Publication


P.-F. Coheur, et al.
ACE-FTS observation of a young biomass burning plume: first reported measurements of C2H4, C3H6O, H2CO and PAN by infrared occultation from space
Atmospheric Chemistry and Physics, 7(20), 5437-5446, 2007; doi: 10.5194/acp-7-5437-2007
H2CO C2H4 C3H6O
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Abstract


In the course of our study of the upper tropospheric composition with the infrared Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE–FTS), we found an occultation sequence that on 8 October 2005, sampled a remarkable plume near the east coast of Tanzania. Model simulations of the CO distribution in the Southern hemisphere are performed for this period and they suggest that the emissions for this event likely originated from a nearby forest fire, after which the plume was transported from the source region to the upper troposphere. Taking advantage of the very high signal-to-noise ratio of the ACE–FTS spectra over a wide wavenumber range (750–4400 cm−1), we present in-depth analyses of the chemical composition of this plume in the middle and upper troposphere, focusing on the measurements of weakly absorbing pollutants. For this specific biomass burning event, we report simultaneous observations of an unprecedented number of organic species. Measurements of C2H4 (ethene), C3H4 (propyne), H2CO (formaldehyde), C3H6O (acetone) and CH3COO2NO2 (peroxyacetylnitrate, abbreviated as PAN) are the first reported detections using infrared occultation spectroscopy from satellites. Based on the lifetime of the emitted species, we discuss the photochemical age of the plume and also report, whenever possible, the enhancement ratios relative to CO.

Reference


@article{acp-7-5437-2007,
  author = "P.-F. Coheur and H. Herbin and C. Clerbaux and D. Hurtmans and C. Wespes and M. Carleer and S. Turquety and C. P. Rinsland and J. Remedios and D. Hauglustaine and C. D. Boone and P. F. Bernath",
  title = "ACE-FTS observation of a young biomass burning plume: first reported measurements of C2H4, C3H6O, H2CO and PAN by infrared occultation from space",
  year = 2007,
  journal = "Atmospheric Chemistry and Physics",
  volume = 7,
  number = 20,
  pages = "5437-5446",
  month = "Oct",
  keywords = "H2CO, C2H4, C3H6O",
  doi = "10.5194/acp-7-5437-2007",
  url = "https://www.atmos-chem-phys.net/7/5437/2007/"
}
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