The Amazon frontier of land-use change : croplands and consequences for greenhouse gas emissions
Galford, Gillian L.
Melillo, Jerry M.
Mustard, John F.
Cerri, Carlos E. P.
Cerri, Carlos C.
MetadataShow full item record
The Brazilian Amazon is one of the most rapidly developing agricultural frontiers in the world. The authors assess changes in cropland area and the intensification of cropping in the Brazilian agricultural frontier state of Mato Grosso using remote sensing and develop a greenhouse gas emissions budget. The most common type of intensification in this region is a shift from single- to double-cropping patterns and associated changes in management, including increased fertilization. Using the enhanced vegetation index (EVI) from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor, the authors created a green-leaf phenology for 2001–06 that was temporally smoothed with a wavelet filter. The wavelet-smoothed green-leaf phenology was analyzed to detect cropland areas and their cropping patterns. The authors document cropland extensification and double-cropping intensification validated with field data with 85% accuracy for detecting croplands and 64% and 89% accuracy for detecting single- and double-cropping patterns, respectively. The results show that croplands more than doubled from 2001 to 2006 to cover about 100 000 km2 and that new double-cropping intensification occurred on over 20% of croplands. Variations are seen in the annual rates of extensification and double-cropping intensification. Greenhouse gas emissions are estimated for the period 2001–06 due to conversion of natural vegetation and pastures to row-crop agriculture in Mato Grosso averaged 179 Tg CO2-e yr−1, over half the typical fossil fuel emissions for the country in recent years.
Author Posting. © American Meteorological Society, 2010. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Earth Interactions 14 (2010): 1–24, doi:10.1175/2010EI327.1.
Suggested CitationEarth Interactions 14 (2010): 1–24
Showing items related by title, author, creator and subject.
Galford, Gillian L.; Melillo, Jerry M.; Kicklighter, David W.; Mustard, John F.; Cronin, Timothy W.; Cerri, Carlos E. P.; Cerri, Carlos C. (Ecological Society of America, 2011-04)Tropical ecosystems play a large and complex role in the global carbon cycle. Clearing of natural ecosystems for agriculture leads to large pulses of CO2 to the atmosphere from terrestrial biomass. Concurrently, the remaining ...
Density currents in the Chicago River : characterization, effects on water quality, and potential sources Jackson, P. Ryan; Garcia, Carlos M.; Oberg, Kevin A.; Johnson, Kevin K.; Garcia, Marcelo H. (2008-03)Bidirectional flows in a river system can occur under stratified flow conditions and in addition to creating significant errors in discharge estimates, the upstream propagating currents are capable of transporting contaminants ...
Hayes, Jorden L.; Holbrook, W. Steven; Lizarralde, Daniel; Van Avendonk, Harm J. A.; Bullock, Andrew D.; Mora, Mauricio M.; Harder, Steven H.; Alvarado, Guillermo E.; Ramirez, Carlos J. (John Wiley & Sons, 2013-04-29)Island arcs are proposed to be essential building blocks for the crustal growth of continents; however, island arcs and continents are fundamentally different in bulk composition: mafic and felsic, respectively. The substrate ...