Continued emissions of the ozone-depleting substance carbon tetrachloride from Eastern Asia

TitleContinued emissions of the ozone-depleting substance carbon tetrachloride from Eastern Asia
Publication TypeJournal Article
Year of Publication2018
AuthorsLunt M.F, Park S., Li S., Henne S., Manning A.J, Ganesan A.L, Simpson I.J, Blake D.R, Liang Q., O'Doherty S, Harth CM, Mühle J, Salameh PK, Weiss RF, Krummel PB, Fraser PJ, Prinn RG, Reimann S., Rigby M
JournalGeophysical Research Letters
Date Published2018/09
ISBN Number0094-8276
Keywordscarbon tetrachloride; ccl4; china; emissions; inverse modeling
Abstract

Carbon tetrachloride (CCl4) is an ozone-depleting substance, accounting for about 10% of the chlorine in the troposphere. Under the terms of the Montreal Protocol, its production for dispersive uses was banned from 2010. In this work we show that, despite the controls on production being introduced, CCl4 emissions from the eastern part of China did not decline between 2009 and 2016. This finding is in contrast to a recent bottom-up estimate, which predicted a significant decrease in emissions after the introduction of production controls. We find eastern Asian emissions of CCl4 to be 16 (9?24) Gg/year on average between 2009 and 2016, with the primary source regions being in eastern China. The spatial distribution of emissions that we derive suggests that the source distribution of CCl4 in China changed during the 8-year study period, indicating a new source or sources of emissions from China's Shandong province after 2012.

DOI10.1029/2018GL079500
Student Publication: 
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