Brazilian amazon indigenous peoples threatened by mining bill.
The Brazilian Amazon has the highest concentration of indigenous peoples in the world. Recently, the Brazilian government sent a bill to Congress to regulate commercial mining in indigenous lands. This work analyzes the risks of the proposed mining bill to Amazonian indigenous peoples and their land...
por Portal Padrão
publicado
06/10/2020
7:22 PM
Hydro-geomorphological characterization of the Rio Grande Basin, Brazil, using geospatial approach.
Several studies have presented morphometric analysis as the key to understanding hydrological behavior or support tool for the assessment of natural resources and environmental risks in a river basin. The Rio Grande Basin has great socioeconomic and environmental relevance for Brazil; however, its m...
por Portal Padrão
publicado
06/10/2020
5:40 PM
Enhancement of Cloudless Skies Frequency over a Large Tropical Reservoir in Brazil.
Several studies show the effects of lake breezes on cloudiness over natural lakes and large rivers, but only few contain information regarding large flooded areas of hydroelectric dams. Most Brazilian hydropower plants have large water reservoirs that may induce significant changes in the local envi...
por Portal Padrão
publicado
27/09/2020
3:02 PM
Woody aboveground biomass mapping of the brazilian savanna with a multi-sensor and machine learning approach.
The tropical savanna in Brazil known as the Cerrado covers circa 23% of the Brazilian territory, but only 3% of this area is protected. High rates of deforestation and degradation in the woodland and forest areas have made the Cerrado the second-largest source of carbon emissions in Brazil. However,...
por Portal Padrão
publicado
18/09/2020
9:48 AM
Nitrous oxide fluxes over establishing biofuel crops: characterization of temporal variability using the cross-wavelet analysis.
Emissions of nitrous oxide (N2O) over croplands are a major source of greenhouse gases to the atmosphere. The precise accounting of sources of N2O is essential to national and global budgets, as well as the understanding of the spatial and temporal relationships with environmental variables such as ...
por Portal Padrão
publicado
14/09/2020
11:36 AM
Refining national greenhouse gas inventories.
The importance of greenhouse gas inventories cannot be overstated: the process of producing inventories informs strategies that governments will use to meet emissions reduction targets. The Intergovernmental Panel on Climate Change (IPCC) leads an effort to develop and refine internationally agreed ...
por Portal Padrão
publicado
14/09/2020
11:35 AM
Biological nitrogen fixation across major biomes in Latin America: patterns and global change effects.
Biological nitrogen fixation (BNF) supports terrestrial primary productivity and plays key roles in mediating human-induced changes in global nitrogen (N) and carbon cycling. However, there are still critical uncertainties in our understanding of the amount of BNF occurring across terrestrial ecosys...
por Portal Padrão
publicado
14/09/2020
11:32 AM
Spatiotemporal data analysis with chronological networks.
The number of spatiotemporal data sets has increased rapidly in the last years, which demands robust and fast methods to extract information from this kind of data. Here, we propose a network-based model, called Chronnet, for spatiotemporal data analysis. The network construction process consists of...
por Portal Padrão
publicado
14/09/2020
11:31 AM
Downscaling of climate extremes over South America – Part I: model evaluation in the reference climate.
In this paper, we evaluate temperature and precipitation trends over South America (SA), simulated by the regional Eta model with 20-km horizontal resolution nested to three global models: The Canadian Earth System Model Second Generation (CanESM2-ES), The Met Office Hadley Centre Global Environment...
por Portal Padrão
publicado
14/09/2020
11:29 AM
Corrigendum to “Analysis of areas undergoing desertification, using EVI2 multi-temporal data based on MODIS imagery as indicator”
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por Portal Padrão
publicado
14/09/2020
11:26 AM
Detection of extreme phenomena in the stable boundary layer over the Amazonian forest.
We apply different methods for detection of extreme phenomena (EP) in air-turbulent time series measured in the nocturnal boundary layer above the Amazon forest. The methods used were: (a) a Morlet complex wavelet transform, which is often used in analysis of non-linear application processes. Throug...
por Portal Padrão
publicado
06/09/2020
7:14 PM
Assessing drought in the drylands of northeast Brazil under regional warming exceeding 4 degrees C
Historically, during periods of extreme drought, food security in the drylands of the semiarid region of Northeast Brazil (NEB) is under severe risk due to agricultural collapse. The drought that started in 2012 continues to highlight the vulnerability of this region, and arid conditions have been d...
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