On Adding Thermodynamic Damping Mechanisms to Refine Two Classical Models of Katabatic Winds

Mo, Ruping

doi:https://open-science.canada.ca/handle/123456789/1303

On Adding Thermodynamic Damping Mechanisms to Refine Two Classical Models of Katabatic Winds

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dc.contributor.author: Mo, Ruping
dc.date.accepted: 2013-02-01
dc.date.accessioned: 2023-11-17T20:59:49Z
dc.date.available: 2023-11-17T20:59:49Z
dc.date.issued: 2013-07-01
dc.date.submitted: 2012-09-19
dc.description.abstract - en: The Prandtl and layer-averaged models of katabatic winds contain some nonphysical singularities in the analytical solutions, which give unbounded steady flow anomalies at zero slope angles or adiabatic lapse rates. This study presents some simple refinements of these two classical models, in which the aforementioned singularities are removed when Newtonian cooling and Rayleigh friction are included in the system. It is pointed out that, in the limit of zero slope angles or adiabatic lapse rates, the along-slope buoyancy force and the adiabatic heating caused by air descending approach zero. Under such circumstances, a bounded steady solution for the katabatic winds is impossible unless some damping mechanisms are included to retard the anomalies induced by the radiative cooling effect in the boundary layer. Newtonian cooling and Rayleigh friction are the two simplest thermodynamic damping mechanisms that can be included to balance the effects of eddy viscosity and eddy thermal conductivity in the katabatic-flow model. Physically speaking, the Newtonian cooling term represents a small partition of the radiative effect and the Rayleigh friction term represents an approximation of the bottom drag effect in a turbulent boundary layer.
dc.description.fosrcfull - en: Copyright [2013] American Meteorological Society (AMS). For permission to reuse any portion of this Work, please contact <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Any use of material in this Work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC § 108) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. All AMS journals and monograph publications are registered with the Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Additional details are provided in the AMS Copyright Policy statement, available on the AMS website (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
dc.description.fosrcfull-fosrctranslation - fr: Droit d'auteur [2013] American Meteorological Society (AMS). Pour obtenir l'autorisation de réutiliser toute partie de cette œuvre, veuillez contacter <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Toute utilisation d'un élément de cette œuvre considérée comme une "utilisation équitable" par l'article 107 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 107) ou satisfaisant aux conditions énoncées à l'article 108 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 108) ne requiert pas l'autorisation de l'AMS. La republication, la reproduction systématique, l'affichage sous forme électronique, par exemple sur un site web ou dans une base de données interrogeable, ou toute autre utilisation de ce matériel, à l'exception de ce qui est exempté par la déclaration ci-dessus, nécessite une autorisation écrite ou une licence de la part de l'AMS. Toutes les revues et monographies de l'AMS sont enregistrées auprès du Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Des détails supplémentaires sont prévu dans la déclaration de politique de droit d'auteur de l'AMS, disponible sur le site web de l'AMS (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
dc.identifier.doi: https://doi.org/10.1175/JAS-D-12-0256.1
dc.identifier.issn: 0022-4928; 1520-0469
dc.identifier.uri: https://open-science.canada.ca/handle/123456789/1303
dc.language.iso: en
dc.publisher: American Meteorological Society
dc.rights.openaccesslevel - en: Green
dc.rights.openaccesslevel - fr: Vert
dc.subject - en: Nature and environment; Science and technology; Climate
dc.subject - fr: Nature et environnement; Sciences et technologie; Climat
dc.subject.en - en: Nature and environment; Science and technology; Climate
dc.subject.fr - fr: Nature et environnement; Sciences et technologie; Climat
dc.title - en: On Adding Thermodynamic Damping Mechanisms to Refine Two Classical Models of Katabatic Winds
dc.type - en: Article
dc.type - fr: Article
local.article.journalissue: 7
local.article.journaltitle: Journal of the Atmospheric Sciences
local.article.journalvolume: 70
local.pagination: 2325–2334
local.peerreview - en: Yes
local.peerreview - fr: Oui
local.requestdoi: No

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