Skip to Main content Skip to Navigation
Journal articles

Accelerating growth of HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane) in the atmosphere

Abstract : We report the first measurements of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), a substitute for ozone depleting compounds, in air samples originating from remote regions of the atmosphere and present evidence for its accelerating growth. Observed mixing ratios ranged from below 0.01 ppt in deep firn air to 0.59 ppt in the current 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 0.029 ppt per year in 2000 to 0.056 ppt per year in 2007. Upper tropospheric air samples provide evidence for a continuing growth until late 2009. Furthermore 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 a factor of three.
Document type :
Journal articles
Complete list of metadatas

Cited literature [42 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-00554357
Contributor : Aurore Gayraud <>
Submitted on : Monday, February 27, 2012 - 1:15:36 PM
Last modification on : Wednesday, October 7, 2020 - 11:40:09 AM
Long-term archiving on: : Friday, November 23, 2012 - 2:56:32 PM

File

acp-10-5903-2010.pdf
Publisher files allowed on an open archive

Identifiers

Citation

J. C. Laube, Patricia Martinerie, Emmanuel Witrant, T. Blunier, J. Schwander, et al.. Accelerating growth of HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane) in the atmosphere. Atmospheric Chemistry and Physics, European Geosciences Union, 2010, 10 (13), pp.5903-5910. ⟨10.5194/acp-10-5903-2010⟩. ⟨insu-00554357⟩

Share

Metrics

Record views

1334

Files downloads

576