HR: 0800h
AN: NS31B-03    [Abstracts]
TI: Spatial and temporal vegetation change in Southern Brazilian Amazon using GIS and NOAA /AVHRR data
AU: Kazadi, S
EM: sanga@bio.mie-u.ac.jp
AF: Graduate School of Bioresources, Mie University, 1577 Kurima-Machiya, TSU, MIE 514- 8507, Japan
AU: * YOSHIKAWA, S
EM: sayajo@gmail.com
AF: Graduate School of Bioresources, Mie University, 1577 Kurima-Machiya, TSU, MIE 514- 8507, Japan
AB: Over the past two decades, environmental alteration in the Amazon Basin due to land development, population increase, and the consequent deforestation, has become a serious ecological problem in this region known to be, both climatologically and biogenetically, one of the most important regions in the world. In Mato Grosso, the Brazilian state with the highest deforestation rate, vegetation cover change has been reported to occur over large areas due to the introduction of large-scale mechanized agriculture, extensive cattle ranching and slash-and-burn cultivation. Spatial and temporal land cover (vegetation) change is noted to potentially set up temperature increase and rainfall decrease. We stress on the importance of vegetation change information as crucial inputs for eco-climatic analysis of these spatial patterns of change and their temporal trend at local scale, as well as for real-time monitoring or detection of the deforestation events for appropriate action by the Brazilian government. In this study, Principal Component Analysis (PCA) is performed onto NOAA AVHRR remote-sensed and multi- spectral data covering the 1981-2003 period, using GIS. Our investigation focuses on developing a vegetation quantification algorithm for change detection in the vegetation cover over every few years, using the PCA first component, which is shown to characterize the overall vegetation cover types. Land cover features and their spatio-temporal change over the Southern Brazilian Amazon are analyzed and discussed, and their relationships with global and regional eco-climatic phenomena is highlighted.
UR: http:www.agu.org/sanga1
DE: 0480 Remote sensing
DE: 1631 Land/atmosphere interactions (1218, 1843, 3322)
DE: 1632 Land cover change
SC: Near-Surface Geophysics [NS]
MN: 2007 Joint Assembly