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The Relationship between Meteorological Variables and Clearness Index for Four Urban/Suburban Areas of Brazilian Cities
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作者 Francisco Jose Duarte Gomes Luciana Sanches +3 位作者 Marcelo de Carvalho Alves marta cristina de jesus Albuquerque Nogueira Jose de Souza Nogueira 《Journal of Environmental Science and Engineering(B)》 2012年第7期890-900,共11页
This study aimed to examine the relationship between meteorological variables and the clearness index for three sites in Cuiaba city and one site in Chapada dos Guimaraes city, Brazil during 2007. It described the mic... This study aimed to examine the relationship between meteorological variables and the clearness index for three sites in Cuiaba city and one site in Chapada dos Guimaraes city, Brazil during 2007. It described the microclimate of each site on the basis of constructive elements and their surroundings, considering sky coverage using a daily clearness index. The results were that micrometeorological values were influenced by the natural elements and construction within the surrounding site, with higher air temperatures in more urbanized areas and sites with high diffuse radiation. When determining the sky coverage, on average, the days were partly cloudy or cloudy due to two reasons: (a) during the wet season, rainfall created cloudy conditions and (b) during the dry season, increases of particulates in the atmosphere as a result of anthropogenic emissions of gases and aerosols in this region of the state resulted in sky conditions classified as partly cloudy and cloudy. Future research should aim to better quantify the measurements taken inside an urban area, considering the topography and vegetation cover. This will improve the models that support urban planning, therefore favoring the thermal comfort of areas already occupied or to be urbanized. 展开更多
关键词 Tropical climate urban climate cover sky microclimate.
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