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dc.contributor.authorChemel, C.
dc.contributor.authorBurns, Paul
dc.date.accessioned2015-02-18T08:48:16Z
dc.date.available2015-02-18T08:48:16Z
dc.date.issued2015-03-01
dc.identifier.citationChemel , C & Burns , P 2015 , ' Pollutant dispersion in a developing valley cold-air pool ' , Boundary-Layer Meteorology , vol. 154 , no. 3 , pp. 391-408 . https://doi.org/10.1007/s10546-014-9984-5
dc.identifier.issn0006-8314
dc.identifier.otherPURE: 7753392
dc.identifier.otherPURE UUID: 5f36ac8b-d34e-4936-abb0-4bd59433ccc4
dc.identifier.otherScopus: 84925497658
dc.identifier.urihttp://hdl.handle.net/2299/15379
dc.description.abstractPollutants are trapped and accumulate within cold-air pools, thereby affecting air quality. A numerical model is used to quantify the role of cold-air-pooling processes in the dispersion of air pollution in a developing cold-air pool within an alpine valley under decoupled stable conditions. Results indicate that the negatively buoyant downslope flows transport and mix pollutants into the valley to depths that depend on the temperature deficit of the flow and the ambient temperature structure inside the valley. Along the slopes, pollutants are generally entrained above the cold-air pool and detrained within the cold-air pool, largely above the ground-based inversion layer. The ability of the cold-air pool to dilute pollutants is quantified. The analysis shows that the downslope flows fill the valley with air from above, which is then largely trapped within the cold-air pool, and that dilution depends on where the pollutants are emitted with respect to the positions of the top of the ground-based inversion layer and cold-air pool, and on the slope wind speeds. Over the lower part of the slopes, the cold-air-pool-averaged concentrations are proportional to the slope wind speeds where the pollutants are emitted, and diminish as the cold-air pool deepens. Pollutants emitted within the ground-based inversion layer are largely trapped there. Pollutants emitted farther up the slopes detrain within the cold-air pool above the ground-based inversion layer, although some fraction, increasing with distance from the top of the slopes, penetrates into the ground-based inversion layer.en
dc.language.isoeng
dc.relation.ispartofBoundary-Layer Meteorology
dc.titlePollutant dispersion in a developing valley cold-air poolen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Atmospheric and Climate Physics Research
dc.contributor.institutionAtmospheric Dynamics & Air Quality
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1007/s10546-014-9984-5
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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