Andrews Jose De Lucena,Eduardo Barbosa Correa,Otto Corrêa Rotunno Filho,Leonardo de Faria Peres,José Ricardo de Almeida França,Maria Gertrudes Alvarez Justi da Silva, COPPE / UFRJ, , lucenageo@yahoo.com.br
Abstract
Heat islands are a phenomenon of urban areas where the air temperature and surface temperature are much hotter than the surrounding environment, characterized as a serious environmental problem. These cores with higher temperatures are due to significant changes in energy and water budget for the city and they are still responsible for generating and aggravating situations of thermal discomfort and of extreme rainfall events and disasters. This paper aims to map the heat islands in the metropolitan region of Rio de Janeiro (RMRJ) and to present the corresponding relationship with rainfall events. Remote sensing imagery data, meteorological modeling and synoptic maps are used. In addition, algorithms for conversion of brightness temperature on surface temperature and spatial techniques to correlate heat islands to rainfall are adopted. The results allow to identify that the hottest areas of urban regions favour the increase of urban precipitation.
Palavras-chave: ilhas de calor; sensoriamento remoto; modelagem atmosférica.