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Ana M. B. Nunes and John O. Roads

1. Introduction During the past several years, reanalysis products have provided many large-scale meteorological fields that are not only useful for validating coarse-scale climate models, but can also be used as forcing for various regional application models (e.g., hydrologic models). These reanalysis products have been subject to much evaluation, and, unfortunately, precipitation and associated hydrologic products remain problematic. Reanalysis precipitation is classified as a C variable

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

conditions for the development of major fire events, such as the great Roraima forest fire in February–March 1998 ( Cochrane and Schulze 1998 ; Elvidge et al. 2001 ; Phulpin et al. 2002 ). The Amazon region experiences approximately 70% of the total annual number of fires detected through satellite imagery in Brazil (see information online at http://www.cptec.inpe.br/queimadas , or http://www.dpi.inpe.br/proarco/bdqueimadas ). Increasing human forcing contributes additional pressure to the

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Lydia P. Olander, Mercedes M. Bustamante, Gregory P. Asner, Everaldo Telles, Zayra Prado, and Plínio B. Camargo

. Nutrients in the bole wood of the mature harvest trees vary across the Amazon, nutrients in rainfall may also be affected by large-scale regional forcings, but more localized and seasonal burning may have a large effect. This variability in inputs and outputs makes generalization of sustainable harvest intensity difficult. Logging is likely to cause subtle changes in soil structure and nutrient dynamics that are detectable both immediately after logging and for years to come. However, these changes do

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Michael Keller, Ruth Varner, Jadson D. Dias, Hudson Silva, Patrick Crill, Raimundo Cosme de Oliveira Jr., and Gregory P. Asner

and rain forest soils. Biogeochemistry 22 : 170 – 193 . Pereira , R. , J. C. Zweede , G. P. Asner , and M. M. Keller . 2002 . Forest canopy damage and recovery in reduced impact and conventional logging in eastern Para, Brazil. For. Ecol. Manage. 168 : 77 – 89 . Pinard , M. A. and F. E. Putz . 1996 . Retaining forest biomass by reducing logging damage. Biotropica 28 : 278 – 295 . Ramaswamy , V. Coauthors 2001 . Radiative forcing of climate change. Climate

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