Heat islands in Teresina-PI: summer episodes

Abstract

Mapping heat islands in evidence in the city of Teresina, capital of the state of Piauí, is the central objective of this work. Combined mobile transects with fixed points were used to measure air temperature, relative air humidity and wind velocity. These measurements were carried out on 03, 05, 07, 10, 12 and 14 March 2013. The data obtained resulted in the preparation of temperature and humidity maps through a Geographic Information System, which allowed the identification of heat islands in several Points of the city. Since a discussion of this nature provokes the analysis of the regional meteorological dynamics to the understanding of the urban atmosphere in the chosen episodes, it was based on synoptic charts provided by the website of the Brazilian Navy and colored images of Goes 12 and 13 satellites of the Center of Weather Forecast and Climate Studies of the National Institute for Space Research. Urban geometry, automotive vehicle pollution, building materials, small water bodies, among others, are exemplified as elements of the teresineses Urban Climate System capable of composing unique mesoclimatic and microclimatic realities. On day 03, for example, the cell and heat island were formed with thermal amplitudes of 6 °C and 4.1 °C, respectively.

Keywords

• ilhas de calor. clima urbano. teresina-pi. transectos móveis. sistema de informação geográfica.