Climate control of terrestrial carbon exchange across biomes and continents.
Understanding the relationships between climate and carbon exchange by terrestrial ecosystems is critical to predict future levels of atmospheric carbon dioxide because of the potential accelerating effects of positive climate-carbon cycle feedbacks. However, directly observed relationships between ...
por Portal Padrão
publicado
26/08/2010
1:32 PM
Mudanças na circulação atmosférica sobre a América do Sul para cenários futuros de clima projetados pelos modelos globais do IPCC AR4.
Neste trabalho são analisadas as mudanças no padrão de circulação que possam vir a acontecer no clima da América do Sul (AS), como conseqüência do aumento nas concentrações dos gases de efeito estufa. Para isto utilizam-se cinco modelos globais do IPCC AR4 (CCCMA, GFDL, HadCM3, MIROC e GIS...
por Portal Padrão
publicado
26/08/2010
1:30 PM
Deforestation and conservation in major watersheds of the Brazilian Amazon.
Conserving natural vegetation cover is of critical importance for maintaining the ecological integrity and hydrological properties of large river basins (more than 100 000km2). Recent estimates indicate that more than 700 000km2 of Brazilian Amazon have already been deforested, and to reduce further...
por Portal Padrão
publicado
26/08/2010
1:28 PM
Design of a dry cover pilot test for acid mine drainage abatement in southern Brazil, Part II: pilot unit construction and initial monitoring.
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por Portal Padrão
publicado
26/08/2010
1:27 PM
An earth-system prediction initiative for the twenty-first century.
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por Portal Padrão
publicado
26/08/2010
1:26 PM
A comparative study of negative cloud-to-ground lightning characteristics in São Paulo (Brazil) and Arizona (United States) based on high-speed video observations.
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por Portal Padrão
publicado
26/08/2010
1:25 PM
Desmatamento, trajetórias tecnológicas rurais e metas de contenção de emissões na Amazônia.
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por Portal Padrão
publicado
26/08/2010
1:24 PM
Variability of carbon dioxide flux from tropical (Cerrado) hydroelectric reservoirs.
Hydroelectric reservoirs generate energy without significant combustion of fossil fuels. However, these systems can, potentially, emit greenhouse gases (GHGs) at a rate which may be significant at the global scale, and, possible, co-equal, per kilowatt-hour, to that from conventional coal or oil-fir...
por Portal Padrão
publicado
26/08/2010
1:21 PM
Is the forest conversion to pasture affecting the hydrological response of Amazonian catchments? signals in the Ji-Paraná basin.
It is well known that land use and land-cover changes (LUCC), particularly deforestation, have the potential to modify the hydrological response. Although those signals are relatively well documented in worldwide microcatchment studies, conflicting results reported in literature indicate that those ...
por Portal Padrão
publicado
26/08/2010
1:20 PM
The climate version of the Eta regional forecast model.
A new version of ETA WS (workstation) forecast model destined for long-term climate change simulation (ETA CCS) was designed. Numerous modifications and corrections have been made in the original code of the ETA WS forecast model. As a first step in the ETA CCS validation program, we have integrated...
por Portal Padrão
publicado
26/08/2010
1:19 PM
Climate downscaling over South America for 1961-1970 using the Eta Model.
This study shows the results from a regional climate simulation of the present-day climate, corresponding to the period 1961-1970 over South America, using the regional Eta Model nested within the HadAM3P model from the UK Hadley Centre. The simulation analysis is focused on assessing the capability...
por Portal Padrão
publicado
26/08/2010
1:18 PM
Cenários de mudança climática para a América do Sul para o final do século 21.
A melhor ferramenta para projetar cenários prováveis de alterações climáticas para o futuro são os modelos matemáticos do sistema climático global (MCG), que levam em conta de forma quantitativa (numérica) o comportamento dos compartimentos climáticos (atmosfera, oceanos, criosfera (áreas...
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