Spatio-temporal change detection from multidimensional arrays: detecting deforestation from MODIS time series.
Growing availability of long-term satellite imagery enables change modeling with advanced spatio-temporal statistical methods. Multidimensional arrays naturally match the structure of spatio-temporal satellite data and can provide a clean modeling process for complex spatio-temporal analysis over la...
por Portal Padrão
publicado
20/07/2016
3:26 PM
A conceptual framework for analyzing deltas as coupled social–ecological systems: an example from the Amazon River Delta
At the nexus of watersheds, land, coastal areas, oceans, and human settlements, river delta regions pose specific challenges to environmental governance and sustainability. Using the Amazon Estuary-Delta region (AD) as our focus, we reflect on the challenges created by the high degree of functional ...
por Portal Padrão
publicado
20/07/2016
2:16 PM
Floristic and structure of an Amazonian primary forest and a chronosequence of secondary succession
The analysis of changes in species composition and vegetation structure in chronosequences improves knowledge on the regeneration patterns following land abandonment in the Amazon. Here, the objective was to perform floristic-structural analysis in mature forests (with/without timber exploitation) a...
por Portal Padrão
publicado
21/06/2016
1:26 PM
Sensitivity of the Amazon biome to high resolution climate change projections
Despite the reduction in deforestation rate in recent years, the impact of global warming by itself can cause changes in vegetation cover. The objective of this work was to investigate the possible changes on the major Brazilian biome, the Amazon Rainforest, under different climate change scenarios....
por Portal Padrão
publicado
20/06/2016
3:27 PM
CO2 and CO emission rates from three forest fire controlled experiments in Western Amazonia
In this work, we analyze the expansion of forestry activities with Eucalyptus in the Paraiba do Sul basin, region located in Sao Paulo, Brazil, from 1986 to 2010. In this region is situated the most important and largest extension of reminiscent of Mata Atlântica Biome reminiscent. This biome has b...
por Portal Padrão
publicado
20/06/2016
2:27 PM
Spondias tuberosa trees grown in tropical, wet environments are more susceptible to drought than those grown in arid environments
In this study, we investigated the different responses of Spondias tuberosa (umbu) trees, which grow in two different ecological life zones in northeast Brazil: tropical wet and tropical arid ecosystems. We evaluated the responses of plants grown under humid and dry conditions by measuring the photo...
por Portal Padrão
publicado
20/06/2016
2:21 PM
Atmospheric aerosol influence on the Brazilian solar energy assessment: Experiments with different horizontal visibility bases in radiative transfer model
The radiative transfer model BRASIL-SR is used by Brazilian Institute for Space Research for the assessment of the solar irradiation in Brazil. The model parameterizes the influence of aerosols in the solar radiation transmittance using climate averages of horizontal visibility, which does not repre...
por Portal Padrão
publicado
20/05/2016
2:31 PM
The effects of Sao Paulo urban heat island on lightning activity: decadal analysis (1999-2009)
Eleven years of lightning data from the Brazilian Integrated National Lightning Detection Network were used to analyze the effects of the urban heat island (UHI) of Sao Paulo on lightning activity, extending the investigation of previous works. Cloud-To-ground lightning data were analyzed in both sp...
por Portal Padrão
publicado
20/05/2016
2:10 PM
Land use change emission scenarios: anticipating a forest transition process in the Brazilian Amazon
Following an intense occupation process that was initiated in the 1960s, deforestation rates in the Brazilian Amazon have decreased significantly since 2004, stabilizing around 6000 km2 yr-1 in the last 5 years. A convergence of conditions contributed to this, including the creation of protected are...
por Portal Padrão
publicado
20/05/2016
1:47 PM
Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian semiarid region, for use in Dynamic Global Vegetation Models.
The semiarid region of northeastern Brazil, the Caatinga, is extremely important due to its biodiversity and endemism. Measurements of plant physiology are crucial to the calibration of Dynamic Global Vegetation Models (DGVMs) that are currently used to simulate the responses of vegetation in face o...
por Portal Padrão
publicado
20/04/2016
4:07 PM
On the impact of haze on the yield of photovoltaic systems in Singapore
Anthropogenic haze, caused at least in parts by forest and agricultural land clearing fires in Sumatra (Indonesia), is occasionally causing air quality issues in Singapore, located 150-300 km east of the majority of these "hot spots". The resulting air pollution partially blocks sunlight from reachi...
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