Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2017-90
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
08 Mar 2017
Review status
This discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Analysis of fire dynamics in the Brazilian savannas
Guilherme Augusto Verola Mataveli1, Maria Elisa Siqueira Silva1, Gabriel Pereira1,2, Francielle da Silva Cardozo2, Fernando Shinji Kawakubo1, Gabriel Bertani3, Julio Cezar Costa2, Raquel de Cássia Ramos2, and Viviane Valéria da Silva2 1Department of Geography, University of São Paulo, São Paulo, 05508-000, Brazil
2Department of Geosciences, Federal University of São João del-Rei, São João del-Rei, 36307-352, Brazil
3Remote Sensing Division, National Institute for Space Research, São José dos Campos,12227-010, Brazil
Abstract. Wildfires play a key role in the ecology of savannas. The Brazilian savannas (Cerrado biome), where the extension of burned areas and amount of fires can be more numerous than in the Amazon, is frequently burned due to natural fires or land-use and land-cover (LULC) changes. Thus, we aimed to understand the occurrence and the dynamics of fires in the Cerrado using active fire, burned area, precipitation, vegetation condition, estimated using the Vegetation Condition Index (VCI), and LULC data derived from orbital sensors. Results show that the Cerrado was, respectively, the second and first Brazilian biome for the occurrence of hotspots and burned area, which are concentrated during the dry season (May to September), especially in September, when the annual deficit in precipitation and extreme vegetation conditions reached maximum indices. Higher densities of hotspots concentrated in the Northern of the biome, while 75 % of the occurrences were found in the natural remnants of the Cerrado. Totals of hotspots and burned area were higher in years of lower precipitation, such as 2007 and 2010. Spatial correlations showed that hotspots and burned area are better correlated with precipitation than vegetation condition, especially in the Central North and Northeast of the Cerrado.

Citation: Mataveli, G. A. V., Silva, M. E. S., Pereira, G., da Silva Cardozo, F., Kawakubo, F. S., Bertani, G., Costa, J. C., de Cássia Ramos, R., and da Silva, V. V.: Analysis of fire dynamics in the Brazilian savannas, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2017-90, in review, 2017.
Guilherme Augusto Verola Mataveli et al.
Guilherme Augusto Verola Mataveli et al.
Guilherme Augusto Verola Mataveli et al.

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