Artigos
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02/05/2019 4:07 PM |
Comparison of methodologies for cloud cover estimation in Brazil - A case study Clouds are the major modulator of the shortwave and longwave radiation components of the Earth's energy balance and, as such, help to regulate the planet's temperature. In the energy sector, clouds are a source of instability in the generation of energy using solar technologies. This study aims at c... |
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02/05/2019 4:04 PM |
The large excess of solid waste generated in cities is a result of population growth and economic development. Properly managing this municipal solid waste (MSW) is a challenge, mainly in underdeveloped and developing countries where financial concerns are an added problem. From the environmental... |
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02/05/2019 4:02 PM |
Natural disasters and finding suitable areas to dispose of municipal solid waste (MSW) are two major global challenges, both of which have several influences in the water resources and are related to climatic change, especially in developing countries like Brazil. Currently the risk of natural di... |
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02/05/2019 4:00 PM |
Using Geotechnology to Estimate Annual Soil Loss Rate in the Brazilian Cerrado Soil erosion is a serious environmental problem that has adversely affected the world’s food production through the reduction of land productivity and water availability. The present study estimated annual soil loss rate and its spatial distribution in the most important Brazil’s agricultural... |
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02/05/2019 3:57 PM |
Understanding how Amazonian rainforests deal with extended droughts is critical in the face of changing climate. This research analyze the physical properties and the soil water dynamics of a deep soil profile in an area of primary forest in central Amazonia to elucidate these processes under dro... |
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02/05/2019 3:54 PM |
Landslides events on slopes occur recurrently in Campos do Jordão - SP, causing human losses and material damage. This article aims to identify spatially the unstable slopes areas in Piracuama stream basin, where Villa Albertina is located, an area frequently aff ected by these events. Therefore, i... |
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02/05/2019 3:51 PM |
The State of São Paulo in Southeast Brazil experienced during the 2012/2013 summer one of the most severe electrical storm events in recent years, causing various impacts to society, e.g. fires and fatalities. Thus, the objective of this work is to understand which mechanisms and climatic variabili... |
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02/05/2019 3:48 PM |
Pantanal is one of the largest wetlands in the world. In its southern portion, it hosts significant beef cattle ranching, having a herd of 4,832,200 head of cattle in 2016 (IBGE, 2018). Yet it presents intra-regional differences and complementarities. This article discusses such current territory ... |
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02/05/2019 3:44 PM |
Species distribution models (SDMs) are tools to obtain habitat suitability maps based on historical species occurrences and environmental variables. Those maps can be used to restrict fishing grounds or to assist in planning and reserve selection. This is especially important for species at ris... |
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02/05/2019 3:42 PM |
Climate change impact on the potential yield of Arabica coffee in southeast Brazil The Intergovernmental Panel on Climate Change (IPCC) projections of global mean temperature rises are worrisome for coffee crop due to the intolerance of the Arabica species to high air temperature variations. The crop has a large participation in the Brazilian trade balance; therefore, in this ... |
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02/05/2019 3:39 PM |
Improving drought management in the Brazilian semiarid through crop forecasting In this paper, we evaluated the performance of the model AquaCrop for crop yield forecasting in the Brazilian semiarid (BSA) using meteorological observation and Eta model seasonal climate forecasts as input data. The study area is characterized by low rainfall that is poorly distributed throughout ... |
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02/05/2019 3:35 PM |
We introduce a new tool the Spectral Taylor Diagram (STD) for the comparison of time series in the frequency domain. The STD provides a novel way of displaying the squaredcoherence, power, amplitude, phase, and rootmeansquared difference of discrete frequencies of two timeseries. Each STD summarise... |
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02/05/2019 3:29 PM |
O mercado brasileiro da energia eólica, impactos sociais e ambientais The share of wind power is rapidly increasing in the Brazilian energy market due to its large potential in some Brazilian regions and its renewability as a resource, presenting low GHG emissions compared to other energy resources. Wind energy is therefore a promising alternative given the current en... |
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02/05/2019 3:27 PM |
Biomass burning emission disturbances of isoprene oxidation in a tropical forest We present a characterization of the chemical composition of the atmosphere of the Brazilian Amazon rainforest based on trace gas measurements carried out during the South AMerican Biomass Burning Analysis (SAMBBA) airborne experiment in September 2012.We analyzed the observations of primary bi... |
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02/05/2019 3:23 PM |
Cities are mainly a product of collective consumption and there is a pressing need to expand and deepen the discussion about the quality of access to collective goods and services in the urban world: the availability of electricity and potable water and its interrelation with the lack of solid waste... |
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02/05/2019 3:17 PM |
We coupled the hydrologic routing and flood dynamics model Terrestrial Hydrology Model with Biogeochemistry (THMB) to the Integrated LAND Surface Model (INLAND) and compared simulations of the discharge and flood extent area against gauge station and satellite-based information in the Amazon Basi... |
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02/05/2019 3:10 PM |
tStudy region: The Amazonian wetlands of Bolivia, known as the Llanos de Moxos, arebelieved to play a crucial role in regulating the upper Madeira hydrological cycle, the mostimportant southern tributary of the Amazon River. Because the area is vast and sparselypopulated, the hydrological functionin... |
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02/05/2019 2:22 PM |
A Time-Weighted Dynamic Time Warping Methodfor Land-Use and Land-Cover Mapping This paper presents a time-weighted version of the dynamic time warping (DTW)method for land-use and land-cover classification using remote sensing image time series. Methods based on DTW have achieved significant results in time-series data mining. The original DTW method works well for shape m... |
