Terrestrial carbon sinks in the brazilian Amazon and Cerrado region predicted from MODIS satellite data and ecosystem modeling
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2009
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A simulation model based on satellite observations
of monthly vegetation cover from the Moderate Resolution
Imaging Spectroradiometer (MODIS) was used to
estimate monthly carbon fluxes in terrestrial ecosystems
of Brazilian Amazon and Cerrado regions over the period
2000–2004. Net ecosystem production (NEP) flux for atmospheric
CO2 in the region for these years was estimated.
Consistently high carbon sink fluxes in terrestrial ecosystems
on a yearly basis were found in the western portions of the
states of Acre and Rondˆonia and the northern portions of the
state of Par´a. These areas were not significantly impacted
by the 2002–2003 El Ni˜no event in terms of net annual carbon
gains. Areas of the region that show periodically high
carbon source fluxes from terrestrial ecosystems to the atmosphere
on yearly basis were found throughout the state
of Maranh˜ao and the southern portions of the state of Amazonas.
As demonstrated though tower site comparisons, NEP
modeled with monthly MODIS Enhanced Vegetation Index
(EVI) inputs closely resembles the measured seasonal carbon
fluxes at the LBA Tapajos tower site. Modeling results
suggest that the capacity for use of MODIS Enhanced Vegetation
Index (EVI) data to predict seasonal uptake rates of
CO2 in Amazon forests and Cerrado woodlands is strong.
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POTTER, C. et al. Terrestrial carbon sinks in the brazilian Amazon and Cerrado region predicted from MODIS satellite data and ecosystem modeling. Biogeosciences Discussions, Göttingen , v. 6, n. 6, p. 937-945, 2009.