Ozone layer recovering at 1 to 3 per cent per decade

Share
Ozone layer recovering at 1 to 3 per cent per decade

The ozone layer is expected to make a full recovery within 50 years, according to a United Nations report.

The ozone layer absorbs about 98% of harmful cancer-causing UV light - so it is vitally important. Levels were found to be reduced in the 1980s, caused by chlorofluorocarbons (CFCs) and halons, gases used in spray cans, fridges and insulation.

The research was part of a four-yearly review of the Montreal Protocol, a 1987 ban on man-made gases that harm the ozone layer, which found that these gases in the atmosphere were decreasing in the long-term.

It is possible the healing of the ozone hole above Antarctica may insulate the continent and accelerate climate warming, but report co-author Ross Salawitch, an atmospheric scientist at the University of MI, said the immediate effects of ozone damage were such that it would be "incredibly irresponsible" not to protect the depleted ozone layer.

The report stated: "The Antarctic ozone hole is recovering while continuing to occur every year".

Paul Newman of Nasa, joint chairman of... The Kigali Amendment to the Protocol, made in 2016, deals with phasing down the use of other substances like HFCs which are not ozone-depleting but are quite damaging for the climate due to its high global warming potential.

Referring to projected rates, the report says the northern hemisphere and mid-latitude ozone is "scheduled to heal completely by the 2030s followed by the southern hemisphere in the 2050s and polar regions by 2060". "We stopped that", Paul Newman, a NASA scientist and co-chairman of the new United Nations report, told the AP. "If ozone-depleting substances had continued to increase, we would have seen huge effects".

But the report, from the UN's environment and world meteorological organisation, said there is evidence of an unexpected increase in CFC-11 from eastern Asia since 2012.

"It shows that the ozone layer is under fix, and highlights areas that must be strengthened for it to be an equally successful platform to phase out HFCs to limit global warming", said Shikha Bhasin, programme lead, Council on Energy, Environment and Water (CEEW). It's unclear, however, how much more warming can be expected once the Antarctic ozone hole heals.

"The Montreal protocol is one of the most successful multilateral agreements in history for a reason", said Erik Solheim, head of UN Environment. Since 2000, it has increased by about 1 to 3 percent per decade, the report said.

But an amendment to the Montreal Protocol is set to come into place next year which will ban the chemical.

"I don't think we can do a victory lap until 2060", Newman said.

Share

Advertisement

Related Posts

Booms and Busts in Internet of Things (IoT) Security Market
Drivers and restraints looks at the external factors supporting and controlling the growth of the market . Analyzing viewpoint of the market with the on-going trends and Porter's five forces analysis.

World Update, 'Morning people' have lower breast cancer risk
The scientists found that those with an in-built morning preference were 40% to 48% less at risk of breast cancer . About 5 per cent of women with breast cancer have inherited a gene linked to the condition.

Uganda begins Ebola vaccination for high-risk health workers
The infection is capable of killing 20 to 70 percent of those who are infected depending on the strain of virus. Ebola first appeared in 1976 in Sudan and Congo, and gets its name from a river in the latter nation.

Democrats ready to investigate Trump's foreign policy
Numerous issues already have been put forward by Representative Eliot Engel, the top Democrat on the Foreign Affairs Committee. Meanwhile, key state-level wins will give Democrats the chance to redraw districts and undo gerrymandering.

Some California Bar Shooting Survivors Also Survived Las Vegas Massacre, Witness Says
Late Wednesday evening, 12 people were killed in the attack at Borderline Bar and Grill in California. He said he and others smashed their way out of the bar onto a balcony and then jumped down to safety.

Danny Welbeck Suffers A Truly Horrific Ankle Injury In Europa League
We'll have to wait for updates from Unai Emery after the game but let's pray it's not as serious as it seemed on TV. He helps us with his quality and capacity. "That's why we loaned him in the first place", he said.

[H]ardOCP: Google Chrome 71 to Block More Intrusive Advertising
Websites showing "abusive advertisements" will soon face the wrath of Google Chrome as it will be blacklisting them for it. With this landmark, the company has also announced policies to subdue abusive ads with renewed vigor.

Protesters Across US Warn Trump Against Derailing Mueller Probe
Matt Whitaker has taken over as acting-attorney general. "He worships him", a longtime friend said of Whitaker and Trump. In the months before, Whitaker was a familiar presence on CNN, where he questioned Mueller's scope and reach.

Watch Ariana Grande’s First Performance of "thank u, next"
Ariana Grande released " thank u, next " out of nowhere recently. "We were supposed to come down?" "Yeah, you left me!" Grande teased the upcoming performance on her Instagram, sharing behind-the-scenes photos and even a short clip.

Fossil's latest Wear OS smartwatch adds longer battery life for $255
Beyond the new chip, the Fossil Sport will come preloaded with the updated Wear OS , Google's smartwatch operating system. The watch is stepping up fitness tracking with the new version of Google Fit, GPS and activity tracking.

© 2015 ExpressNewsline. All Rights reserved.