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dc.contributor.authorde Lozar, Alberto
dc.contributor.authorMellado González, Juan Pedro
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2020-06-10T06:17:23Z
dc.date.available2020-06-10T06:17:23Z
dc.date.issued2015-09-15
dc.identifier.citationde Lozar, A.; Mellado, J. P. Evaporative cooling amplification of the entrainment velocity in radiatively driven stratocumulus. "Geophysical research letters", 15 Setembre 2015, vol. 42, p. 7223-7229.
dc.identifier.issn0094-8276
dc.identifier.urihttp://hdl.handle.net/2117/190364
dc.description.abstractEvaporative cooling monotonically increases as the thermodynamical properties of the inversion allow for more evaporation in shear-free radiatively driven stratocumulus. However, the entrainment velocity can deviate from the evaporative cooling trend and even become insensitive to variations in the inversion properties. Here the efficiency of evaporative cooling at amplifying the entrainment velocity is quantified by means of direct numerical simulations of a cloud top mixing layer. We demonstrate that variations in the efficiency modulate the effect of evaporative cooling on entrainment, explaining the different trends. These variations are associated with the evaporation of droplets in cloud holes below the inversion point. The parametrization of the efficiency provides the evaporative amplification of the entrainment velocity as a function of a single parameter that characterizes the inversion. The resulting entrainment velocities match our experiments and previous measurements to within ±25%. The parametrization also predicts the transition to a broken-cloud field consistently with observations.
dc.format.extent7 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshShear flow
dc.subject.lcshAtmospheric physics
dc.subject.lcshEvaporative cooling
dc.subject.lcshClouds
dc.subject.otherStratocumulus
dc.subject.otherEntrainment velocity
dc.subject.otherEvaporative cooling
dc.titleEvaporative cooling amplification of the entrainment velocity in radiatively driven stratocumulus
dc.typeArticle
dc.subject.lemacFísica atmosfèrica
dc.subject.lemacCapa límit (Dinàmica de fluids)
dc.identifier.doi10.1002/2015GL065529
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2015GL065529
dc.rights.accessOpen Access
local.identifier.drac27655897
dc.description.versionPostprint (published version)
local.citation.authorde Lozar, A.; Mellado, J. P.
local.citation.publicationNameGeophysical research letters
local.citation.volume42
local.citation.startingPage7223
local.citation.endingPage7229


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