HCFC-22 emissions at global and regional scales between 1995 and 2010: Trends and variability

A. Fortems-Cheiney, F. Chevallier, M. Saunois, I. Pison, P. Bousquet, C. Cressot, H.J. Wang, Y. Yokouchi, F. Artuso

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HCFC-22 (CHClF2, chlorodifluoromethane) is an ozone-depleting substance, the consumption of which is controlled under the Montreal Protocol. Within a Bayesian inversion framework, we use measurements of HCFC-22 atmospheric concentrations to constrain estimates of HCFC-22 emissions, at the grid point 3.75°×2.5°and 8 day resolution, from January 1995 to December 2010. Starting from a new gridded bottom-up inventory which is then optimized, our method shows continuously rising global emissions, from 182±11 Gg in 1995 to the maximum of 410±9 Gg in 2009. This is mainly due to an increase of emissions in developing regions, particularly in Eastern Asia, and occurs despite the current phase-out in developed countries. The high temporal resolution of our inversion (8 day) allows to reveal some of the emission seasonality, the global posterior sources ranging from 25 Gg/month in November to 42 Gg/month in July, for example, in 2010. Key Points inversion of HCFC-22 emissions for the long period 1995 to 2010 reduction of the uncertainties associated with HCFC-22 emissions revelation of HCFC-22 emissions seasonality ©2013. American Geophysical Union. All Rights Reserved.
Original languageEnglish
Pages (from-to)7379 - 7388
Number of pages10
JournalJournal of Geophysical Research
Issue number13
Publication statusPublished - 16 Jul 2013
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Fortems-Cheiney, A., Chevallier, F., Saunois, M., Pison, I., Bousquet, P., Cressot, C., ... Artuso, F. (2013). HCFC-22 emissions at global and regional scales between 1995 and 2010: Trends and variability. Journal of Geophysical Research, 118(13), 7379 - 7388. https://doi.org/10.1002/jgrd.50544