Exploring the relationship between urban form, land surface temperature and vegetation indices in a subtropical megacity

Autor(es)

Ferreira, Luciana Schwandner ^[1] ; Silva Duarte, Denise Helena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, FAU, Sch Architecture & Urbanism, Rua Lago, 876 Cidade Univ, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: URBAN CLIMATE; v. 27, p. 105-123, MAR 2019.
• Citações Web of Science: 2

Resumo

Understanding the influence of different urban forms in the local microclimate can inform architects and urban planners towards a climate-sensitive design approach. Land surface temperature (LST) is an important parameter of the microclimate conditions and can be freely and globally accessed through satellite images. This study explores the relationship between daytime and nighttime Aqua/MODIS LST and the urban morphology defined by local climate zones (LCZ) in accordance with the World Urban Database and Access Portal Tool (WUDAPT) methodology. The vegetation cover from each LCZ was analyzed by the Normalized Difference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI). Additionally, the geometric and surface properties of LCZs defined by the literature were tested against measured LSTs to explorer if expected correlations between surface properties and surface temperature could be found. The results show a strong negative correlation between LST and both NDVI and EVI. Generally, the LCZ classes with lower vegetation cover presented higher daytime and nighttime LST. Building surface fraction and impervious surfaces presented a positive correlation with nighttime LST and the pervious surface fraction presented a negative correlation with nighttime LST. (AU)

• Processo FAPESP: 15/17360-5 - O impacto da supressão da vegetação no microclima urbano: acoplamento de estudos de sensoriamento remoto e de solo. Subsídios para o planejamento da vegetação urbana.
• Beneficiário: Luciana Schwandner Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/02825-5 - O papel do planejamento, do desenho urbano e do projeto de edifícios na adaptação à mudança do clima na microescala: contribuições a uma abordagem interdisciplinar
• Beneficiário: Denise Helena Silva Duarte
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular