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Continued Emissions of the Ozone‐Depleting Substance Carbon Tetrachloride From Eastern Asia
Author(s) -
Lunt 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 C. M.,
Mühle J.,
Salameh P. K.,
Weiss R. F.,
Krummel P. B.,
Fraser P. J.,
Prinn R. G.,
Reimann S.,
Rigby M.
Publication year - 2018
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2018gl079500
Subject(s) - ozone , montreal protocol , environmental science , china , troposphere , carbon tetrachloride , greenhouse gas , atmospheric sciences , chlorine , geography , ozone layer , meteorology , chemistry , geology , oceanography , archaeology , organic chemistry
Carbon tetrachloride (CCl 4 ) 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, CCl 4 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 CCl 4 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 CCl 4 in China changed during the 8‐year study period, indicating a new source or sources of emissions from China's Shandong province after 2012.