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...
por Portal Padrão
publicado
23/08/2010
4:40 PM
Caracterização espectral de plantios de Eucalyptus utilizando dados Hyperion EO-1 e SRTM.
A disponibilidade de dados hiperespectrais trouxe expectativas nos meios acadêmicos e empresariais quanto à potencialidade de sua aplicação no setor florestal. O objetivo deste trabalho foi avaliar a aplicação de dados hiperespectrais do sensor Hyperion EO-1 na caracterização espectral de pl...
por Portal Padrão
publicado
23/08/2010
4:39 PM
Design of a dry cover pilot test for acid mine drainage abatement in southern Brazil, Part II: pilot unit construction and initial monitoring.
Pyritic coal wastes produced by a coal beneficiation plant in the state of Santa Catarina in Southern Brazil are acid generating. Here we report the second part of a study evaluating the use of a dry cover to minimize acid mine drainage generation and its release into the environment. This part enco...
por Portal Padrão
publicado
23/08/2010
4:37 PM
Tropical South America east of the Andes.
Countries considered in this section include: Brazil, east Bolivia, Paraguay, and north Argentina. La Niña-like conditions were present in early 2009, followed by the development of El Niño patterns starting in June 2009. During June September, sea surface temperatures were generally about 1°C wa...
por Portal Padrão
publicado
26/06/2010
12:58 PM
Tropical South America east of the Andes.
Countries considered in this section include: Brazil, east Bolivia, Paraguay, and north Argentina. La Niña-like conditions were present in early 2009, followed by the development of El Niño patterns starting in June 2009. During June September, sea surface temperatures were generally about 1°C wa...
por Portal Padrão
publicado
23/06/2010
4:53 PM
Isótopos estáveis em rios do seminário.
Os rios intermitentes do semiárido nordestino são apropriados para o teste de hipóteses ecológicas. Este artigo apresenta um estudo com isótopos de carbono e nitrogênio que mostrou que os animais aquáticos obtêm energia de fontes do próprio sistema, e não externas....
por Portal Padrão
publicado
23/06/2010
4:43 PM
Extreme rainfall in November 2009 in southeastern.
Portions of northern Uruguay, southern Brazil and northeastern Argentina experienced significant positive precipitation anomalies during November (fig. 7.15). Northern and western Uruguay, Rio Grande do Sul (state in Brazil), and Entre Rios (province in Argentina) felt the impacts of the flooding th...
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