globalchange  > 科学计划与规划
DOI: 10.1002/2015GL064709
First observations, trends, and emissions of HCFC-31 (CH2ClF) in the global atmosphere
Author: Schoenenberger F.; Vollmer M.K.; Rigby M.; Hill M.; Fraser P.J.; Krummel P.B.; Langenfelds R.L.; Rhee T.S.; Peter T.; Reimann S.
Source Publication: Geophysical Research Letters
ISSN: 0094-9582
EISSN: 1944-9313
Publishing Year: 2015
Volume: 42, Issue:18
pages begin: 7817
pages end: 7824
Language: 英语
Keyword: new compound
Scopus Keyword: Atmospheric movements ; Chemistry transport model ; Global emissions ; In-situ analysis ; Intermediate product ; Manufacturing process ; new compound ; Northern Hemispheres ; Production methods ; Atmospheric chemistry ; atmospheric chemistry ; emission ; global change ; landfill ; two-dimensional modeling
English Abstract: We report the first multiyear atmospheric record of HCFC-31 (CH2ClF), based on flask samples and in situ analyses of air from both hemispheres. Although HCFC-31 has never been produced in large amounts, observed mole fractions in the Northern Hemisphere increased from 2000 onward, reaching 170 ppq (parts per quadrillion, 10-15) in 2011-2012 before decreasing rapidly. By combining our observations with a two-dimensional atmospheric chemistry-transport model, we infer an increase in global emissions from 240- t- yr-1 in 2000 to 840- t- yr-1 in 2011-2012, followed by a relatively fast decline to 570- t- yr-1 in 2014. Emissions of HCFC-31 originate most probably from intermediate product release during the manufacturing process of HFC-32 (CH2F2). The rapid decline in recent years could be due to changes in production methods rather than declines in diffusive sources such as landfills or HCFC-31 contaminations in merchandised HFC-32. Key Point First observations of HCFC-31 in the atmosphere © 2015 American Geophysical Union. All Rights Reserved.
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Document Type: 期刊论文
Appears in Collections:科学计划与规划

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Affiliation: Laboratory for Air Pollution and Environmental Technology, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland

Recommended Citation:
Schoenenberger F.,Vollmer M.K.,Rigby M.,et al. First observations, trends, and emissions of HCFC-31 (CH2ClF) in the global atmosphere[J]. Geophysical Research Letters,2015-01-01,42(18).
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