Multi-year MODIS active fire type classification over the Brazilian Tropical Moist Forest Biome

Roy, David P.; Kumar, Sundeep

doi:10.1080/17538947.2016.1208686

Cited by 35 publications

(19 citation statements)

References 128 publications

(171 reference statements)

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“…This variable is retrieved from the radiance at the 4-μm band of satellite sensors and represents the instantaneous radiative energy that is released from actively burning fires. FRP has been extensively used as a proxy of fire intensity to characterize fire types (Roy & Kumar, 2017;Wooster & Zhang, 2004), fire behaviors (Smith & Wooster, 2005), and fire regimes (Archibald et al, 2013), to predict fire danger (Freeborn et al, 2016), and to investigate interactions among biomass burning, land cover dynamics, and hydrological cycles (Ichoku et al, 2016). More importantly, FRP is related to the rate of biomass combustion (Kaufman et al, 1998;Wooster et al, 2003) and the rate of emissions (Ichoku & Kaufman, 2005), which have been subsequently applied to estimate trace gas and aerosol emissions (Kaiser et al, 2012;Kumar et al, 2011;Vermote et al, 2009;Zhang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Fire Radiative Power Estimates From VIIRS and MODIS Observations

Zhang

Kondragunta

et al. 2018

JGR Atmospheres

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Satellite‐based active fire data are a viable tool to understand the role of global fires in the biosphere and atmosphere. The Moderate Resolution Imaging Spectroradiometer (MODIS) sensors on Aqua and Terra satellites are nearing the end of their lives. The Visible Infrared Imaging Radiometer Suite (VIIRS) sensor on the Suomi National Polar‐orbiting Partnership satellite and the subsequent Joint Polar Satellite System series is expected to extend the MODIS active fire record. Thus, understanding the similarities of and discrepancies between the two data sets during their overlap period is important for existing applications. This study investigated the dependence of the MODIS and VIIRS fire characterization capabilities on satellite view zenith angle and the relationship between the two sensors' fire radiative power (FRP) from individual fire clusters to fire data on continental and global scales. The results indicate that the VIIRS fire characterization capability is similar across swath, whereas MODIS is strongly dependent on view zenith angle. Statistical analyses reveal that the VIIRS and MODIS FRP relationship varies between different spatial scales. In fire clusters, MODIS and VIIRS FRP estimates are very comparable, except for large boreal forest fires where VIIRS FRP is approximately 47% smaller. At the continental scale, the contemporaneous FRP retrievals from MODIS and VIIRS are generally comparable and strongly correlated, but VIIRS FRP is slightly larger and their differences vary across seasons. At global 1° × 1° grids, the FRP difference between the two sensors is, on average, approximately 20% in fire‐prone regions but varies significantly in fire‐limited regions.

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Section: Introductionmentioning

confidence: 99%

Comparison of Fire Radiative Power Estimates From VIIRS and MODIS Observations

Zhang

Kondragunta

et al. 2018

JGR Atmospheres

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“…Fires in the region can be broadly classified as maintenance, deforestation and forest fires with different temporal patterns related to climate conditions, but in some cases they are related to the ignition cause; i.e. maintenance fires in Brazil are lit every 2-4 years (Roy and Kumar, 2017) Fire occurrence in the tropics has a particular pattern: in Latin America it has been established that north of the equator the fire season is between December and February while in the south it is between May and July (Chuvieco et al, 2008). However, unusual fire events have been occurring more frequently and more intensely in the Amazon Basin and are associated with extreme climatic events such as the El Niño Southern Oscillation (ENSO) (Aragão et al, 2007;Ray et al, 2005) or the warm tropical North Atlantic Oscillation (NAO) (Marengo et al, 2008a;Phillips et al, 2009) as well as to the occurrence of extreme drought years (Asner and Alencar, 2010;Brown et al, 2006;Lewis et al, 2011;Malhi et al, 2009;Marengo et al, 2008b).…”

