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

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题名:	Abrupt reversal in emissions and atmospheric abundance of HCFC-133a (CF3CH2Cl)
作者:	歐陽長風;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
贡献者:	理學院化學學系
关键词:	Abundance;Air pollution;Anthropogenic factors;Atmospheric chemistry;Chlorofluorocarbons;Consumption;Drying;Emissions;Emissivity;HCFC;High resolution;Hot spots;Hydrocarbons;Hydrochlorofluorocarbons;Identification;Montreal Protocol;Northern Hemisphere;Records;Spots
日期:	2015-01-01
上传时间:	2026-04-21 14:32:06 (UTC+8)
出版者:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
摘要:	摘要： 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. Key Points Atmospheric abundances of HCFC‐133a and emissions have suddenly reversed in the last three years The sources of HCFC‐133a to the atmosphere are likely from the production of HFC‐134a In Europe, the emissions of HCFC‐133a are less than 0.1 kt/yr while globally about 1.5 kt/yr 其他題名： Geophys. Res. Lett 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2015-10-28 出處： Geophysical research letters, 2015-10, Vol.42 (20), p.8702-8710 資源來源： Wiley Journals 版權： 2015. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 0094-8276 識別號： ISSN: 1944-8007 識別號： EISSN: 1944-8007 識別號： DOI: 10.1002/2015GL065846
显示于类别:	[化學學系] 期刊論文

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