Azaneu, Andre Luiz de Souza

de Oliveria, Lawrence Nóbrega

de Paiva, Yuri Roberta Yamaguchi

Ramos, Rossano Marchetti

English

Portal de Revistas do ICMBio (Instituto Chico Mendes de Conservação da Biodiversidade)

Location, temporal tendency 
Biodiversidade Brasileira, 10(1): 91, 2020 Instituto Chico Mendes de Conservação da Biodiversidade 
 
 
91 
 
Location, temporal tendency between 2003 e 2018 and relationship 
with deforestation 
 
 
Rossano Marchetti Ramos1*, Lawrence Nóbrega de Oliveira1, Yuri Roberta Yamaguchi de Paiva1, 
Andre Luiz de Souza Azaneu1 
 
 
1 Instituto Brasileiro de Meio Ambiente e Recursos Naturais Renováveis (Ibama), Brasília, Brasil 
*e-mail: rossano.ramos@ibama.gov.br  
 
 
 
 
ABSTRACT – In Amazon, the areas known as “Arc of deforestation” concentrate much of 
the Brazilian wildfires. The deforestation and forest degradation by fires are two of the 
processess that cause most of Brazilian greenhouse gas emissions. Although the estimates 
of emissions from deforestation are better known, those resulting from forest degradation 
are less accurate as it depends on monitoring the later trajectory of areas affected by fires. 
Understanding this temporal and spatial dynamics is a key issue for public policy actions 
and for better estimating greenhouse emissions. 
The objective of this study was to evaluate the Amazon sites where the active fires 
concentrated between 2003 and 2018, the changes in these areas of fire concentration and 
the relationship of wildfires and deforestation. We used MODIS active fires dataset 
(afternoon data of AQUA satellite). We quantified the annual frequency of active fires in 
each cell of a squared grid (side = 0.5o) to highlight areas of concentration and analyzed 
the tendency for increase or decrease in each cell using the Pearson Correlation. To identify 
land use and land cover we used data produced by MapBiomas (http://mapbiomas.org/).  
The concentration of active fires was associated with economic (expansion of the 
agricultural frontier), climatic processes (new areas of the Amazon started to burn), and 
detection of active fires (suggesting that the detectin probability is not evenly distributed 
among the vegetation types). The temporal dynamics seems to be associated with economic 
processes, especially with the advance of the agricultural frontier and the consolidation of 
grain production in areas that have been deforested for a longer time. The Amazon 
agricultural frontier concentrates most of the active fires and there is a tendency of 
“migration” of the fires to the north, following the agricultural frontier. We found tendency 
of reduction fire counts in the consolidated deforestation areas across entire Deforestation 
Arc and a tendency of increase in more preserved forest cover areas near agricultural 
frontier. When evaluated on a detail scale, the active fires tend to be located in forested 
areas, close to deforested patches. 
 
Keywords: forest fires, active fires, MODIS, Amazon 
 


Location, temporal tendency between 2003 e 2018 and relationship with deforestation

https://www.icmbio.gov.br/revistaeletronica/index.php/BioBR/article/download/1588/1097

Location, temporal tendency between 2003 e 2018 and relationship with deforestation

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