First observations, trends, and emissions of HCFC-31 (CH2ClF) in the global atmosphere

Fabian Schoenenberger*, Martin K. Vollmer, Matthew Rigby, Matthias Hill, Paul J. Fraser, Paul B. Krummel, Ray L. Langenfelds, Tae Siek Rhee, Thomas Peter, Stefan Reimann

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

6 Citations (Scopus)

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

Original languageEnglish
Pages (from-to)7817-7824
Number of pages8
JournalGeophysical Research Letters
Volume42
Issue number18
DOIs
Publication statusPublished - 28 Sep 2015

Keywords

  • new compound

Fingerprint Dive into the research topics of 'First observations, trends, and emissions of HCFC-31 (CH<sub>2</sub>ClF) in the global atmosphere'. Together they form a unique fingerprint.

  • Projects

    Cite this

    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. (2015). First observations, trends, and emissions of HCFC-31 (CH2ClF) in the global atmosphere. Geophysical Research Letters, 42(18), 7817-7824. https://doi.org/10.1002/2015GL064709