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Mystery Source Of Already Banned Ozone-Depleting Substance Discovered

The darker colors on the map represent the areas with highest carbon tetrachloride emissions. This reveals a concentration of the…

The darker colors on the map represent the areas with highest carbon tetrachloride emissions. This reveals a concentration of the already forbidden subject in east China. Lunt, Park, et al. )

The discovery of the core of the continued emissions of an already banned ozone depleting substance is finally discovered. Instead of reducing after the ban, emissions have also been shown to have increased in some regions.

Emission of ozone depleting substances

It was 201

0 that the carbon tetrachloride production was banned worldwide because of its destructive properties on the earth’s ozone layer that protect us from harmful ultraviolet radiation. However, new studies show that despite the ban, there are still around 40,000 tonnes of the substance emitted to the atmosphere each year.

The source of emissions was a mystery for researchers, so researchers from the University of Bristol, together with researchers from the United States, South Korea, Switzerland and Australia, collaborated to quantify East Asian emissions using both field-based and airborne atmospheric concentration data from 2010 to 2016.

Mystery Source Revealed

What researchers found where there are still significant significant emissions from east China which account for a large sum of the missing global estimates. In addition, carbon tetrachloride emissions from eastern Asia showed that they were significantly larger than previously thought.

In addition, they did not find any signs of emission reductions in the region since 2010. In fact, the data also show a slight increase in emissions from the region since 2010 and a new source of emissions from the Shandong province in China after 2012.

Hole in knowledge

Coauthor Dr. Matt Rigby states that while their research answers a big question, there are still gaps in knowledge that need to be addressed, such as the exact sectors that are responsible. In addition, it is still unknown if the emissions were intentionally or unintentionally produced, perhaps as a byproduct to produce other chemicals such as chlorine.

“Studies like this show the importance of continued monitoring of ozone depleting gases. There is a temptation to see ozone depletion as a problem that has been solved. However, the monitoring of artificial ozone depleting gases in the atmosphere is necessary to ensure continued success with the phasing out of these compounds , says lead author Dr. Mark Lunt at the University of Bristol.

The study is published in Geophysical Research Letters .

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