@Article{FonsecaAASXXMWA:2017:ClAnDr,
author = "Fonseca, Marisa G. and Anderson, Liana O. and Arai, Egidio and
Shimabukuro, Yosio Edemir and Xaud, Haron A. M. and Xaud,
Maristela R. and Madani, Nima and Wagner, Fabien Hubert and
Arag{\~a}o, Luiz Eduardo Oliveira e Cruz de",
affiliation = "{Tropical Ecosystems and Environmental Sciences Laboratory
(TREES)} and {Centro Nacional de Monitoramento e Alertas de
Desastre Naturais (CEMADEN)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and Embrapa and EMBRAPA and EMBRAPA and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Climatic and anthropogenic drivers of northern Amazon fires during
the 2015–2016 El Ni~no event",
journal = "Ecological Applications",
year = "2017",
volume = "27",
number = "8",
pages = "2514--2527",
keywords = "anthropogenic ignition, climate, fire modeling, hot pixels,
machine learning, multivariate ENSO index, savannas, tropical
forests.",
abstract = "The strong El Nino Southern Oscillation (ENSO) event that occurred
in 2015 ~ 2016 caused extreme drought in the northern Brazilian
Amazon, especially in the state of Roraima, increasing fire
occurrence. Here we map the extent of precipitation and fire
anomalies and quantify the effects of climatic and anthropogenic
drivers on fire occurrence during the 20152016 dry season (from
December 2015 to March 2016) in the state of Roraima. To achieve
these objectives we first estimated the spatial pattern of
precipitation anomalies, based on long-term data from the TRMM
(Tropical Rainfall Measuring Mission), and the fire anomaly, based
on MODIS (Moderate Resolution Imaging Spectroradiometer) active
fire detections during the referred period. Then, we integrated
climatic and anthropogenic drivers in a Maximum Entropy (MaxEnt)
model to quantify fire probability, assessing (1) the model
accuracy during the 20152016 and the 20162017 dry seasons; (2) the
relative importance of each predictor variable on the model
predictive performance; and (3) the response curves, showing how
each environmental variable affects the fire probability.
Approximately 59% (132,900 km2 ) of the study area was exposed to
precipitation anomalies \≤1 standard deviation (SD) in
January and ~48% (~106,800 km2 ) in March. About 38% (86,200 km2 )
of the study area experienced fire anomalies \≥1 SD in at
least one month between December 2015 and March 2016. The distance
to roads and the direct ENSO effect on fire occurrence were the
two most influential variables on model predictive performance.
Despite the improvement of governmental actions of fire prevention
and firefighting in Roraima since the last intense ENSO event
(19971998), we show that fire still gets out of control in the
state during extreme drought events. Our results indicate that if
no prevention actions are undertaken, future road network
expansion and a climate-induced increase in water stress will
amplify fire occurrence in the northern Amazon, even in its humid
dense forests. As an additional outcome of our analysis, we
conclude that the model and the data we used may help to guide
on-the-ground fire-prevention actions and firefighting planning
and therefore minimize fire-related ecosystems degradation,
economic losses and carbon emissions in Roraima.",
issn = "1051-0761",
language = "en",
targetfile = "Fonseca_et_al-2017-Ecological_Applications.pdf",
urlaccessdate = "27 abr. 2024"
}