Extreme flood events in the Bolivian Amazon wetlands
Study region: The Amazonian wetlands of Bolivia, known as the Llanos de Moxos, are believed to play a crucial role in regulating the upper Madeira hydrological cycle, the most important southern tributary of the Amazon River. Because the area is vast and sparsely populated, the hydrological function...
por Portal Padrão
publicado
20/03/2016
4:02 PM
Segurança alimentar e mudanças ambientais globais: uma análise no contexto da sociedade brasileira.
A agricultura participa tanto das causas como das consequências das mudanças ambientais globais que, por sua vez, podem acentuar a vulnerabilidade da segurança alimentar da sociedade. Por meio de uma visão holística do sistema alimentar, este trabalho traz uma revisão narrativa da literatura, ...
por Portal Padrão
publicado
20/03/2016
4:01 PM
Impacts of future deforestation and climate change on the hydrology of the Amazon Basin: a multi-model analysis with a new set of land-cover change scenarios.
Deforestation in Amazon is expected to decrease evapotranspiration (ET) and to increase soil moisture and river discharge under prevailing energy-limited conditions. The magnitude and sign of the response of ET to deforestation depend both on the magnitude and regional patterns of land-cover change ...
por Portal Padrão
publicado
08/03/2016
9:23 AM
Some characteristics and impacts of the drought and water crisis in southeastern Brazil during 2014 and 2015
Since the austral summer of 2014 southeastern Brazil has been experiencing one of the most severe droughts in decades. This rainfall deficiency has generated water shortages and a water crisis that have affected population and local economies in the metropolitan region of Sao Paulo, the largest mega...
por Portal Padrão
publicado
20/02/2016
3:56 PM
Deforestation scenarios for the Bolivian lowlands
Tropical forests in South America play a key role in the provision of ecosystem services such as carbon sinks, biodiversity conservation, and global climate regulation. In previous decades, Bolivian forests have mainly been deforested by the expansion of agricultural frontier development, driven by ...
por Portal Padrão
publicado
21/01/2016
1:29 PM
Toward accounting for ecoclimate teleconnections: intra- and inter-continental consequences of altered energy balance after vegetation change
Context Vegetation is projected to continue to undergo major structural changes in coming decades due to land conversion and climate change, including widespread forest die-offs. These vegetation changes are important not only for their local or regional climatic effects, but also because they can a...
por Portal Padrão
publicado
21/01/2016
1:27 PM
Uso da geotecnologia para análise temporal da cobertura florestal
The landscape ecology metrics associated with data mining can be used to increase the potential of remote sensing data analysis and applications, being an important tool for decision making. The present study aimed to use data mining techniques and landscape ecology metrics to classify and quantify ...
por Portal Padrão
publicado
20/01/2016
4:16 PM
HAND contour: a new proxy predictor of inundation extent
Tools for accurately predicting environmental risks, such as the location and spatial extent of potential inundation, are not widely available. A dependence on calibration and a lack of available flood data have prevented the widespread application of existing hydrodynamic methods for predicting the...
por Portal Padrão
publicado
20/01/2016
3:54 PM
Desempenho do modelo HAND no mapeamento de áreas suscetíveis à inundação usando dados de alta resolução espacial
O mapeamento das áreas suscetíveis à inundação constitui uma etapa importante na minimização dos danos gerados por enchentes, sobretudo em áreas urbanas. Este mapeamento é usado no estabelecimento de diretrizes de uso e ocupação do solo e na formulação dos planos de defesa civil. No mun...
por Portal Padrão
publicado
20/01/2016
3:53 PM
Downward transport of ozone rich air and implications for atmospheric chemistry in the Amazon rainforest.
From April 2014 to January 2015, ozone (O3) dynamics were investigated as part of GoAmazon 2014/5 project in the central Amazon rainforest of Brazil. Just above the forest canopy, maximum hourly O3 mixing ratios averaged 20 ppbv (parts per billion on a volume basis) during the JuneSeptember dry mont...
por Portal Padrão
publicado
20/01/2016
2:58 PM
Toward an integrated monitoring framework to assess the effects of tropical forest degradation and recovery on carbon stocks and biodiversity
Tropical forests harbor a significant portion of global biodiversity and are a critical component of the climate system. Reducing deforestation and forest degradation contributes to global climate-change mitigation efforts, yet emissions and removals from forest dynamics are still poorly quantified....
por Portal Padrão
publicado
20/01/2016
2:17 PM
Climate change impacts on the sustainability of the firewood harvest and vegetation and soil carbon stocks in a tropical dry forest in Santa Teresinha Municipality, Northeast Brazil
The Brazilian semi-arid region is characterized by low and erratic rainfall, high temperatures and high potential evapotranspiration. The removal of firewood from the native tropical dry forest, called Caatinga, can negatively impact important ecosystem services, such as soil conservation, water res...
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