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| Titel |
Global emissions of HFC-143a (CH3CF3) and HFC-32 (CH2F2) from in situ and air archive atmospheric observations |
| VerfasserIn |
S. O'Doherty, M. Rigby, J. Mühle, D. J. Ivy, B. R. Miller, D. Young, P. G. Simmonds, S. Reimann, M. K. Vollmer, P. B. Krummel, P. J. Fraser, L. P. Steele, B. Dunse, P. K. Salameh, C. M. Harth, T. Arnold, R. F. Weiss, J. Kim, S. Park, S. Li, C. Lunder, O. Hermansen, N. Schmidbauer, L. X. Zhou, B. Yao, R. H. J. Wang, A. J. Manning, R. G. Prinn |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 17 ; Nr. 14, no. 17 (2014-09-09), S.9249-9258 |
| Datensatznummer |
250119012
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| Publikation (Nr.) |
 copernicus.org/acp-14-9249-2014.pdf |
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| Zusammenfassung |
| 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 ± 0.02 mW m−2 in 2012 respectively). In
2012 the global average mole fraction of HFC-143a was 13.4 ± 0.3 ppt
(1σ) 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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