National Institute for Environmental Studies (NIES): Identify emission areas of ozone-depleting substances-Article published in “Nature”
University of Bristol, UK:
International research group (including National Institute for Environmental Studies),
From the analysis of atmospheric observation data, we clarified the emission zone of ozone-depleting substances.
We have confirmed that the amount of CFC-11, a fluorocarbon that causes ozone depletion, has increased in eastern China since 2013.
Published in the English science magazine “Nature” May 23, 2019 edition.
International Freon Regulation:
The release of CFC-11 has been long decreasing since the late 80’s.
However, since around 2012, CFC-11 emissions have increased.
It is urgent to identify the unknown emission source that causes it.
Results of this study: Annual emissions from eastern China
Annual emissions from eastern China increased sharply.
It is estimated that it will increase approximately 7000 tons in 2014-2017 compared with 2008-2012.
The amount accounts for at least 40 to 60% of the increase in global emissions.
Despite the total elimination in 2010, CFC-11 is likely to be newly manufactured and used.
Release of CFC-11: Montreal Protocol
Under the Montreal Protocol framework, the Expert Panel of the Protocol is to investigate and report on CFC-11 emission status and possible sources.
The results of this research are expected to help research and study based on the Protocol framework.
2019 | National Institute for Environmental Studies