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| Titel |
Relationships between burned area, forest cover loss, and land cover change in the Brazilian Amazon based on satellite data |
| VerfasserIn |
T. Fanin, G. R. Werf |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 20 ; Nr. 12, no. 20 (2015-10-22), S.6033-6043 |
| Datensatznummer |
250118135
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| Publikation (Nr.) |
 copernicus.org/bg-12-6033-2015.pdf |
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| Zusammenfassung |
| Fires are used as a tool in the deforestation process. Yet, the relationship
between fire and deforestation may vary temporally and spatially depending
on the type of deforestation and climatic conditions. This study evaluates
spatiotemporal dynamics of deforestation and fire represented by burned area
over the 2002–2012 period in the Brazilian Legal Amazon. As a first step,
we compared newly available Landsat-based maps of gross forest cover loss
from the Global Forest Change (GFC) project with maps of deforestation
extent from the Amazon Deforestation Monitoring Project (PRODES) produced by
the Brazilian National Institute for Space Research (INPE). As a second
step, we rescaled the Landsat-based data to the 500 m resolution of the
Moderate Resolution Imaging Spectroradiometer (MODIS) burned area data
(MCD64A1) and stratified this using MODIS land cover data to study the role
of burned area in forest cover loss and deforestation. We found that while
GFC forest cover loss and PRODES deforestation generally agreed on spatial
and temporal dynamics, there were several key differences between the
data sets. Both showed a decrease in the extent of forest cover loss or
deforestation after 2004, but the drop was larger and more continuous in
PRODES than in GFC. The observed decrease in forest cover loss or
deforestation rates over our study period was mainly due to lower clearing
rates in the evergreen broadleaf forests in the states of Mato Grosso,
Pará, and Rondônia. GFC indicated anomalously high forest cover loss in
the years 2007 and 2010, which was not reported by PRODES. The burned area data
indicated that this was predominantly related to increased burned area
occurring outside of the tropical forest area during these dry years, mainly
in Pará. This indicated that fire and forest loss dynamics in woodlands
or secondary forests may be equally important as deforestation in regulating
atmospheric CO2 concentrations. In addition to the decrease in forest
cover loss rates, we also found that post-deforestation fire use declined;
burned area within 5 years after forest cover loss decreased from 54 to
39 % during our study period. |
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