Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/2473
Título: Caracterização do regime do fogo na Guiné-Bissau. Influência antropogénica
Autor: Melo, Joana Lisboa Brandão
Orientador: Pereira, José Miguel Cardoso
Palavras-chave: fire regime
savanna
Guiné-Bissau
regime do fogo
savana
Data de Defesa: 2010
Resumo: Africa is the single largest continental source of greenhouse gases emissions resulting from biomass burning. This study acknowledges the generally agreed opinion that the occurrence of fires on West Africa savannas is mainly influenced by human factors. It also provides insights into the physical, climatic, and human drivers of fire and their relative importance across Guinea-Bissau. Each cause of fire has a unique spatial and temporal distribution with its own consequences for fire regime in Guinea-Bissau. Satellite remote sensing techniques provide the only realistic means of obtaining fire information at a national scale, thus ensuring consistency in the observation with the possibility of spatially explicit and continuous sampling of the same territory. This work uses 1-km MODIS active fire and burned area products, from 2001 to 2008, supplemented with Landsat data, to describe the fire regime in Guinea-Bissau. Detailed and current information concerning the location and extent of the burnt areas is provided. A high frequency of “early fires”, from bushfires, and “late fires”, predominantly associated with agricultural areas, were identified. This pattern is not present in the entire length of the country and depends heavily on cultural factors - dominant ethnic group. It was estimated a large inter-regional variability in area burned but a pervasive pattern of decrease in area burned in the early dry season and an increase at the end of it.
Descrição: Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/2473
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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