Crossing thresholds in regional climate research: synthesis of the IPCC expert meeting on regional impacts, adaptation, vulnerability, and mitigation
Contributions of regional scale climate change research to the management of climate risks were explored at a meeting of researchers, policymakers, and practitioners in June 2007 (convened by the Task Group on Data and Scenario Support for Impact and Climate Analysis of the Intergovernmental Panel o...
por Portal Padrão
publicado
26/08/2009
1:05 PM
A science-policy interface in the global south: the politics of carbon sinks and science in Brazil
The IPCC and other global environmental assessment processes stress the need for national scientific participation to ensure decision makers' trust in the associated scientific conclusions and political agendas. The underpinning assumption is that the relationship between scientists and decision mak...
por Portal Padrão
publicado
26/08/2009
1:04 PM
Isotopic view of vegetation and carbon and nitrogen cycles in a cerrado ecosystem, southeastern Brazil
Carbon and nitrogen biogeochemical cycles in savannas are strongly regulated by the seasonal distribution of precipitation and pulses of nutrients released during the wetting of the dry soil and are critical to the dynamics of microorganisms and vegetation. The objective of this study was to investi...
por Portal Padrão
publicado
26/08/2009
1:03 PM
Long-term potential for tropical-forest degradation due to deforestation and fires in the Brazilian Amazon
Biome models of the global climate-vegetation relationships indicate that most of the Brazilian Amazon has potential for being covered by tropical forests. From current land-use processes observed in the region, however, substantial deforestation and fire activity have been verified in large portion...
por Portal Padrão
publicado
26/08/2009
1:03 PM
Atmosphere and hydrological controls of the evapotranspiration over a floodplain forest in the Bananal Island region, Amazonia
This article discusses seasonal and interannual variations of the evapotranspiration (ET) rates in Bananal Island floodplain, Brazil. Measurements included ET and sensible heat flux using the eddy covariance method, atmospheric forcings (net radiation, Rn, vapor pressure deficit, VPD, wind speed and...
por Portal Padrão
publicado
26/08/2009
1:02 PM
Relação do padrão sazonal da vegetação com a precipitação na região de Cerrado da Amazônia Legal, usando índices espectrais de vegetação
A precipitação é um dos principais fatores que determina a dinâmica sazonal da vegetação na região de savanas tropicais, como é o caso do cerrado brasileiro. Neste trabalho foram analisadas as relações da precipitação sazonal, com o comportamento sazonal das classes de uso e cobertura da...
por Portal Padrão
publicado
26/08/2009
1:01 PM
Precipitation and water vapor transport in the Suthern Hemisphere with emphasis on the South American region
December to March climatologies of precipitation and vertically integrated water vapor transport were analyzed and compared in order to find the main paths by which moisture is fed to high rainfall regions in the southern hemisphere in this season. The southern tropics (20°S to 0°) exhibit high ra...
por Portal Padrão
publicado
26/08/2009
1:00 PM
Games on cellular spaces: an evolutionary approach
By using differential equations, evolutionary game theory shows that most of the games of competition for resources have equilibrium strategies named Evolutionary Stable. Although this approach can deduce these points, it is not possible to say how or whether a population will reach such equilibrium...
por Portal Padrão
publicado
26/08/2009
12:59 PM
Games on cellular spaces: an evolutionary approach.
By using differential equations, evolutionary game theory shows that most of the games of competition for resources have equilibrium strategies named Evolutionary Stable. Although this approach can deduce these points, it is not possible to say how or whether a population will reach such equilibrium...
por Portal Padrão
publicado
21/08/2009
1:41 PM
Sunlight effects on diel CO2 and CH4 emissions from a tropical reservoir
Current studies show that reservoirs are responsible for emissions of greenhouse gases (St. Louis et al. 2000, Duchemin et al. 2002, Soumis et al. 2004, Abril et al. 2005, Lima et al. 2008). Surface waters of aquatic ecosystems exhibit supersaturated dissolved CO2 (Cole 1999, Richey et al. 2002) bec...
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