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Urban climate and clues of heat island events in the metropolitan area of Rio de Janeiro |
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| Authors: | Andrews José de Lucena Otto Corrêa Rotunno Filho José Ricardo de Almeida França Leonardo de Faria Peres Luciano Nóbrega Rodrigues Xavier |
| Institution: | 1. Laboratório de Recursos Hídricos e Meio Ambiente, Programa de Engenharia Civil, Instituto Alberto Luiz Coimbra de Pós-Gradua??o e Pesquisa em Engenharia, Universidade Federal do Rio de Janeiro, Caixa Postal 68540, 21945-970, Rio de Janeiro, RJ, Brazil 4. Departamento de Geociências, Instituto de Agronomia, Universidade Federal Rural do Rio de Janeiro, BR-465, Km 7, 23890-000, Seropédica, RJ, Brazil 2. Departamento de Meteorologia, Instituto de Geociências (IGEO), Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 274, CCMN (Bloco G), Campus Ilha do Fund?o—Cidade Universitária, 21949-900, Rio de Janeiro, RJ, Brazil 3. Centro de Pesquisa em Energia Elétrica (CEPEL), Avenida Horácio de Macedo, 354., Cidade Universitária, 21941-911, Rio de Janeiro, RJ, Brazil |
| Abstract: | This paper aims to map the thermal field in the metropolitan region of Rio de Janeiro (MARJ) considering the atmospheric characteristics and the land use that contribute to understanding the urban heat island. Three thermal maps are defined through the use of Landsat5-TM satellite images for three winter events chosen for the decades of 1980, 1990, and 2000, respectively. The results reveal a concentration of warmer cores in urban central areas as well as some local warmer areas in suburban region. Sites with lower temperatures correspond to vegetated areas which are away from the central part of the MARJ, including points of suburban areas. This work emphasizes the importance of the combined analysis of surface temperature with land use and atmospheric conditions, depicting a distinct pattern of heat islands for tropical climate. |
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