Intensive mechanized agriculture in the Brazilian Amazon grew by >3.6 million hectares (ha) during 2001-2004. Whether this cropland expansion resulted from intensified use of land previously cleared for cattle ranching or new deforestation has not been quantified and major implications future dynamics, carbon fluxes, forest fragmentation, other ecosystem services. We combine maps, field surveys, satellite-based information on vegetation phenology to characterize fate large (>25-ha) clearings...

The objective of this paper is to present a method for mapping burnt areas in Brazilian Amazonia using Terra MODIS data. proposed approach based on image segmentation the shade fraction images derived from MODIS, non‐supervised classification algorithm followed by an editing procedure minimizing misclassifications. Acre State, focus study, located western region and undergoing tropical deforestation. extended dry season 2005 affected creating conditions extensive forest fires addition...

The share of electricity generation from Variable Renewable Energy Sources (VRES) has increased over the last 20 years. Despite promoting decarbonization energy mix, these sources bring negative characteristics to such as power ramps, load mismatch, unpredictability, and fluctuation. One ways mitigate is hybridization plants. This paper evaluates benefits hybridizing a plant using an AI-based methodology for optimizing wind–solar ratio based on Brazilian regulatory system. For this study,...

The objective of this work is to assess the wind resources east coast Maranhão, Brazil. Wind profilers were combined with micrometeorological towers and atmospheric reanalysis investigate micro- mesoscale aspects variability. Field campaigns recorded winds in dry wet seasons, under influence Intertropical Convergence Zone. season was characterized by strong (8 12 m s−1) from northeast. Surface heat fluxes generally positive (250 320 W m−2) at midday negative (−10 −20 during night. Convective...

The EOSOLAR project was designed to investigate the structure of atmospheric boundary layer in an equatorial coastal zone, where discontinuity surface conditions induces non-stationarity gradients wind speeds and development internal layers. proposed methodology considers several aspects sea–land transition meteorology that are essential for precisely estimating wind–solar energy potential assessment structural loads on turbines. Infrared (LIDAR) acoustic (SODAR) ground-based remote sensing...

Time series of remote sensing EVI/MODIS data are an important source information to evaluate the direct land conversion sugarcane in response increased ethanol production Brazil. The present work uses a time identify use prior dense cultivated region Paraná State, Some fields were selected over MODIS images acquired during period 2000 2008 order obtain reference perform classification 2005. Using temporal behavior EVI curves it was possible distinguish among pasture land, annual crops and...

O objetivo deste trabalho foi avaliar dados multitemporais, obtidos pelo sensor "moderate resolution imaging spectroradiometer" (MODIS), para o estudo da dinâmica espaço-temporal de duas sub-regiões do bioma Pantanal. Foram utilizadas 139 imagens "enhanced vegetation index" (EVI), produto MOD13 "vegetation index", altimetria oriundos "shuttle radar topography mission" (SRTM) e precipitação "tropical rainfall measuring (TRMM). Para a redução dimensionalidade dos dados, as MODIS-EVI foram...

This paper discusses the relationship between SAR and optical data for an Amazonian test‐site with different land cover types. L‐band HH JERS‐1 Landsat TM images acquired few days apart from each other in 1994 1997 were analyzed. fraction (vegetation, soil, shade) used to characterize terrain features study area. Based on 220 samples randomly distributed over types bands, a regression analysis was performed. Consistent results suggest that may be complementary source of information mapping...

This work presents a methodology that uses digital fraction images derived from Linear Spectral Mixture Model and wavelets transform MODIS satellite sensor time-series for land cover change analysis.Our approach surface reflectance acquired 2000 to 2006 time period.For this study, test site was selected in the Mato Grosso State, Brazilian Amazonia.This has shown high deforestation rates last years.The samples of classes were collected during four field campaigns (2003, 2004, 2005 2006) be...

Mitigation of global carbon emissions to prevent warming potential using biofuels is highly dependent on direct and indirect land use change (LUC). There are still several uncertainties about how assess the LUC impacts biofuels. However, (dLUC) can be evaluated remote sensing (RS). The present work has aim quantify dLUC occurred during recent sugarcane expansion for ethanol sugar production concentrated in South-Central region Brazil. This a favorable climate also great agriculture...

