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Ana M. B. Nunes and John O. Roads

is not represented in Control ( Figure 2b ), and ERA-40 ( Figure 2d ), or properly by R-2 ( Figure 2c ). At least one episode of SALLJ was documented during the third week of January 1999 by the WETAMC/LBA ( Marengo et al. 2002 ). A cyclonic circulation is also shown over Paraguay, Argentina, and southern Brazil in Figure 12a , to the right of the precipitation core, where moisture is being supplied from the South Atlantic Ocean. A cyclonic pattern can also be seen over the northeastern coast of

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Jeffrey T. Morisette, Louis Giglio, Ivan Csiszar, Alberto Setzer, Wilfrid Schroeder, Douglas Morton, and Christopher O. Justice

). We then describe the binary fire detection algorithm applied to the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) imagery and how the resulting binary fire imagery derived from ASTER, which has 30 m × 30 m spatial resolution, is summarized for comparison with each individual MODIS 1-km pixel. This paper builds upon the previous work of coupled ASTER and EOS MODIS fire detection in southern Africa ( Morisette et al. 2005 ). The corresponding MODIS and summarized ASTER data

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Wilfrid Schroeder, Jeffrey T. Morisette, Ivan Csiszar, Louis Giglio, Douglas Morton, and Christopher O. Justice

widespread use of fire for land management, together with the extensive areas of fire-prone native vegetation. Among these areas, the southern and eastern edges of the Brazilian Amazon, known as the arc of deforestation, together with adjacent cerrado (savanna) areas, have the highest consistent fire counts from satellite data of any region in Brazil every year from June to October ( Prins et al. 1998 ; additional information available online at http://www.cptec.inpe.br/queimadas , or http

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Andrew J. Elmore, Gregory P. Asner, and R. Flint Hughes

using linear regression. Precipitation plays an important role in determining the productivity of grasslands through inputs to soil moisture and through the release of nutrients ( Burke et al. 1998 ). To investigate the influence of precipitation timing on PV, NPV, and substrate cover in the MODIS time series, we acquired and processed monthly precipitation data from the National Oceanic Atmospheric Administration for 23 sites across the dry side of Hawaii. Land-cover values (PV, NPV, and substrate

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