MIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Global emissions of HFC-143a (CH[subscript 3]CF[subscript 3]) and HFC-32 (CH[subscript 2]F[subscript 2]) from in situ and air archive atmospheric observations

Author(s)
O'Doherty, S.; Rigby, M.; Mühle, J.; Miller, B. R.; Young, D.; Simmonds, P. G.; Reimann, S.; Vollmer, M. K.; Krummel, P. B.; Fraser, P. J.; Steele, L. P.; Dunse, B.; Salameh, P. K.; Harth, C. M.; Arnold, T.; Weiss, R. F.; Kim, J.; Park, S.; Li, S.; Lunder, C.; Hermansen, O.; Schmidbauer, N.; Zhou, L. X.; Yao, B.; Wang, R. H. J.; Manning, A. J.; Prinn, R. G.; Ivy, Diane J; ... Show more Show less
Thumbnail
Downloadacp-14-9249-2014.pdf (944.5Kb)
Terms of use
Attribution 3.0 Unported (CC BY 3.0) https://creativecommons.org/licenses/by/3.0/
Metadata
Show full item record
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 (CH[subscript 3]CF[subscript 3]) and HFC- 32 (CH[subscript 2]F[subscript 2]) 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[superscript -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[superscript -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 [superscript -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[superscript -1] of HFC-143a and 21±11 Gg yr[superscript -1] of HFC- 32 were emitted globally in 2012, and the emission rates are estimated to be increasing by 7±5%yr[superscript -1] for HFC-143a and 14±11%yr[superscript -1] for HFC-32.
Date issued
2014-09
URI
http://hdl.handle.net/1721.1/115973
Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Journal
Atmospheric Chemistry and Physics
Publisher
Copernicus GmbH
Citation
O’Doherty, S., et al. “Global Emissions of HFC-143a (CH[subscript 3]CF[subscript 3]) and HFC-32 (CH[subscript 2]F[subscript 2]) from in Situ and Air Archive Atmospheric Observations.” Atmospheric Chemistry and Physics, vol. 14, no. 17, Sept. 2014, pp. 9249–58. Crossref, doi:10.5194/acp-14-9249-2014. © 2014 Authors
ISSN
1680-7324

Collections
  • MIT Open Access Articles

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries
PrivacyPermissionsAccessibilityContact us
MIT
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.