This article seeks to compare the performance of a LIDAR Windcube V2, manufactured by Leosphere, with that SODAR MFAS, Scintec, in evaluating wind speed at different altitudes. The data from these two sensors were collected three locations on Brazilian equatorial margin state Maranhão. comparison aims their simultaneous use points. horizontal velocity components, altitude, showed Pearson correlation values above 0.9 and for vertical component between 0.7 0.85. As sampling efficiency, had...

This article presents the use of multitemporal remote sensing data for monitoring land cover changes in Acre State, western Brazilian Amazonia. For this study, 2000 Landsat ETM+ (ETM+, Enhanced Thematic Mapper Plus), 1990 TM (TM, Mapper) and 1980 MSS (MSS, Multispectral Scanner System) were used. The 2005 2007 Terra MODIS (MODIS, Moderate Resolution Imaging Spectroradiometer) images also used to map deforestation that had occurred during recent years burned areas dry year. ETM+, TM,...

Recently there has been a growing interest in the discovery of antioxidant substances for use food and medicinal products, as substitutes synthetic substances. Propolis object pharmacological studies due to its biological activity amongst properties. In this work, seasonal influence on total phenol content red propolis ethanolic extracts was evaluated, well established correlation between them, capacity being evaluated by different methods (DPPH, H2O2 activity). The results have demonstrated...

O bioma Caatinga representa cerca de 10% do território nacional e tem uma população estimada em 28 milhões habitantes. Sua vegetação arbóreo-arbustiva, adaptada às condições semiaridez, exerce um papel fundamental na manutenção balanço hidrológico, alimentação da matriz energética geração receitas para o país. No entanto, ainda é dos que recebe menor atenção comunidade científica. Diante disso, presente artigo revisão visa apresentar elementos contribuam a atualização estado arte sobre uso...

The work reported in the present paper was performed to honor centennial of fl ight by Alberto Santos Dumont with his 14-Bis aircraft.The describes results for a computational uid dynamics (CFD) analysis aircraft aerodynamics and stability.The geometry generated from historical sources observations.CFD computations were using well-established commercial codes calculation conditions.Simulations considered Reynolds-averaged Navier-Stokes formulation, which turbulence closure achieved Menter's...

In this work, the computational operation based on Gradient Pattern Analysis - GPA was applied for first time in MODIS spatial-temporal images over Amazon region. The study area is located Pará State, eastern Brazilian Amazonia. Using MOD09 8-day composite product from 2000 to 2009 elaborated EVI2 series of area. For each pixel we performed smooth time-series applying wavelets transform method noise reduction. objective characterizing small symmetry breaking, amplitude and phase disorder due...

Remote sensing is based on the interaction of electromagnetic radiation with portion that interacts Earth surface targets. Studies to analyze spectrum reflectance targets by sensor systems could be done terrestrial (laboratory and field), aerial orbital acquisitions. Consequently, for vegetation studies through remote observations necessary know physiology plant studied spectrum, considering solar reaches earth's results in three fractions: one part absorbed, another reflected a third...

The determination of the spatial extent internal boundary layer (IBL) across a step change in surface roughness and heat flux temperature is an important environmental aspect to operation industries, fossil-fuel, nuclear wind power plants. IBL land-water transition zone, such as coastal regions, lakes reservoirs, strongly influenced by properties, stability considerably within this zone. An observational study was conducted measure meteorological properties near large tropical reservoir...

This work presents a methodology that uses fraction images derived from Linear Spectral Mixture Model and wavelets transform MODIS time-series for land cover change analysis. Our approach MODIS/Terra surface reflectance acquired 2000 to 2006 time period. For this study, test site was selected in the Mato Grosso State, Brazilian Amazonia, encompassing several landscape types as tropical forest, savanna, transitional regrowth, deforested areas, croplands pasture. The samples of classes were...

In this study, we present an approach for phenology analysis of Amazon green-up using Linear Spectral Mixing Model applied to Hyperion multitemporal data. The study area was selected in the Tapajo¿s National Forest located Para¿ State, Brazilian Amazonia. region has well-defined dry and wet seasons with yearly rain about 2, 100 mm a season occurring from June October. is primarily covered by dense tropical forest (¿Floresta Ombro¿fila Densa¿) high number emergent tree species. EO-1 data were...