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Global emissions of HFC-143a (CH3CF3) and HFC-32 (CH2F2) from in situ and air archive atmospheric observations

O'Doherty, S. ; Rigby, M. ; Mühle, J. ; Ivy, D. J. ; Miller, B. R. ; Young, D. ; Simmonds, P. G. ; Reimann, S. ; Vollmer, M. K. and Krummel, P. B. , et al. (2014) In Atmospheric Chemistry and Physics 14(17). p.9249-9258
Abstract

High-frequency, in situ observations from the Advanced Global Atmospheric Gases Experiment (AGAGE), for the period 2003 to 2012, combined with archive flask measurements dating back to 1977, have been used to capture the rapid growth of HFC-143a (CH3CF3) and HFC- 32 (CH2F2) mole fractions and emissions into the atmosphere. Here we report the first in situ global measurements of these two gases. HFC-143a and HFC-32 are the third and sixth most abundant hydrofluorocarbons (HFCs) respectively and they currently make an appreciable contribution to the HFCs in terms of atmospheric radiative forcing (1.7±0.04 and 0.7±0.02mWm-2 in 2012 respectively). In 2012 the global average mole fraction of HFC-... (More)

High-frequency, in situ observations from the Advanced Global Atmospheric Gases Experiment (AGAGE), for the period 2003 to 2012, combined with archive flask measurements dating back to 1977, have been used to capture the rapid growth of HFC-143a (CH3CF3) and HFC- 32 (CH2F2) mole fractions and emissions into the atmosphere. Here we report the first in situ global measurements of these two gases. HFC-143a and HFC-32 are the third and sixth most abundant hydrofluorocarbons (HFCs) respectively and they currently make an appreciable contribution to the HFCs in terms of atmospheric radiative forcing (1.7±0.04 and 0.7±0.02mWm-2 in 2012 respectively). In 2012 the global average mole fraction of HFC- 143a was 13.4±0.3 ppt (1o) in the lower troposphere and its growth rate was 1.4±0.04 ppt yr-1; HFC-32 had a global mean mole fraction of 6.2±0.2 ppt and a growth rate of 1.1±0.04 ppt yr-1 in 2012. The extensive observations presented in this work have been combined with an atmospheric transport model to simulate global atmospheric abundances and derive global emission estimates. It is estimated that 23±3 Gg yr-1 of HFC-143a and 21±11 Gg yr-1 of HFC- 32 were emitted globally in 2012, and the emission rates are estimated to be increasing by 7±5%yr-1 for HFC-143a and 14±11%yr-1 for HFC-32.

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publishing date
type
Contribution to journal
publication status
published
in
Atmospheric Chemistry and Physics
volume
14
issue
17
pages
10 pages
publisher
Copernicus GmbH
external identifiers
  • scopus:84920894470
ISSN
1680-7316
DOI
10.5194/acp-14-9249-2014
language
English
LU publication?
no
additional info
Publisher Copyright: © Author(s) 2014.
id
18a45c66-8f7e-4de5-8525-8a9383e5272b
date added to LUP
2024-10-24 18:34:54
date last changed
2025-02-28 06:18:12
@article{18a45c66-8f7e-4de5-8525-8a9383e5272b,
  abstract     = {{<p>High-frequency, in situ observations from the Advanced Global Atmospheric Gases Experiment (AGAGE), for the period 2003 to 2012, combined with archive flask measurements dating back to 1977, have been used to capture the rapid growth of HFC-143a (CH<sub>3</sub>CF<sub>3</sub>) and HFC- 32 (CH<sub>2</sub>F<sub>2</sub>) mole fractions and emissions into the atmosphere. Here we report the first in situ global measurements of these two gases. HFC-143a and HFC-32 are the third and sixth most abundant hydrofluorocarbons (HFCs) respectively and they currently make an appreciable contribution to the HFCs in terms of atmospheric radiative forcing (1.7±0.04 and 0.7±0.02mWm-2 in 2012 respectively). In 2012 the global average mole fraction of HFC- 143a was 13.4±0.3 ppt (1o) in the lower troposphere and its growth rate was 1.4±0.04 ppt yr-1; HFC-32 had a global mean mole fraction of 6.2±0.2 ppt and a growth rate of 1.1±0.04 ppt yr<sup>-1</sup> in 2012. The extensive observations presented in this work have been combined with an atmospheric transport model to simulate global atmospheric abundances and derive global emission estimates. It is estimated that 23±3 Gg yr<sup>-1</sup> of HFC-143a and 21±11 Gg yr<sup>-1</sup> of HFC- 32 were emitted globally in 2012, and the emission rates are estimated to be increasing by 7±5%yr<sup>-1</sup> for HFC-143a and 14±11%yr-1 for HFC-32.</p>}},
  author       = {{O'Doherty, S. and Rigby, M. and Mühle, J. and Ivy, D. J. and Miller, B. R. and Young, D. and Simmonds, P. G. and Reimann, S. and Vollmer, M. K. and Krummel, P. B. and Fraser, P. J. and Steele, L. P. and Dunse, B. and Salameh, P. K. and Harth, C. M. and Arnold, T. and Weiss, R. F. and Kim, J. and Park, S. and Li, S. and Lunder, C. and Hermansen, O. and Schmidbauer, N. and Zhou, L. X. and Yao, B. and Wang, R. H.J. and Manning, A. J. and Prinn, R. G.}},
  issn         = {{1680-7316}},
  language     = {{eng}},
  number       = {{17}},
  pages        = {{9249--9258}},
  publisher    = {{Copernicus GmbH}},
  series       = {{Atmospheric Chemistry and Physics}},
  title        = {{Global emissions of HFC-143a (CH<sub>3</sub>CF<sub>3</sub>) and HFC-32 (CH<sub>2</sub>F<sub>2</sub>) from in situ and air archive atmospheric observations}},
  url          = {{http://dx.doi.org/10.5194/acp-14-9249-2014}},
  doi          = {{10.5194/acp-14-9249-2014}},
  volume       = {{14}},
  year         = {{2014}},
}