Section: Introductionmentioning

confidence: 99%

Changing patterns of fire occurrence in proximity to forest edges, roads and rivers between NW Amazonian countries

et al. 2017

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Abstract. Tropical forests in NW Amazonia are highly threatened by the expansion of the agricultural frontier and subsequent deforestation. Fire is used, both directly and indirectly, in Brazilian Amazonia to propagate deforestation and increase forest accessibility. Forest fragmentation, a measure of forest degradation, is also attributed to fire occurrence in the tropics. However, outside the Brazilian Legal Amazonia the role of fire in increasing accessibility and forest fragmentation is less explored. In this study, we compared fire regimes in five countries that share this tropical biome in the most north-westerly part of the Amazon Basin (Venezuela, Colombia, Ecuador, Peru and Brazil). We analysed spatial differences in the timing of peak fire activity and in relation to proximity to roads and rivers using 12 years of MODIS active fire detections. We also distinguished patterns of fire in relation to forest fragmentation by analysing fire distance to the forest edge as a measure of fragmentation for each country. We found significant hemispheric differences in peak fire occurrence with the highest number of fires in the south in 2005 vs. 2007 in the north. Despite this, both hemispheres are equally affected by fire. We also found difference in peak fire occurrence by country. Fire peaked in February in Colombia and Venezuela, whereas it peaked in September in Brazil and Peru, and finally Ecuador presented two fire peaks in January and October. We confirmed the relationship between fires and forest fragmentation for all countries and also found significant differences in the distance between the fire and the forest edge for each country. Fires were associated with roads and rivers in most countries. These results can inform land use planning at the regional, national and subnational scales to minimize the contribution of road expansion and subsequent access to the Amazonian natural resources to fire occurrence and the associated deforestation and carbon emissions.

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“…Fire dynamics is strongly influenced by climate, and indeed the dry season (∼ July-September) in the southern Amazonia corresponded to a wet season in northern Amazonia, and this is well established. For example, 2004For example, /2005For example, , 2006For example, /2007For example, and 2009For example, /2010 were El Niño years, affecting the dry season in the Northern Hemisphere, while increased Atlantic sea surface temperatures (SST) in the Atlantic Ocean were responsible for the 2005 and 2010 droughts during the dry season in the Southern Hemisphere (Phillips et al, 2009;Saatchi et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Response to Reviewer Comments

Armenteras¹

2017

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Tropical forests in NW Amazonia are highly threatened by the expansion of the agricultural frontier and subsequent deforestation. Fire is used, both directly and indirectly, in Brazilian Amazonia to propagate deforestation and increase forest accessibility. Forest fragmentation, a measure of forest degradation, is also attributed to fire occurrence in the tropics. However, outside the Brazilian Legal Amazonia the role of fire in increasing accessibility and forest fragmentation is less explored. In this study, we compared fire regimes in five countries that share this tropical biome in the most north-westerly part of the Amazon Basin (Venezuela, Colombia, Ecuador, Peru and Brazil). We analysed spatial differences in the timing of peak fire activity and in relation to proximity to roads and rivers using 12 years of MODIS active fire detections. We also distinguished patterns of fire in relation to forest fragmentation by analysing fire distance to the forest edge as a measure of fragmentation for each country. We found significant hemispheric differences in peak fire occurrence with the highest number of fires in the south in 2005 vs. 2007 in the north. Despite this, both hemispheres are equally affected by fire. We also found difference in peak fire occurrence by country. Fire peaked in February in Colombia and Venezuela, whereas it peaked in September in Brazil and Peru, and finally Ecuador presented two fire peaks in January and October. We confirmed the relationship between fires and forest fragmentation for all countries and also found significant differences in the distance between the fire and the forest edge for each country. Fires were associated with roads and rivers in most countries. These results can inform land use planning at the regional, national and subnational scales to minimize the contribution of road expansion and subsequent access to the Amazonian natural resources to fire occurrence and the associated deforestation and carbon emissions.Published by Copernicus Publications on behalf of the European Geosciences Union.

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Multi-year MODIS active fire type classification over the Brazilian Tropical Moist Forest Biome

Cited by 35 publications

References 128 publications

Comparison of Fire Radiative Power Estimates From VIIRS and MODIS Observations

Comparison of Fire Radiative Power Estimates From VIIRS and MODIS Observations

Changing patterns of fire occurrence in proximity to forest edges, roads and rivers between NW Amazonian countries

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