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dc.contributor.authorPino González, David
dc.contributor.authorLothon, Marie
dc.contributor.authorAngevine, Wayne M.
dc.contributor.authorBange, Jens
dc.contributor.authorBeare, R.J.
dc.contributor.authorBeyrich, Frank
dc.contributor.authorCanut, Guylaine
dc.contributor.authorCouvreux, Fleur
dc.contributor.authorDelbarre, Hervé
dc.contributor.authorGibert, Fabien
dc.contributor.authorJonker, Harm J. J.
dc.contributor.authorLenschow, Donald
dc.contributor.authorLohou, Fabienne
dc.contributor.authorMahrt, Larry
dc.contributor.authorPardyjak, Eric
dc.contributor.authorSorbjan, Zibgniew
dc.contributor.authorVilà-Guerau de Arellano, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física Aplicada
dc.identifier.citationPino, D. [et al.]. Studying the Boundary Layer Late Afternoon nd Sunset Turbulence (BLLAST). A: Symposium on Boundary Layers and Turbulence. "Proceedings if the 19th Symposium on Boundary Layers and Turbulence". Keystone: 2010, p. 1-4.
dc.description.abstractAt the end of the afternoon, when the surface heat fluxes start to sharply decrease, the CBL turns from a convective well-mixed layer to an intermittently turbulent residual layer overlying a stably-stratified boundary layer. This transition raises several observational and modeling issues. Even the definition of the boundary layer during this period is fuzzy, since there is no consensus on what criteria to use and no simple scaling laws to apply. Yet it plays an important role in such diverse atmospheric phenomena as transport and diffusion of trace constituents or wind energy production. This phase of the diurnal cycle remains largely unexplored, partly due to the difficulty of measuring weak and intermittent turbulence, anisotropy, horizontal heterogeneity, and rapid time changes. The Boundary Layer Late Afternoon and Sunset Turbulence (BLLAST) project is gathering about thirty research scientists from the European Union and the United States to work on this issue. A field campaign (BLLAST-FE) is planned for spring or summer 2011 in Europe. BLLAST will utilize these observations, as well as previous datasets, large-eddy and direct numerical simulations, and mesoscale modeling to better understand the processes, suggest new parameterizations, and evaluate forecast models during this transitional period. We will present the issues raised by the late afternoon transition and our strategy to study it.
dc.format.extent4 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshBoundary layer
dc.titleStudying the Boundary Layer Late Afternoon nd Sunset Turbulence (BLLAST)
dc.typeConference lecture
dc.subject.lemacCapa límit (Meteorologia)
dc.contributor.groupUniversitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorPino, D.; Lothon, M.; Angevine, W.; Bange, J.; Beare, R.J.; Beyrich, F.; Canut, G.; Couvreux, F.; Delbarre, H.; Gibert, F.; Jonker, H. J. J.; Lenschow, D.; Lohou, F.; Mahrt, L.; Pardyjak, E.; Sorbjan, Z.; Vilà-Guerau de Arellano, J.
local.citation.contributorSymposium on Boundary Layers and Turbulence
local.citation.publicationNameProceedings if the 19th Symposium on Boundary Layers and Turbulence

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