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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-403
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
08 Jun 2017
Review status
This discussion paper is under review for the journal Atmospheric Chemistry and Physics (ACP).
Measurements of atmospheric ethene by solar absorption FTIR spectrometry
Geoffrey C. Toon, Jean-Francois L. Blavier, and Keeyoon Sung Jet Propulsion Laboratory, California Institute of Technology, CA 91109, USA
Abstract. Atmospheric ethene (C2H4; ethylene) amounts have been retrieved from high-resolution solar absorption spectra measured by the JPL MkIV interferometer. Data recorded from 1985 to 2016 from a dozen ground-based sites have been analyzed. At clean-air sites such as Alaska, Sweden, New Mexico, or the mountains of California, the ethene column was always less than 1015 molec.cm−2 and therefore undetectable. In urban sites such as Pasadena, California, ethane was measurable with column amounts of 20 × 1015 molec.cm−2 observed in the 1990's. Despite the increasing population and traffic in Southern California, a factor 3 decrease in ethene column density is observed over Pasadena in the past 25 years, accompanied by a decrease in CO. This is likely due to Southern California's increasingly stringent vehicle exhaust regulations and tighter enforcement over this period.

Citation: Toon, G. C., Blavier, J.-F. L., and Sung, K.: Measurements of atmospheric ethene by solar absorption FTIR spectrometry, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-403, in review, 2017.
Geoffrey C. Toon et al.
Geoffrey C. Toon et al.
Geoffrey C. Toon et al.

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Short summary
Remote sensing measurements of ethene have been made from the ground and from balloon. Ethene can be measured at low altitudes in polluted regions, such as the Los Angeles basin. Here ethene amounts have decreased by a factor 3 over the past 25 years due to increasingly strict emission control regulations (e.g. on vehicle exhaust).
Remote sensing measurements of ethene have been made from the ground and from balloon. Ethene...
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