[ad_1]
The compound, carbon tetrachloride, contributes to the destruction of the Earth's ozone layer, which protects us from harmful ultraviolet rays.
As a result, carbon tetrachloride production has been banned worldwide since 2010 for uses that will result in its release into the atmosphere. However, recent studies have shown that global emissions have not decreased as expected: about 40,000 tonnes were still emitted each year.
The origin of these emissions has worried researchers for many years.
Alongside collaborators from South Korea, South Korea. , Australia and the United States, researchers from the University of Bristol aimed to quantify emissions from East Asia.
To do this, they used atmospheric and ground-based atmospheric concentration data from the Korean peninsula and two models simulating the transport of
Their findings, published in the journal Geophysical Research Letters, show that about half of the world's "missing" carbon tetrachloride emissions originated from eastern China between 2009 and 2016.
Senior author, Dr. Mark Lunt, of the US. Bristol University School of Chemistry, said: "Our results show that carbon tetrachloride emissions from the East Asian region represent
" Not only that, but despite the fact that 39, phase out of carbon tetrachloride production for emissive use in 2010, we found no evidence of further emission reductions. "
In fact, emissions from some regions may have increased slightly since 2010. The results of the study show the emergence of a new source of emissions from Shandong Province in China after 2012.
The results of this study Previous studies in Europe and the United States now account for much of the global distribution of carbon tetrachloride emissions, and there are still major gaps in our knowledge. In addition, recent reports have suggested that very large quantities of this gas could be inadvertently emitted during the manufacture of other chemicals such as chlorine.
Mr. Matt Rigby, Reader in Chemical Chemistry the atmosphere at Bristol University and co-author, said: "Our work shows the location of carbon tetrachloride emissions. However, we do not yet know the responsible processes or industries. This is important because we do not know whether it is produced intentionally or inadvertently. "
He also added," There are parts of the world such as India, the 39, South America and other parts of Asia, where ozone-depleting gas emissions may be in progress, but detailed atmospheric measurements are lacking. "
We hope that this work can now be used by scientists and regulators to identify the cause of these emissions from East Asia.In the end, if these emissions could be avoided, this would accelerate the recovery of the diaper layer. stratospheric ozone
Dr. Lunt said: "Studies like this show that it is important to continually monitor ozone depleting gases. the depletion of the ozone layer is a problem that has been solved. But monitoring gases produced by the destruction of ozone in the atmosphere is essential to ensure the continued success of the elimination of these compounds. "
Research Paper
Related Links
University of Bristol
News on Earth Observation – Suppiliers, Technology and Applications
|
We need your help SpaceDaily's information network continues to grow but revenues have never been harder to maintain. With the rise of ad blockers and Facebook, our sources of Traditional revenue generated by advertising on quality networks continues to decline and unlike many other news sites, we do not have a paywall – with these awkward usernames and pbadwords. information coverage requires time and effort to publish 365 days a year If you find our news sites informative and helpful, then consider becoming a regular supporter or, for the better make a unique contribution. |
||
|
SpaceDaily Contributor $ 5 billed once by credit card or by paypal |
 |
Monthly support by month $ 5 charged per month only by paypal |
A new student of the block takes over for the ozone [19659029] Paris (ESA) Sept. 17, 2018
For more than 20 years, the evolution of ozone over the Antarctica is closely monitored by a succession of European satellites. This important long-term registration is now completed by the Copernicus Sentinel-5P mission, dedicated to atmospheric monitoring.
Protecting life on Earth from the harmful rays of ultraviolet radiation emitted by the Sun, the ozone layer is a very important, but fragile, part of the earth's atmosphere.
In the 1970s and 1980s, the widespread use of chlorofluorocarbons … read more
[ad_2]
Source link
