A dangerous ozone depleting compound is still used in China, despite being banned worldwide by the Montreal Protocol, finding a…
A dangerous ozone depleting compound is still used in China, despite being banned worldwide by the Montreal Protocol, finding a new study.
East China has emitted significant amounts of this substance – known as carbon tetrachloride (CCl4) – known to eat at the ozone, a protective layer in the earth’s atmosphere that protects the world from dangerous ultraviolet radiation.
The new research is yet another proof of pointing to China as ozone source -destroying emissions. Last summer, a survey of The New York Times also found that the factories in the country released prohibited substances that destroyed the ozone layer. [Earth from Above: 1
01 Stunning Images from Orbit]
The ozone is high in the Earth’s stratosphere, about 10.2 kilometers above the ground, where it absorbs much of the sun’s ultraviolet (UV) radiation. This radiation increases the risk of cancer and eye damage in humans. A human-made hole already exists in the ozone layer over Antarctica. So to protect the ozone, all countries in the world collectively agreed to ban substances that destroy the layer, including CCl4, which was curse all over the world in an update of the Montreal Protocol 2010. Despite this agreement, some 44,000 tonnes (40,000 tonnes) were released mysteriously every year, recent studies have shown.
To investigate, an international team of researchers from Australia, South Korea, Switzerland, the United Kingdom and the United States collaborated to determine the origin of these puzzling emissions. The team used data from ground-based and airborne atmospheric sensors from close to the peninsula of Korea, as well as two models that simulated how gases move through the atmosphere.
These techniques were given by; The researchers found that about half of these mystifying emissions came from east China between 2009 and 2016.
“Our results show that carbon tetrachloride emissions from eastern Asia are responsible for a large proportion of global emissions” Lunt, a visiting research associated with chemistry at the University of Bristol in England, said in a statement. “And [these emissions] is significantly bigger than any previous studies have suggested.”
The CCl4 emissions are so big that despite the phase-out of carbon discharges for emissions utilization in 2010 we found no evidence of a subsequent reduction of emissions, Säger Lunt. Some regions, including the Shandong Province China after 2012, have even pumped more emissions he said.
The researchers noted, however, that they are not uncertain where the other CCl4 emissions come from. It is possible that large amounts of this gas will be accidentally created when other chemicals, such as chlorine, are produced, the researchers said. 19659002] “Our work shows the location of carbon tetrachloride emissions,” co-author Matt Rigby, an atmospheric chemistry lecturer at the University of Bristol, said in the statement. “However, we do not know the processes or industries that are responsible. This is important because we do not know whether it is intentionally or unintentionally produced. “
More atmospheric research could reveal other sins.” There are areas in the world – such as India, South America and other parts of Asia – where emissions of ozone depleting gases can continue, but detailed atmospheric measurements are missing, “says Rigby.
Forward, these results can help researchers and regulators to identify exactly where and why these emissions occur in China. After all, the higher the emissions, the faster the ozone will recover said the researchers.
“There is a temptation to see ozone thinning as a problem that has been solved,” said Lunt. “However, monitoring of artificial ozone depleting gases in the atmosphere is crucial to ensuring continued success of the phase exchange of these compounds.”
The study was published on 28 September in the journal Geophysical Research Letters.  Urspring unveiled on Live Science.