Rapid growth of HFC-227ea (1,1,1,2,3,3,3-Heptafluoropropane) in the atmosphere

  • We report the first measurements of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), a substitute for ozone depleting compounds, in remote regions of the atmosphere and present evidence for its rapid growth. Observed mixing ratios ranged from below 0.01 ppt in deep firn air to 0.59 ppt in the northern mid-latitudinal upper troposphere. Firn air samples collected in Greenland were used to reconstruct a history of atmospheric abundance. Year-on-year increases were deduced, with acceleration in the growth rate from 0.026 ppt per year in 2000 to 0.057 ppt per year in 2007. Upper tropospheric air samples provide evidence for a continuing growth until late 2009. Fur- thermore we calculated a stratospheric lifetime of 370 years from measurements of air samples collected on board high altitude aircraft and balloons. Emission estimates were determined from the reconstructed atmospheric trend and suggest that current "bottom-up" estimates of global emissions for 2005 are too high by more than a factor of three.

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Author:Johannes Christian Laube, Patricia Martinerie, Emmanuel Witrant, Thomas Blunier, Jakob Schwander, Carl Brenninkmeijer, Tanja J. SchuckORCiDGND, Michel Bolder, Thomas Röckmann, Cornelis J. van der Veen, Harald Bönisch, Andreas EngelORCiD, Graham Mills, Mike J. Newland, David Oram, Claire E. Reeves, William T. Sturges
Parent Title (English):Atmospheric chemistry and physics. Discussions
Publisher:European Geosciences Union
Place of publication:Katlenburg-Lindau
Document Type:Article
Date of Publication (online):2010/09/03
Date of first Publication:2010/03/24
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2010/09/03
Page Number:23
First Page:7675
Last Page:7697
© Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License.
Institutes:Geowissenschaften / Geographie / Geowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Licence (German):License LogoCreative Commons - Namensnennung 3.0