Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas
In the Brazilian savannas (Cerrado biome) fires are natural and a tool for shifting land use; therefore, temporal and spatial patterns result from the interaction of climate, vegetation condition and human activities. Moreover, orbital sensors are the most effective approach to establish patterns...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-01-01
|
| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | https://www.nat-hazards-earth-syst-sci.net/18/125/2018/nhess-18-125-2018.pdf |
| _version_ | 1818928945063526400 |
|---|---|
| author | G. A. V. Mataveli M. E. S. Silva G. Pereira G. Pereira F. da Silva Cardozo F. S. Kawakubo G. Bertani J. C. Costa R. de Cássia Ramos V. V. da Silva |
| author_facet | G. A. V. Mataveli M. E. S. Silva G. Pereira G. Pereira F. da Silva Cardozo F. S. Kawakubo G. Bertani J. C. Costa R. de Cássia Ramos V. V. da Silva |
| author_sort | G. A. V. Mataveli |
| collection | DOAJ |
| description | In the Brazilian savannas (Cerrado biome) fires are natural and a tool for
shifting land use; therefore, temporal and spatial patterns result from the
interaction of climate, vegetation condition and human activities. Moreover,
orbital sensors are the most effective approach to establish patterns in the
biome. We aimed to characterize fire, precipitation and vegetation condition
regimes and to establish spatial patterns of fire occurrence and their
correlation with precipitation and vegetation condition in the Cerrado. The
Cerrado was first and second biome for the occurrence of burned areas (BA)
and hotspots, respectively. Occurrences are higher during the dry season and
in the savanna land use. Hotspots and BA tend to decrease, and concentrate in
the north, but more intense hotspots are not necessarily located where
concentration is higher. Spatial analysis showed that averaged and summed
values can hide patterns, such as for precipitation, which has the lowest
average in August, but minimum precipitation in August was found in 7 %
of the Cerrado. Usually, there is a 2–3-month lag between minimum
precipitation and maximum hotspots and BA, while minimum VCI and maximum
hotspots and BA occur in the same month. Hotspots and BA are better
correlated with VCI than precipitation, qualifying VCI as an indicator of the
susceptibility of vegetation to ignition. |
| first_indexed | 2024-12-20T03:36:58Z |
| format | Article |
| id | doaj.art-6979ab1db1e74c6abebbe4fc367c72a7 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-20T03:36:58Z |
| publishDate | 2018-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-6979ab1db1e74c6abebbe4fc367c72a72022-12-21T19:54:50ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812018-01-011812514410.5194/nhess-18-125-2018Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannasG. A. V. Mataveli0M. E. S. Silva1G. Pereira2G. Pereira3F. da Silva Cardozo4F. S. Kawakubo5G. Bertani6J. C. Costa7R. de Cássia Ramos8V. V. da Silva9Department of Geography, University of São Paulo, São Paulo, 05508-000, BrazilDepartment of Geography, University of São Paulo, São Paulo, 05508-000, BrazilDepartment of Geography, University of São Paulo, São Paulo, 05508-000, BrazilDepartment of Geosciences, Federal University of São João del-Rei, São João del-Rei, 36307-352, BrazilDepartment of Geosciences, Federal University of São João del-Rei, São João del-Rei, 36307-352, BrazilDepartment of Geography, University of São Paulo, São Paulo, 05508-000, BrazilRemote Sensing Division, National Institute for Space Research, São José dos Campos,12227-010, BrazilDepartment of Geosciences, Federal University of São João del-Rei, São João del-Rei, 36307-352, BrazilDepartment of Geosciences, Federal University of São João del-Rei, São João del-Rei, 36307-352, BrazilDepartment of Geosciences, Federal University of São João del-Rei, São João del-Rei, 36307-352, BrazilIn the Brazilian savannas (Cerrado biome) fires are natural and a tool for shifting land use; therefore, temporal and spatial patterns result from the interaction of climate, vegetation condition and human activities. Moreover, orbital sensors are the most effective approach to establish patterns in the biome. We aimed to characterize fire, precipitation and vegetation condition regimes and to establish spatial patterns of fire occurrence and their correlation with precipitation and vegetation condition in the Cerrado. The Cerrado was first and second biome for the occurrence of burned areas (BA) and hotspots, respectively. Occurrences are higher during the dry season and in the savanna land use. Hotspots and BA tend to decrease, and concentrate in the north, but more intense hotspots are not necessarily located where concentration is higher. Spatial analysis showed that averaged and summed values can hide patterns, such as for precipitation, which has the lowest average in August, but minimum precipitation in August was found in 7 % of the Cerrado. Usually, there is a 2–3-month lag between minimum precipitation and maximum hotspots and BA, while minimum VCI and maximum hotspots and BA occur in the same month. Hotspots and BA are better correlated with VCI than precipitation, qualifying VCI as an indicator of the susceptibility of vegetation to ignition.https://www.nat-hazards-earth-syst-sci.net/18/125/2018/nhess-18-125-2018.pdf |
| spellingShingle | G. A. V. Mataveli M. E. S. Silva G. Pereira G. Pereira F. da Silva Cardozo F. S. Kawakubo G. Bertani J. C. Costa R. de Cássia Ramos V. V. da Silva Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas Natural Hazards and Earth System Sciences |
| title | Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas |
| title_full | Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas |
| title_fullStr | Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas |
| title_full_unstemmed | Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas |
| title_short | Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas |
| title_sort | satellite observations for describing fire patterns and climate related fire drivers in the brazilian savannas |
| url | https://www.nat-hazards-earth-syst-sci.net/18/125/2018/nhess-18-125-2018.pdf |
| work_keys_str_mv | AT gavmataveli satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT messilva satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT gpereira satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT gpereira satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT fdasilvacardozo satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT fskawakubo satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT gbertani satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT jccosta satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT rdecassiaramos satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas AT vvdasilva satelliteobservationsfordescribingfirepatternsandclimaterelatedfiredriversinthebraziliansavannas |