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Abrupt reversal in emissions and atmospheric abundance of HCFC-133a (CF3CH2Cl)

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Title
Abrupt reversal in emissions and atmospheric abundance of HCFC-133a (CF3CH2Cl)
Authors
Vollmer, Martin K.
Rigby, Matt
Laube, Johannes C.
Henne, Stephan
Rhee, Tae Siek
Gooch, Lauren J.
Wenger, Angelina
Young, Dickon
Steele, L. Paul
Langenfelds, Ray L.
Brenninkmeijer, Carl A. M.
Wang, Jia-Lin
Ou-Yang, Chang-Feng
Wyss, Simon A.
Hill, Matthias
Oram, David E.
Krummel, Paul B.
Schoenenberger, Fabian
Zellweger, Christoph
Fraser, Paul J.
Sturges, William T.
O’Doherty, Simon
Reimann, Stefan
Subject
Geology
Keywords
Atmospheric abundances; Emission; HCFC-133a
Issue Date
2015
Citation
Vollmer, Martin K., et al. 2015. "Abrupt reversal in emissions and atmospheric abundance of HCFC-133a (CF3CH2Cl)". Geophysical Research Letters, 42: 8702-8710.
Abstract
Hydrochlorofluorocarbon HCFC-133a (CF3CH2Cl) is an anthropogenic compound whose consumption for emissive use is restricted under the Montreal Protocol. A recent study showed rapidly increasing atmospheric abundances and emissions. We report that, following this rise, the atmospheric abundance and emissions have declined sharply in the past three years. We find a Northern Hemisphere HCFC-133a increase from 0.13 ppt (dry-air mole fraction in parts per trillion) in 2000 to 0.50 ppt in 2012-mid-2013 followed by an abrupt drop to ∼0.44 ppt by early 2015. Global emissions derived from these observations peaked at 3.1 kt in 2011, followed by a rapid decline of ∼0.5 kt yr-2 to reach 1.5 kt yr-1 in 2014. Sporadic HCFC-133a pollution events are detected in Europe from our high-resolution HCFC-133a records at three European stations, and in Asia from samples collected in Taiwan. European emissions are estimated to be <0.1 kt yr-1 although emission hot spots were identified in France.
DOI
http://dx.doi.org/10.1002/2015GL065846.
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