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

  • Martin Vollmer (Lead Author)
  • , Matt Rigby
  • , Johannes Laube
  • , Stephan Henne
  • , Tae Siek Rhee
  • , Lauren Gooch
  • , Angelina Wenger
  • , Dickon Young
  • , Paul Steele
  • , Ray Langenfelds
  • , Carl Brenninkmeijer
  • , Jia-Lin Wang
  • , Chang-Feng Ou-Yang
  • , Simon Wyss
  • , Matthias Hill
  • , David Oram
  • , Paul Krummel
  • , Fabian Schoenenberger
  • , Christoph Zellweger
  • , Paul Fraser
  • William Sturges, Simon O'Doherty, Stefan Reimann

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)
25 Downloads (Pure)

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 at- mospheric 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 reversal 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 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 sam- ples collected in Taiwan. European emissions are estimated to be <0.1 kt yr−1 although emission hotspots were identi- fied in France.
Original languageEnglish
Pages (from-to)8702–8710
Number of pages9
JournalGeophysical Research Letters
Volume42
Issue number20
Early online date23 Oct 2015
DOIs
Publication statusPublished - 28 Oct 2015

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