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Use of Infrared Images in the Delimitation of Sao Paulo's Heat Island,
INSTITUTO DE PESQUISAS ESPACIAIS SAO JOSE DOS CAMPOS (BRAZIL)
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The objective of this work is to describe a way of using remote sensing techniques to delimit and characterize an urban heat island. The study was carried out in metropolitan Sao Paulo. One can make a thermal mapping of an urban heat island by measuring temperatures in situ or by remote sensing. Since in loco measurements in a big city require considerable experimental resources, remote sensing by satellites maybe best option when it is necessary to take extensive and repetitive measurement. The technique used in this work is similar to that used by CHAHINE to derive ocean temperature from infrared images. The method was used to analyse a TIROS-N NOAA 7 image taken on July 16, 1981, 547 PM. On this day the atmoshperic conditions were propitious for the formation of a heat island in Sao Paulo. Through this example, one can conclude that infrared images can be useful in the definition and characterization of an urban heat island.
APPROVED FOR PUBLIC RELEASE