The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil

dc.contributor.authorMachado, Antonio Jaschke [UNESP]
dc.contributor.authorColomer, V
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-04T12:39:57Z
dc.date.available2019-10-04T12:39:57Z
dc.date.issued2018-01-01
dc.description.abstractThis paper seeks to identify a pattern of air turbulence that reflects the effect of buildings on air turbulence characteristics measured in open spaces in Western Sao Paulo State, Brazil. Atmospheric turbulence was estimated using high frequency observations of the three orthogonal wind components (u, v, w). A CSAT3 sonic anemometer from Campbell Scientific Inc. (CSI) was deployed on the roof of a building, and the turbulent components (u', v', w') were systematically measured and recorded at 0.1 s and 5 min intervals, respectively, over 100 days between the end of summer (March 2015) and beginning of winter (July 2015) with a CR3000 automatic data acquisition system (CSI). The data analysis took into account the diurnal and nocturnal variability of the turbulence, and the experimental results revealed the existence of a daily vertical circulation pattern. The w component varied between 15 and 45 cm.s-1 on average, and the turbulent fluctuations observed indicated that an ascending component with a speed of up to 1 m.s-1 predominated during the middle of the day and early afternoon. Throughout the night until the early hours of the morning, a less robust, subsiding component with a speed of up to 0.5 m.s-1 was observed. The mean horizontal flow (u, v) was low-speed (around 1 m.s-1) and predominantly from the southeast. There was a consistent change in the direction of this wind, which changed to easterly during the morning as the ascending branch developed. We propose a model for air circulation close to the surface in which this change in direction of the wind is the main effect of the building on the observed turbulence.en
dc.description.affiliationSao Paulo State Univ UNESP, Dept Geog, Fac Sci & Technol, Presidente Prudente, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ UNESP, Dept Geog, Fac Sci & Technol, Presidente Prudente, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2011/08520-8
dc.format.extent1211-1221
dc.identifierhttp://dx.doi.org/10.4995/ISUF2017.2017.4832
dc.identifier.citation24th Isuf International Conference: City And Territory In The Globalization Age. Valencia: Univ Politecnica Valencia, p. 1211-1221, 2018.
dc.identifier.doi10.4995/ISUF2017.2017.4832
dc.identifier.urihttp://hdl.handle.net/11449/185941
dc.identifier.wosWOS:000476920100118
dc.language.isoeng
dc.publisherUniv Politecnica Valencia
dc.relation.ispartof24th Isuf International Conference: City And Territory In The Globalization Age
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectBuilt environment
dc.subjectsonic anemometer
dc.subjectatmospheric turbulence
dc.subjectopen spaces
dc.titleThe effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazilen
dc.typeTrabalho apresentado em evento
dcterms.rightsHolderUniv Politecnica Valencia
unesp.author.lattes5351444612246849[1]
unesp.author.orcid0000-0002-2658-1718[1]
unesp.departmentGeografia - FCTpt

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