An intercomparison of observed and simulated extreme rainfall and temperature events during the last half of the twentieth century: part 2: historical trends.
Projections of changes in climate extremes are critical to assessing the potential impacts of climate change on human and natural systems. Therefore, especial care should be put on the validation of those extremes derived for present climate in both spatial and temporal variability. We analyze histo...
por Portal Padrão
publicado
26/08/2010
1:05 PM
Regional climate change scenarios in South America in the late XXI century: projections and expected impacts.
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por Portal Padrão
publicado
26/08/2010
1:04 PM
Future change of climate in South America in the late twenty-first century: intercomparison of scenarios from three regional climate models.
Regional climate change projections for the last half of the twenty-first century have been produced for South America, as part of the CREAS (Cenarios REgionalizados de Clima Futuro da America do Sul) regional project. Three regional climate models RCMs (Eta CCS, RegCM3 and HadRM3P) were nested with...
por Portal Padrão
publicado
26/08/2010
1:01 PM
Extreme rainfall and the flood of the century in Amazonia 2009.
During the austral summer and winter 2009, the Amazon basin, drained by the Amazon River and its tributaries, was hit by heavy flooding. This year the water level rose higher and stayed longer than it has in several decades. According to national and international press, almost 376 000 people were l...
por Portal Padrão
publicado
23/08/2010
4:52 PM
The use of Euclidean geometric distance on RGB color space for classification of sky and cloud patterns.
The current work describes the use of multidimensional Euclidean geometric distance (EGD) and Bayesian methods to characterize and classify the sky and cloud patterns present in image pixels. From specific images and using visualization tools, it was noticed that sky and cloud patterns occupy a typi...
por Portal Padrão
publicado
23/08/2010
4:50 PM
Impacts, adaptation and vulnerability to global environmental change: challenges and pathways for an action-oriented research agenda for middle-income and low-income countries.
The socio-economic impacts of environmental stresses associated with global environmental change depend to a large extent on how societies organize themselves. Research on climate-related societal impacts, vulnerability and adaptation is currently underdeveloped, prompting international global envir...
por Portal Padrão
publicado
23/08/2010
4:49 PM
The social status of climate change knowledge.
Contemporary societies are being transformed by growing preoccupation with global environmental risks. The scientific basis for worries about human-induced climate change has consolidated, but many dimensions and implications remain uncertain and imprecise. In this area of what has been called post-...
por Portal Padrão
publicado
23/08/2010
4:48 PM
The climatic sensitivity of the forest, savanna and forest-savanna transition in tropical South America.
We used a climate-vegetation-natural fire (CVNF) conceptual model to evaluate the sensitivity and vulnerability of forest, savanna, and the forest-savanna transition to environmental changes in tropical South America. Initially, under current environmental conditions, CVNF model results suggested th...
por Portal Padrão
publicado
23/08/2010
4:47 PM
Irrigation with domestic wastewater: amultivariate analysis of main soil changes.
Irrigation with treated domestic sewage wastewater (TSE) is an agricultural practice to reduce water requirements of agroecossystems and the nutrient load impact on freshwaters, but adverse effects on soil chemical (salinization, sodification, etc.) and soil physical properties (alteration in soil p...
por Portal Padrão
publicado
23/08/2010
4:45 PM
Foreword.
The Intergovernmental Panel on Climate Change (IPCC) projections for this century would certainly result in a suite of biophysical and socio-economic impacts on the Brazilian coastal zone that would ultimately affect several sectors, including natural ecosystems, fisheries, transportation, tourism a...
por Portal Padrão
publicado
23/08/2010
4:44 PM
Análise da dinâmica sazonal de duas formações florestais do bioma Mata Atlântica com base em índices de vegetação.
Composições de 16 dias de índices de vegetação do sensor Moderate Resolution Imaging Spectroradiometer (MODIS), com resolução espacial de 250 metros, a bordo do satélite TERRA, foram utilizadas para caracterizar a dinâmica sazonal, no período de 2008, de duas fitofisionomias do bioma Mata ...
por Portal Padrão
publicado
23/08/2010
4:42 PM
Modelagem numérica da irradiação solar como método alternativo na avaliação do potencial energético disponível.
A modelagem numérica é uma importante ferramenta para a estimativa e previsão dos recursos de energia solar, imprescindíveis para o desenvolvimento, implementação e operação de projetos para aproveitamento dessa fonte energética limpa e de caráter renovável. O artigo apresenta o estudo re...
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