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dc.contributor.authorArduini, Gabriele
dc.contributor.authorStaquet, C.
dc.contributor.authorChemel, Charles
dc.date.accessioned2017-01-11T20:24:46Z
dc.date.available2017-01-11T20:24:46Z
dc.date.issued2016-10-01
dc.identifier.citationArduini , G , Staquet , C & Chemel , C 2016 , ' Interactions between the night time valley-wind system and a developing cold-air pool ' , Boundary-Layer Meteorology , vol. 161 , no. 1 , pp. 49-72 . https://doi.org/10.1007/s10546-016-0155-8
dc.identifier.issn0006-8314
dc.identifier.otherPURE: 10027667
dc.identifier.otherPURE UUID: fd2824b0-53b9-4cf2-8a33-855bb776a3a2
dc.identifier.otherScopus: 84973099717
dc.identifier.urihttp://hdl.handle.net/2299/17484
dc.descriptionThis is a pre-copyedited, author-produced PDF of an article accepted for publication in Boundary-Layer Meteorology following peer review. The version of record [Arduini, G., Staquet, C & Chemel, C., ‘Interactions between the night time valley-wind system and a developing cold-air pool’, Boundary-Layer Meteorol (2016) 161:1 (49-72), first published online June 2, 2016, is available at Springer online at doi: 10.1007/s10546-016-0155-8
dc.description.abstractThe Weather Research and Forecast (WRF) numerical model is used to characterize the influence of a thermally-driven down-valley flow on a developing cold-air pool in an idealized alpine valley decoupled from the atmosphere above. Results for a three-dimensional (3D) valley, which allows for the formation of a down-valley flow, and for a two-dimensional (2D) valley, where the formation of a down-valley flow is inhibited, are analyzed and compared. A key result is that advection leads to a net cooling in the 2D valley and to a warming in the 3D valley, once the down-valley flow is fully developed. This difference stems from the suppression of the slope-flow induced upward motions over the valley centre in the 3D valley. As a result, the downslope flows develop a cross-valley circulation within the cold-air pool, the growth of the cold-air pool is reduced and the valley atmosphere is generally warmer than in the 2D valley. A quasi-steady state is reached for which the divergence of the down-valley flow along the valley is balanced by the convergence of the downslope flows at the top of the cold-air pool, with no net contribution of subsiding motions far from the slope layer. More precisely, the inflow of air at the top of the cold-air pool is found to be driven by an interplay between the return flow from the plain region and subsidence over the plateaux. Finally, the mechanisms that control the structure of the cold-air pool and its evolution are found to be independent of the valley length as soon as the quasi-steady state is reached and the down-valley flow is fully developed.en
dc.format.extent23
dc.language.isoeng
dc.relation.ispartofBoundary-Layer Meteorology
dc.rightsEmbargoed
dc.subjectCold-air pool
dc.subjectDownslope flow
dc.subjectNumerical simulation
dc.titleInteractions between the night time valley-wind system and a developing cold-air poolen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Atmospheric and Climate Physics Research
dc.contributor.institutionAtmospheric Dynamics & Air Quality
dc.description.statusPeer reviewed
dc.date.embargoedUntil2017-06-02
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2016-10-01
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1007/s10546-016-0155-8
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeEmbargoed


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