期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 7B
页码：523-529
出版社：Copernicus Publications
摘要：Land cover plays a major role in many biogeochemical models that represent processes and connections withterrestrial systems; hence, it is a key component for public decisions in ecosystems management. The advance of remote sensingtechnology, combined with the emergence of new operational products, offers alternatives to improve the accuracy of environmentalmonitoring and analysis. This work uses four remotely sensed databases: the GLOBCOVER, the Vegetation Continuous Field(VCF), MODIS Fire Radiative Power (FRP) and the Tropical Rainfall Measuring Mission (TRMM). The objective of this study is toanalyze the environmental characteristics in South America from 2000 to 2005 using these four remotely sensed databases. Initially,GLOBCOVER was assessed based on VCF product, and was afterwards analyzed for its quantitative and spatial distribution of thefires with the FRP database. The results show that GLOBCOVER has a tendency to overestimate forest classes and to underestimateurban and mangroves areas. The fire quantification on GLOBCOVER product shows that the highest incidence of fires can beobserved in the deforestation arc, located in the Amazon forest border, with vegetation cover composed mainly of broadleavedevergreen or semi-deciduous forest. A time series analysis of FRP database indicates that biomass burning spreads to areas ofbroadleaved evergreen or semi-deciduous forest and savannah regions, even with rainfall anomalies observed with TRMM database.We suggest to improve the map of vegetation and urban areas and to use other products derived from satellites, such as the images ofCity Lights, created out of data from the Defence Meteorological Satellite Program (DMSP).
关键词：Land use; land cover; GLOBCOVER; vegetation cover fraction; fire radiative power; biomass burning
