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| Titel |
ACE-FTS observation of a young biomass burning plume: first reported measurements of C2H4, C3H6O, H2CO and PAN by infrared occultation from space |
| VerfasserIn |
P.-F. Coheur, H. Herbin, C. Clerbaux, D. Hurtmans, C. Wespes, M. Carleer, S. Turquety, C. P. Rinsland, J. Remedios, D. Hauglustaine, C. D. Boone, P. F. Bernath |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 20 ; Nr. 7, no. 20 (2007-10-19), S.5437-5446 |
| Datensatznummer |
250005236
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| Publikation (Nr.) |
 copernicus.org/acp-7-5437-2007.pdf |
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| Zusammenfassung |
| 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. |
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