Analysis of Cerrado Physiognomies and Conversion in the MODIS Seasonal - Temporal Domain

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Show simple item record Ratana, Piyachat en_US Huete, Alfredo en_US Ferreira, Laerte en_US
dc.contributor.editor en_US 2010-05-28T09:43:39Z 2010-05-28T09:43:39Z 2005 en_US
dc.identifier 2009001137 en_US
dc.identifier.citation Ratana Piyachat, Huete Alfredo, and Ferreira Laerte 2005, 'Analysis of Cerrado Physiognomies and Conversion in the MODIS Seasonal - Temporal Domain', American Geophysical Union, vol. 9, pp. 1-22. en_US
dc.identifier.issn 1087-3562 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract en_US
dc.description.abstract The ?cerrado? biome in central Brazil is rapidly being converted into pasture and agricultural crops with important consequences for local and regional climate change and regional carbon fluxes between the atmosphere and land surface. Satellite remote sensing provides an opportunity to monitor the highly diverse and complex cerrado biome, encompassing grassland, shrubland, woodland and gallery forests, and converted areas. In this study, the potential of Terra Moderate Resolution Imaging Spectroradiometer (MODIS) data is analyzed to discriminate among these diverse cerrado physiognomies and converted pastures based on their seasonal dynamics and phenology. Four years (2000?03) of MODIS 16-day composited, 250-m resolution vegetation index (VI) data were extracted over a series of biophysically sampled field study sites representing the major cerrado types. The temporal VI profiles over the cerrado formations exhibited high seasonal contrasts with a pronounced dry season from June to August and a wet growing season from November to March. The converted pasture areas showed the highest seasonal contrasts while the gallery forest formation had the lowest contrast. Seasonal VI variations were negatively correlated with woody canopy crown cover and provided a method to discriminate among converted cerrado areas, gallery forests, and the woody and herbaceous cerrado formations. The grassland and shrub cerrado formations, however, were difficult to separate based on their seasonal VI profiles. Maximum discrimination among the cerrado types occurred during the dry season where a positive linear relationship was found between VI and green cover. The annual integrated VI values showed the gallery forests and cerrado woodland as having the highest, and hence most annual productivity, while the more herbaceous shrub and grassland cerrado types were least productive. en_US
dc.language en_US
dc.publisher American Geophysical Union en_US
dc.relation.isbasedon en_US
dc.title Analysis of Cerrado Physiognomies and Conversion in the MODIS Seasonal - Temporal Domain en_US
dc.parent Earth Interactions en_US
dc.journal.volume 9 en_US
dc.journal.number en_US
dc.journal.number 3 en_US
dc.publocation United States en_US
dc.identifier.startpage 1 en_US
dc.identifier.endpage 22 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 040600 en_US
dc.personcode 0000058687 en_US
dc.personcode 108636 en_US
dc.personcode 0000058688 en_US
dc.percentage 100 en_US Physical Geography and Environmental Geoscience en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords en_US
dc.description.keywords Cerrado, MODIS, Phenology, Temporal domain, Remote sensing en_US

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