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02/05/2019 2:11 PM |
HAND TERRAIN DESCRIPTOR FOR MAPPING REGIONAL SCALE ECO-HYDROLOGICAL UNITS OF AMAZON TERRA FIRME The HAND (Height Above the Nearest Drainage), a quantitative topographic descriptor, is used to classify terrain in a manner that is related to local soil water conditions, providing hydrological meaning to the SRTM DEM. The HAND was calibrated in a small basin (37km²) of similar topographical char... |
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02/05/2019 1:33 PM |
This study presents a methodology for susceptibility mapping of shallow landslides just from data and software from the public domain. The study was conducted in a mountainous region located on the southeastern Brazilian coast, in the state of São Paulo. The proposal is that the methodology ca... |
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02/05/2019 1:29 PM |
We assessed the rainwater chemistry, the potential sources of its main inorganic components and bulk atmospheric deposition in a rural tropical semiarid region in the Brazilian Caatinga. Rainfall samples were collected during two wet seasons, one during an extremely dry year (2012) and one during a ... |
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02/05/2019 1:19 PM |
Este artigo avalia como os atores do setor produtivo da pecuária bovina brasileira compreendem o papel desta atividade econômica na segurança alimentar em um contexto de reprimarização da economia. Com base em 12 entrevistas semiestruturadas com representantes da cadeia produtiva brasileira, re... |
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02/05/2019 11:48 AM |
The soil is a key component of the Earth System, and is currently under high pressure, due to the increasing global demands for food, energy and fiber. Moreover, the management of agricultural systems is often inadequate and ignores the agricultural suitability of lands, and particularly the vuln... |
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02/05/2019 11:45 AM |
Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil Soil is a natural resource that has been affected by human pressures beyond its renewal capacity. For this reason, large agricultural areas that were productive have been abandoned due to soil degradation, mainly caused by the erosion process. The objective of this study was to apply the Universa... |
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02/05/2019 11:38 AM |
Arctic Sea Ice: Decadal Simulations and Future Scenarios Using BESM-OA on the abrupt decline of Arctic sea ice and its impact on the Global Climate System. In this paper, we evaluated the ability of the newly implemented Brazilian Earth System Model (BESM-OA) to represent Arctic sea ice and sensitivity to CO2 forcing, using decadal simulations (1980-2012) and future sc... |
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02/05/2019 11:25 AM |
Identifying areas susceptible to desertification in the Brazilian northeast Approximately 57% of the Brazilian northeast region is recognized as semi-arid land and has been undergoing intense land use processes in the last decades, which have resulted in severe degradation of its natural assets. Therefore, the objective of this study is to identify the areas that are s... |
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02/05/2019 11:21 AM |
The main source of electricity in Brazil is from hydro, which has about 65.2% share of the country’selectric energy matrix. However, over the last decade the wind energy increased from 19 MW to 2.2 GW.Since wind is an intermittent energy source, heavily determined by the weather and climatic condi... |
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02/05/2019 11:16 AM |
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... |
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02/05/2019 11:10 AM |
This study aims to describe the role of mobility in malaria transmission by discussing recent changes in population movements in the Brazilian Amazon and developing a flow map of disease transmission in this region.... |
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02/05/2019 8:11 AM |
Studies on numerical modeling in Amazonia show that the models fail to capture im-portant aspects of climate variability in this region and it is important to understandthe reasons that cause this drawback. Here, we study how the general circulationmodels of the Coupled Model Intercomparison Project... |
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02/05/2019 8:05 AM |
This study evaluates the simulations of the Noah-MP surface processes over a crop and a forest sites in Amazonia using tower observations. Soil moisture simulations agree with the observations in both land covers, mainly during the rainy season. However, simulations show cold biases in the soil... |
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02/05/2019 7:54 AM |
Atmospheric Electric Field Sensors Network Integration in Brazil This paper presents the integration details of an operational Atmospheric Electric Field Mill Sensor (EFM) Network for standardized and continuous operation in the region of São José dos Campos, State of São Paulo, Brazil, in order to collect and transmit real time data for studies of atmosph... |
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02/05/2019 7:49 AM |
Abundant research has been devoted to under-standing the complexity of the biogeochemical and physi-cal processes that are responsible for greenhouse gas (GHG)emissions from hydropower reservoirs. These systems mayhave spatially complex and heterogeneous GHG emissionsdue to flooded b... |
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30/04/2019 4:46 PM |
Land cover change in the Neotropics represents one of the major drivers of global environmental change. Several models have been proposed to explore future trajectories of land use and cover change, particularly in the Amazon. Despite the remarkable development of these tools, model results are stil... |
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30/04/2019 4:33 PM |
Sea-level rise is one of the main effects of climate changes on coastal zones; mangroves are particularly sensitive to this process. In addition, intense human occupation hinders angrove colonization of new areas. This paper proposes a methodological approach, using spatially explicit modeling ba... |
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30/04/2019 4:17 PM |
Regional Climate Models are important tools, which are increasingly being used in studies of impacts and adaptation to climate change at local scale. The goal of this work is to assess the climate change over the La Plata Basin, using the Eta Regional model with a resolution of 10 km. Initial and ... |
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03/04/2019 3:05 PM |
Segurança Alimentar e Mudanças Ambientais Globais: uma análise no contexto da sociedade brasileira A agricultura participa tanto das causas como das consequências das mudanças ambientais globais que, por sua vez, podem acentuar a vulnerabilidade da segurança alimentar da sociedade. Por meio de uma visão holística do sistema alimentar, este trabalho traz uma revisão narrativa da literatur... |