Uncertainty assessments of climate change projections over South America
This paper assesses the uncertainties involved in the projections of seasonal temperature and precipitation changes over South America in the twenty-first century. Climate simulations generated by 24 general circulation models are weighted according to the reliability ensemble averaging (REA) approa...
por Portal Padrão
publicado
22/06/2013
4:30 PM
An extensible real-time visualization pipeline for dynamic spatial modeling
This article presents research results of an extensible visualization pipeline for real-time exploratory analysis of spatially explicit simulations. We identify software requirements and discuss the main conceptual and design issues. We propose a protocol for data serialization, a high performance m...
por Portal Padrão
publicado
22/06/2013
3:23 PM
A Study of the long-term variability of thunderstorm days in southeast Brazil
In this report thunderstorm day monthly records obtained in three cities of southeast Brazil (SAo Paulo, Campinas, and Rio de Janeiro) since the 19th century are analyzed. The analysis is complemented by the spatial distribution of lightning in the last decade. For São Paulo and Campinas, data indi...
por Portal Padrão
publicado
22/06/2013
2:37 PM
The relationship between thunderstorm and solar activity for Brazil from 1951 to 2009
The goal of this article is to investigate the influence of solar activity on thunderstorm activity in Brazil. For this purpose, thunder day data from seven cities in Brazil from 1951 to 2009 are analyzed with the wavelet method for the first time. To identify the 11-year solar cycle in thunder day ...
por Portal Padrão
publicado
22/06/2013
2:36 PM
UPLIGHTS upward lightning triggering study
The Upward Lightning Triggering Study (UPLIGHTS) is a three-year National Science Foundation-funded field project that is taking place in Rapid City, South Dakota, from April 2012 to September 2014. Three upward flashes that occurred within a 20-min period were all triggered by a preceding +CG (clou...
por Portal Padrão
publicado
22/05/2013
4:34 PM
A sustentabilidade como ferramenta estratégica empresarial: governança corporativa e aplicação do triple bottom line na Masisa
A ideia de sustentabilidade na empresa indica que, para alcançar um bom desempenho econômico, as empresas devem adotar uma estratégia que contemple o conceito triple bottom line, segundo o qual, as empresas devem prestar contas de sua performance nas áreas econômica, ambiental e social. O prese...
por Portal Padrão
publicado
22/05/2013
1:25 PM
Simulated resilience of tropical rainforests to CO2 -induced climate change: supplementary information
How tropical forest carbon stocks might alter in response to changes in climate and atmospheric composition is uncertain. However, assessing potential future carbon loss from tropical forests is important for evaluating the efficacy of programmes for reducing emissions from deforestation and degrada...
por Portal Padrão
publicado
22/04/2013
2:02 PM
Simulated resilience of tropical rainforests to CO2 -induced climate change
How tropical forest carbon stocks might alter in response to changes in climate and atmospheric composition is uncertain. However, assessing potential future carbon loss from tropical forests is important for evaluating the efficacy of programmes for reducing emissions from deforestation and degrada...
por Portal Padrão
publicado
22/04/2013
1:59 PM
Latin America’s nitrogen challenge
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por Portal Padrão
publicado
22/04/2013
1:18 PM
The droughts of 1997 and 2005 in Amazonia: floodplain hydrology and its potential ecological and human impacts
It is well known that most of the severe droughts in Amazonia, such as that of 1997, are El Nio-related. However, in 2005, the Amazon was affected by a severe drought that was not El Nio-related, as most of the rainfall anomalies that have happened in southwestern Amazonia are driven by sea surface ...
por Portal Padrão
publicado
22/02/2013
4:29 PM
Electric fields changes produced by positives cloud-to-ground lightning flashes
Positive flashes correspond to approximately only 10\% of the total number of flashes produced by a thunderstorm. However, strokes with high peak currents and long continuing currents are usually present in positive flashes. Therefore, positive flashes are responsible for more intense damage than th...
por Portal Padrão
publicado
22/01/2013
4:22 PM
The impacts of global climate changes on the wind power density in Brazil
Brazils wind energy production has escalated up recently. However, the long-term wind projects do not include the yet unknown impacts of climate changes on wind power. This work is an assessment of these impacts by applying forecasts of a climate model and trend analysis over climatological time ser...
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