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

作者：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

来源：Geophysical Research Letters, 2015, 42(20): 8702-8710.

DOI：10.1002/2015GL065846

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 0.50ppt in 2012-mid-2013 followed by an abrupt drop to similar to 0.44 ppt by early 2015. Global emissions derived from these observations peaked at 3.1kt in 2011, followed by a rapid decline of similar to 0.5 ktyr(-2) to reach 1.5 ktyr(-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 ktyr(-1) although emission hot spots were identified in France.

• 出版日期2015-10-28
• 单位中国极地研究中心; CSIRO; 中央民族大学