Comparação entre os modelos digitais de terreno gerados por radar em banda P e LiDAR na Amazônia, um estudo de caso no Amapá (Brasil).
The Digital Terrain Model (DTM) is an important product used in geosciences, but its extraction in dense forest areas is still a challenge. One of the major difficulties in extracting a DTM via remote sensors is in dense forest areas, as the generated information becomes degraded due to the fact tha...
por Portal Padrão
publicado
07/08/2023
2:39 PM
Using simulated GEDI waveforms to evaluate the effects of beam sensitivity and terrain slope on GEDI L2A relative height metrics over the Brazilian Amazon Forest.
The vertical structure of forests provides important parameters for estimating aboveground biomass (AGB) and it can be measured by lidar sensors. The Global Ecosystem Dynamics Investigation (GEDI) full-waveform lidar sensor collects data systematically over the Earths surface from the International ...
por Portal Padrão
publicado
04/08/2023
4:41 PM
Genetic viability and habitat suitability of the critically endangered southern muriqui (Brachyteles arachnoides) in the Atlantic Forest’s fragmented landscapes under land use and climate change scenarios.
The joint effects of climate change and landscape fragmentation to the genetic viability of isolated populations has barely been addressed for the Atlantic Forest fauna. Therefore, this work explored the potential habitat suitability for the southern muriqui (Brachyteles arachnoides), by modeling cl...
por Portal Padrão
publicado
04/08/2023
4:28 PM
Current policies are insufficient to protect or restore Brazil’s cost-effective conservation priority zones.
In Brazil, conservation priority zones, in spite of their key role in preserving natural vegetation and its environmental resources are frequently located outside the country's public network of protected areas (PAs). Here we present the first study on land-use impacts inside Brazil's unprotected (i...
por Portal Padrão
publicado
04/08/2023
4:07 PM
Upward leaders initiated from instrumented lightning rods during the Approach of a downward leader in a cloud-to-ground flash.
In this paper we analyze electric-field and current measurements of upward leaders induced by a downward negative lightning flash that struck a residential building. The attachment process was recorded by two high-speed cameras running at 37,800 and 70,000 images per second and the current measured...
por Portal Padrão
publicado
04/08/2023
4:01 PM
Accurate species distribution models: minimum required number of specimen records in the Caatinga biome.
Species distribution models (SDMs) are one of the most widely used tools to predict areas with potential for occurrence of native, invasive and endangered species, based on current and future environmenal and climate conditions. Despite their global use, evaluating the accuracy of SDMs based only on...
por Portal Padrão
publicado
04/08/2023
3:54 PM
Análise Episódica do Downburst do dia quatorze de fevereiro de 2018, no município do Rio de Janeiro.
Desde o século XVIII o Rio de Janeiro é afetado por eventos extremos de precipitação, os quais acarretam uma série de transtornos no espaço urbano, por meio de inundações e movimentos de massa. Dentre inúmeros eventos, o ocorrido no dia quatorze de fevereiro de 2018, possui características...
por Portal Padrão
publicado
04/08/2023
3:51 PM
Climate projections of precipitation and temperature in cities from ABC Paulista, in the Metropolitan Region of São Paulo-Brazil.
Cities are increasingly vulnerable to climate change's impacts and poorly adapted to extreme variability. This study aimed to evaluate climate projections of air temperature and precipitation in seven cities in the Metropolitan Region of São Paulo that correspond to the Greater ABC Paulista. We use...
por Portal Padrão
publicado
04/08/2023
3:17 PM
Idealized hydrodynamical numerical model dataset with no-river runoff at the western tropical North Atlantic.
The western tropical North Atlantic (WTNA) is a very complex region, with the influence of intense western boundary currents in connection with equatorial zonal currents, important atmospheric forcings (e.g Intertropical Convergence Zone), mesoscale activities (e.g NBC rings), and the worlds largest...
por Portal Padrão
publicado
04/08/2023
3:14 PM
Computational methods of EEG signals analysis for Alzheimer’s disease classification.
Computational analysis of electroencephalographic (EEG) signals have shown promising results in detecting brain disorders, such as Alzheimer's disease (AD). AD is a progressive neurological illness that causes neuron cells degeneration, resulting in cognitive impairment. While there is no cure for A...
por Portal Padrão
publicado
04/08/2023
3:08 PM
Estimating public transport emissions from General Transit Feed Specification data.
This paper introduces the gtfs2emis model, a bottom-up method available as an R package to estimate emissions of public transport systems. The method uses General Transit Feed Specification (GTFS) data, a standard format for public transport data widely adopted worldwide, which makes the method easi...
por Portal Padrão
publicado
04/08/2023
3:05 PM
Socio-environmental vulnerability to drought conditions and land degradation: an assessment in two northeastern Brazilian river basins.
over the past few decades, a significant amount of agricultural land has been lost due to soil degradation/desertification. in addition, the increasing frequency of extreme events, such as intense droughts and forest fires, has negatively impacted various ecosystem services. two of the main brazilia...
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