Ilhas de calor urbanas no Nordeste brasileiro: uma avaliação com base em imagens de satélite.

Abstract

The growing urbanization process has consequences the local climate and interfere negatively in the urban environmental quality. The main objective of this study was to estimate and to analyze Urban Heat Island magnitude (UHI) in six cities of the Brazilian northeast region, for the period 2006 - 2010. The surface temperatures was obtained by meteorological satellite images and then compared with the data obtained in PDC (Platform Data Collection). The study was carried out to the cities of Campina Grande and Patos, both in state of Paraíba, Recife and Petrolina in state of Pernambuco, as well as in Pão de Açúcar and Maceió, both in state of Alagoas. In addition, it was collected data in relative humidity, air temperature and surface temperature through a thermohygrometer device, in the period November/December 2015 in order to compare satellite surface data with that collected in the PDCs. The satellite images were handled by the ERDAS 2014 program and the maps were obtained using QuantumGIS 2.8.2 program. The results show that the trend of the surface temperature is increased, due to changes in the urban microclimate. The UHIM intensity was most striking during the period 2006-2010 in Maceió, followed by the cities of Recife, Patos, Pão de Açúcar, Petrolina and Campina Grande. Based on the analysis of the surface temperatures from satellite and PDCs we can to conclude that surface temperature can be obtained by satellite images with correlation coefficient statistically significant.