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dc.contributor.authorBrasseur, G.P.
dc.contributor.authorMüller, J.-F.
dc.contributor.authorGranier, C.
dc.date1996
dc.date.accessioned2017-05-23T10:04:27Z
dc.date.available2017-05-23T10:04:27Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/5506
dc.descriptionThree-dimensional model calculations suggest that the world's fleet of subsonic aircraft has enhanced the abundance of nitrogen oxides in the upper troposphere by up to 20-35% and has produced a significant increase in the ozone concentration in this region of the atmosphere (4% in summer and 1% in winter). In year 2050, on the basis of current scenarios for growth in aviation, the concentration of NOx at 10 km could increase by 30-60% at midlatitudes, and the concentration of ozone could be enhanced by 7% and 2% in summer and winter, respectively (relative to a situation without aircraft effects). The perturbation is not limited to the flight corridors but affects the entire northern hemisphere. The magnitude (and even the sign) of the ozone change depends on the level of background atmospheric NOx and hence on NOx sources (lightning, intrusion from the stratosphere, and convective transport from the polluted boundary layer) and sinks which are poorly quantified in this region of the atmosphere. On the basis of our model estimates, 20% of the NOx found at 10 km (midlatitudes) is produced by aircraft engines, 25% originates from the surface (combustion and soils), and approximately 50% is produced by lightning. For a lightning source enhanced in the model by a factor of 2, the increase in NOx and ozone at 10 km due to aircraft emissions, is reduced by a factor of 2. The magnitude of aircraft perturbations in NOx is considerably smaller than the uncertainties in other NOx sources.
dc.languageeng
dc.titleAtmospheric impact of NOx emissions by subsonic aircraft: A three-dimensional model study
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freefuture growth prediction
dc.subject.freenitrogen oxide emission
dc.subject.freeozone increase
dc.subject.freesubsonic aircraft emission
dc.subject.freethree dimensional modelling
dc.source.titleJournal of Geophysical Research Atmospheres
dc.source.volume101
dc.source.issueD1
dc.source.page1423-1428
Orfeo.peerreviewedYes
dc.identifier.doi10.1007/BF00053797
dc.identifier.scopus2-s2.0-0029773522


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