The South American rainfall dipole: a complex network analysis of extreme events.
Intraseasonal rainfall variability of the South American monsoon system is characterized by a pronounced dipole between southeastern South America and southeastern Brazil. Here we analyze the dynamical properties of extreme rainfall events associated with this dipole by combining a nonlinear synchro...
por Portal Padrão
publicado
20/08/2014
2:23 PM
Ecosystem protection and poverty alleviation in the tropics: perspective from a historical evolution of policy-making in the Brazilian Amazon.
Despite increased intellectual and conceptual consideration of the linkages between ecosystem service (ES) provisions and poverty alleviation (PA) globally, there has been limited analysis of how these paradigms are used and framed in the regional context of policy-making. In this paper, we address ...
por Portal Padrão
publicado
20/06/2014
4:05 PM
Amazon forest biomass density maps: tackling the uncertainty in carbon emission estimates.
As land use change (LUC), including deforestation, is a patchy process, estimating the impact of LUC on carbon emissions requires spatially accurate underlying data on biomass distribution and change. The methods currently adopted to estimate the spatial variation of above- and below-ground biomass ...
por Portal Padrão
publicado
20/06/2014
3:55 PM
Correlation analysis between the occurrence of ionospheric scintillation at the magnetic equator and at the southern peak of the Equatorial ionization anomaly.
Ionospheric scintillation refers to amplitude and phase fluctuations in radio signals due to electron density irregularities associated to structures named ionospheric plasma bubbles. The phenomenon is more pronounced around the magnetic equator where, after sunset, plasma bubbles of varying sizes a...
por Portal Padrão
publicado
20/06/2014
3:37 PM
Mechanisms of water supply and vegetation demand govern the seasonality and magnitude of evapotranspiration in Amazonia and Cerrado.
Evapotranspiration (E) in the Amazon connects forest function and regional climate via its role in pre-cipitation recycling However, the mechanisms regulating water supply to vegetation and its demand forwater remain poorly understood, especially during periods of seasonal water deficits In this stu...
por Portal Padrão
publicado
20/06/2014
2:53 PM
On β2 stepped leaders in negative cloud-to-ground lightning.
In their seminal lightning studies using streak cameras, Schonland et al. (1938) identified four negative stepped leader events that they term β2, a rather rare variant of the type β leader, and in it, the second and slower stage of the leader is associated with the appearance of one or more fast ...
por Portal Padrão
publicado
20/06/2014
2:41 PM
Índice de adaptabilidade à economia verde: avaliação da cana-de-açúcar na microrregião de Ribeirão Preto/SP.
A Economia Verde (EV) é um assunto emergente no contexto das discussões científicas e políticas mundiais, tendo como principal desafio tornar as atividades econômicas em atividades sustentáveis. A cadeia produtiva da cana-de-açúcar envolve questões sociais, econômicas e ambientais controve...
por Portal Padrão
publicado
20/04/2014
2:01 PM
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...
Redes Sociais