Caatinga, the Brazilian dry tropical forest: can it tolerate climate changes?.
Our review focuses on the projections of climate change in the Brazilian semiarid region, the Caatinga, based on recent publications about global climate change and biology. We found several vulnerable points in the initial estimates, the main one being that the data were collected and analyzed with...
por Portal Padrão
publicado
20/03/2014
4:23 PM
Analysis of plans, programs and policies to combat desertification in the state of Ceara – Brazil in the period 2004 to 2012
According to the State Program of Action to Combat Desertification and Mitigate the Effects of Drought (PAE/CE), the State of Ceara-Brazil has three centers configured with Areas Susceptible to Desertification which are the Hinterlands of Inhamuns, the Hinterlands Irauçuba and Center North and the ...
por Portal Padrão
publicado
20/03/2014
4:12 PM
Understanding the relationships between ecosystem services and poverty alleviation: a conceptual framework.
As interest grows in the contribution of ecosystem services to poverty alleviation, we present a new conceptual framework, synthesizing insights from existing frameworks in social-ecological systems science and international development. People have differentiated abilities to benefit from ecosystem...
por Portal Padrão
publicado
20/03/2014
3:21 PM
Variability of carbon and water fluxes following climate extremes over a tropical forest in southwestern Amazonia.
The carbon and water cycles for a southwestern Amazonian forest site were investigated using the longest time series of fluxes of CO2 and water vapor ever reported for this site. The period from 2004 to 2010 included two severe droughts (2005 and 2010) and a flooding year (2009). The effects of such...
por Portal Padrão
publicado
21/02/2014
1:12 PM
Lightning forecasting in southeastern Brazil using the WRF model.
This paper introduces a lightning forecasting method called Potential Lightning Region (PLR), which is the probability of the occurrence of lightning over a region of interest. The PLR was calculated using a combination of meteorological variables obtained from high-resolution Weather Research and F...
por Portal Padrão
publicado
21/01/2014
1:10 PM
High-speed video observations of natural cloud-to-ground lightning leaders: a statistical analysis.
The aim of this investigation is to analyze the phenomenology of positive and negative (stepped and dart) leaders observed in natural lightning from digital high-speed video recordings. For that intent we have used four different high-speed cameras operating at frame rates ranging from 1000 or 11,80...
por Portal Padrão
publicado
20/01/2014
4:39 PM
Pervasive transition of the Brazilian land-use system
Agriculture, deforestation, greenhouse gas emissions and local/regional climate change have been closely intertwined in Brazil. Recent studies show that this relationship has been changing since the mid 2000s, with the burgeoning intensification and commoditization of Brazilian agriculture. On one h...
por Portal Padrão
publicado
20/01/2014
3:35 PM
Simulation of rainfall anomalies leading to the 2005 drought in Amazonia using the CLARIS LPB regional climate models
The meteorological characteristics of the drought of 2005 in Amazonia, one of the most severe in the last 100 years were assessed using a suite of seven regional models obtained from the CLARIS LPB project. The models were forced with the ERA-Interim reanalyses as boundary conditions. We used a comb...
por Portal Padrão
publicado
22/12/2013
2:18 PM
Two contrasting severe seasonal extremes in Tropical South America in 2012: flood in Amazonia and drought in Northeast Brazil
Two simultaneous extreme events affected tropical South America to the east of the Andes during the austral summer and fall of 2012: a severe drought in Northeast Brazil and intense rainfall and floods in Amazonia, both considered records for the last 50 years. Changes in atmospheric circulation and...
por Portal Padrão
publicado
22/11/2013
2:15 PM
Oil palm biodiesel: Brazil’s main challenges
The National Program for Production and Use of Biodiesel (PNPB), launched in Brazil, is based on the diversification of its feedstock and social inclusion. Among the various oilseeds, palm was identified as the ideal one for the Northern region. However, the participation of palm is still not repres...
por Portal Padrão
publicado
22/10/2013
1:39 PM
Climate simulation and change in the Brazilian Climate Model
The response of the global climate system to atmospheric CO2 concentration increase in time is scrutinized employing the Brazilian Climate Model (BESM-OA2.3). Through the achievement of over two thousand years of coupled model integrations in ensemble mode, it is shown that the model simulates the s...
por Portal Padrão
publicado
22/09/2013
2:30 PM
Mapa de uso e cobertura da terra do território brasileiro para uso em modelagem climática e meteorológica
Diversos estudos com Modelos de Circulação Geral da Atmosfera (MCGAs) e Modelos Regionais (MR) considerando diferentes ecossistemas (CHARNEY et al., 1977; XUE ; SHUKLA 1993; CLARK et al., 2001; TAYLOR, 2002; OYAMA, 2002; XUE et al., 2004; SOUZA, 2006; OLIVEIRA, 2008; CUNHA, 2013) mostraram que a a...
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