FATORES ASSOCIADOS AO DESEMPENHO TÉRMICO E ENERGÉTICO DE SUPERFÍCIE URBANAS

Abstract

New technologies to address the impacts of global climate change are needed to mitigate greenhouse gas emissions and adapt cities to rising temperatures on the planet. The moment calls for government action to incorporate new urban policies to improve the thermal and energy performance of cities and buildings through the design of a resilient urban infrastructure adapted to the heat and directed to promote sustainability with minimal environmental impact. The objective of this research is to provide information for the development of urban planning parameters that can produce negative feedback from the urban climate system through the implementation of passive solar technologies designed to cool surfaces. The methodology considers the use of Landsat-8 satellite images to estimate and map the spectral characteristics that influence the urban energy balance (albedo, emissivity, vegetation cover fraction and normalized water difference index). It was adopted the discretization of the study area in cells of 60 x 60 meters and carried out exploratory analyzes to promote diagnoses aiming to better represent the microclimatic conditions. Preliminary results for January 2019 indicate that the method used can provide diagnoses and identify factors that modulate the thermal and energy efficiency of a given location affecting the urban climate. Future work will expand the data set, with image analysis in other years and months, to incorporate seasonal climatic variations and extreme events, considering that the strategies for new urban policies should include adaptations to the local climate and its variations.