suggesting a Mystery Source
"This is the most surprising and unexpected thing that I've observed in 27 years of making these measurements", said Steve Montzka, a research chemist at NOAA and lead author of the paper. "I was astounded by it really".
When a hole in the ozone formed over Antarctica, countries around the world in 1987 agreed to phase out several types of ozone-depleting chemicals called chlorofluorocarbons. The startling resurgence of the chemical, reported in Nature, will likely spark an global investigation to track down the mysterious source.
However, a study recently published in Nature reveals that CFC-11 production may be happening somewhere in the world despite the Montreal Protocol.
"It's worrisome that someone's cheating", he said.
Measurements at remote sites - including the government-run Mauna Loa Observatory in Hawaii - of the chemical, known as CFC-11, point to East Asia as the source or renewed production.
Zaelke said he was surprised by the findings, not just because the chemical has always been banned, but also because alternatives already exist, making it hard to imagine what the market for CFC-11 today would be.
Plus, it isn't just CFC-11 that was found to be increasing.
The slowdown in reduction of CFC-11 also has implications for the fight against climate change. It is thought that about 13,000 tonnes a year has been released since 2013.
The standard reference for CFC concentrations, the United Nations Environment Program's Handbook for the Montreal Protocol, reported in its 2012 edition that production of CFC-11 was very close to zero.
Aerosols were a common source of CFCs through the 1990s
CFCs and other molecules have mainly eroded ozone in the upper stratosphere, and over the poles. That loss of ozone, in turn, weakens our protection from UV radiation at the Earth's surface.
That has led scientists to predict that by mid- to late-century, the abundance of ozone-depleting gases would to fall to levels last seen before the Antarctic ozone hole began to appear in the early 1980s.
"This evidence strongly suggests increased CFC-11 emissions from eastern Asia after 2012".
Two years after the discovery of the hole in the ozone layer above the Antarctic in 1985, the Montreal Protocol was signed, an worldwide treaty which introduced restrictions on the production of CFCs.
Watson suggested that aircraft flights might be necessary to better identify the source of the emissions.
"If these emissions continue unabated, they have the potential to slow down the recovery of the ozone layer", Weller said in a statement.
"A timely recovery of the stratospheric ozone layer depends on a sustained decline of CFC-11 concentrations", the wrote.
"They're going to find the culprits. That's a tough group of people". If not remedied soon, however, substantial delays in ozone layer recovery could be expected.
But in 2012 scientists noted that the rate of decline had slowed by 50 per cent, according to the new study.
WWE SmackDown Live Reportedly Heading To A New Network
According to the report, NBCUniversal is said to be close to renewing the deal for RAW at three times its current value. At the time, US aired five hours of live WWE programming a week; WWE programming now airs two nights a week on USA.
Jameela Jamil calls Kardashian "toxic" over diet ad
It's not clear what Kim was paid for the post, although in 2016, she was reportedly pulling in $400,000 per sponsored ad. Bean holding up the middle finger. "This family makes me feel actual despair over what women are reduced to".
Siblings clash at the box office
So basically, now it is a clash between siblings, Harshvardhan Kapoor will clash with his elder sister Sonam Kapoor. The clash could mean a lot of damage in terms of distribution and box office collection for both parties.
Egypt bank on Salah's Liverpool form at World Cup
Mohamed Salah headlines Egypt's 29-man preliminary World Cup squad ahead of their friendlies against Kuwait and Belgium. However, the record African Cup of Nations winners, Egypt, are set to enter the tournament with a far more risky team.
French Oil Firm May Leave Iran
Joe Kaeser, the CEO of Germany's Siemens ( SIEGn.DE ), told CNN his company would not be able to do any new business with Tehran. Total owns 50 percent of the project with a Chinese company owning a 30 percent stake.