文章基本信息

标题：ÁREA VERDE COMO OÁSIS TÉRMICO NA REGIÃO METROPOLITANA DE PORTO ALEGRE/RS (A urban forest as thermal oasis in the Metropolitan Area of Porto Alegre/RS)
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作者：Erika COLLISCHONN
期刊名称：Revista ACTA Geográfica
印刷版ISSN：1980-5772
电子版ISSN：2177-4307
出版年度：2012
页码：165-183
DOI：10.5654/actageo2012.0002.0011
出版社：Editora da Universidade Federal de Roraima (EdUFRR)
摘要：In the 1950s, the naturalist Balduino Rambo, anticipating the future of conurbation along the main roads and rail near Porto Alegre/RS, argued that a state tree farm (“horto florestal”) existing in the area was maintained as public green area. In this work we assessed the effect on the same tree farm today, when comparing results of surface temperature mapping obtained by image processing from the Landsat TM5 sattelite, with aerial photographs of the same area and with data from weather stations. We found that, on a summer day, surface temperatures into the “horto-florestal” were 8° C cooler than the surrounding urban industrial areas. Thus, Rambo's prophecies are already a reality, because besides from being a disrruption in the urban-industrial landscape, the “horto-florestal” is an island of freshness in the conurbation of the metropolitan area of Porto Alegre-RS.
关键词：remote sensing; temperature; land cover.