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Spatial and temporal distribution of urban heat islands

2017; Elsevier BV; Volume: 605-606; Linguagem: Inglês

10.1016/j.scitotenv.2017.05.275

1879-1026

Alexandre Rosa dos Santos, Felício Santos de Oliveira, Aderbal Gomes da Silva, José Marinaldo Gleriani, Wantuelfer Gonçalves, Giselle Lemos Moreira, Felipe Gimenes Silva, Elvis Ricardo Figueira Branco, Marks Melo Moura, Rosane Gomes da Silva, Ronie Silva Juvanhol, Kaíse Barbosa de Souza, Carlos Antônio Álvares Soares Ribeiro, Vagner Tebaldi de Queiroz, Adílson Vidal Costa, Alexandre Simões Lorenzon, Getúlio Fonseca Domingues, Gustavo Eduardo Marcatti, Nero Lemos Martins de Castro, Rafael Tassinari Resende, Duberlí Geomar Elera Gonzáles, Lucas Arthur de Almeida Telles, Thaisa Ribeiro Teixeira, Gleissy Mary Amaral Dino Alves dos Santos, Pedro Henrique Santos Mota,

Land Use and Ecosystem Services

The formation of an urban heat island (UHI) is one of the most common impacts of the urbanization process. To mitigate the effects of UHI, the planning of urban forests (e.g., creation of parks, forests and afforestation streets) has been the major tool applied in this context. Thus, the aim of this study is to evaluate the spatial and temporal distribution of heat islands in Vila Velha, ES, Brazil using the mono-window algorithm. The study followed these methodological steps: 1) mapping of urban green areas through a photointerpretation screen; 2) application of the mono-window algorithm to obtain the spatial and temporal patterns of land surface temperature (LST); 3) correlation between LST and the normalized difference vegetation index (NDVI) and normalized difference build-up index (NDBI); 4) application of ecological evaluation index. The results showed that the mean values of LST in urban areas were at least 2.34 to 7.19 °C higher than undeveloped areas. Moreover, the positive correlation between LST and NDBI showed an amplifying effect of the developed areas for UHI, while areas with a predominance of vegetation attenuated the effect of UHI. Urban centers, clustered in some parts of the city, received the worst ecological assessment index. Finally, the adoption of measures to guide the urban forest planning within urban centers is necessary to mitigate the effect of heat islands and provide thermal comfort in urban areas.