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| Titel |
Small- and medium-scale effects of high-flying aircraft exhausts on the atmospheric composition |
| VerfasserIn |
I. L. Karol, Y. E. Ozolin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 12, no. 10/11 ; Nr. 12, no. 10/11, S.979-985 |
| Datensatznummer |
250010335
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| Publikation (Nr.) |
 copernicus.org/angeo-12-979-1994.pdf |
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| Zusammenfassung |
| Following numerous model studies of the
global impacts of sub- and supersonic aircraft on the atmosphere, this paper
assesses the separate aircraft engine exhaust effects of the 45°N cruise flight
and at the 10- and 18-km levels of the July atmosphere. A box diffusion
photochemical model in the cross-section plane of the flight trajectory is used
to compute the effects of gas-phase and heterogeneous reactions on the
condensation trail particles in the troposphere, and on the sulphate aerosols in
the stratosphere. The enhanced horizontal dispersion of the exhaust plume is
considered in the model. A significant but short term depletion of ozone is
predicted, which is 99% restored in about 1 h in the wide plume with enhanced
horizontal dispersion, but requires more than 24 h in the narrow plume without
it. The oxidation rate of NO and NO2 into the HNO3 depends
on the OH content in the exhausts and varies in all the cases. The heterogeneous
photochemistry has only a small influence on the initial evolution of N2O5
and HO2 in the plume. |
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