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Forecast of convective events via hybrid model: WRF and machine learning algorithms.

This presents a novel hybrid 24-h forecasting model of convective weather events based on numerical simulation and machine learning algorithms. To characterize the convective events, 13-year from 2008 up to 2020 of precipitation data from the main airport stations in Rio de Janeiro, Brazil, and atmo...
  • por Portal Padrão
  • publicado
  • 01/12/2022
  • 3:40 PM

Performance of an automated conservation status assessment for the megadiverse vascular flora of Brazil.

Conservation status assessments are one of the key scientific measures to inform solutions aiming at minimizing the biodiversity crisis of the Anthropocene, being the IUCN's Red List approach the most widely used and accepted tool for species-level assessment. However, Red Lists are time-consuming b...
  • por Portal Padrão
  • publicado
  • 01/12/2022
  • 3:09 PM

Potential use of space-based lightning detection in electric power systems.

Information about lightning activity and its parameters is necessary to design and evaluate the lightning protection of an electrical power system. This information can be obtained from ground-based lightning detection networks that provide information on cloud-to-ground lightning strikes with a loc...
  • por Portal Padrão
  • publicado
  • 01/12/2022
  • 3:05 PM

Regionalization of climate change simulations for the assessment of impacts on precipitation, flow rate and electricity generation in the Xingu River basin in the Brazilian Amazon.

This study applied regionalization techniques on future climate change scenarios for the precipitation over the Xingu River Basin (XRB) considering the 20212080 horizon, in order to assess impacts on the monthly flow rates and possible consequences for electricity generation at the Belo Monte Hydroe...
  • por Portal Padrão
  • publicado
  • 23/11/2022
  • 3:42 PM

Assessment of CMIP6 models’ performance in simulating present-day climate in Brazil

Brazil is one of the most vulnerable regions to extreme climate events, especially in recent decades, where these events posed a substantial threat to the socio-ecological system. This work underpins the provision of actionable information for society's response to climate variability and change. It...
  • por Portal Padrão
  • publicado
  • 23/11/2022
  • 3:39 PM

Climatic control effect on the soil nitrogen isotopic composition in Alisols across the physiographic regions of Pernambuco State, Northeast Brazil.

Soil nitrogen dynamics in terrestrial ecosystems can be evaluated by analyzing the natural abundances of N isotope ratio mass spectrometry (δ15N) because δ15N integrates decades of organic matter transformations in the soil. On a large scale, the δ15N of soil organic matter across climate gradien...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:42 PM

Forcing mechanisms of the circulation on the Brazilian Equatorial Shelf.

The Brazilian Equatorial Shelf (BES) is a very dynamic region due to the influence of various forcings: trade winds, macrotides, the Amazon River, and the North Brazil Current (NBC). To investigate each forcing's role in BES circulation, a control simulation and three sensitivity simulations (withou...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:40 PM

Recent extreme drought events in the Amazon rainforest: assessment of different precipitation and evapotranspiration datasets and drought indicators.

Over the last decades, the Amazon rainforest has been hit by multiple severe drought events. Here, we assess the severity and spatial extent of the extreme drought years 2005, 2010 and 2015/16 in the Amazon region and their impacts on the regional carbon cycle. As an indicator of drought stress in t...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:40 PM

Surface and atmospheric patterns for early and late rainy season onset years in South America.

The biosphereatmosphere interactions associated with the rainy season onset in South America (SA) are not well understood. This study aimed to analyze the atmospheric and surface patterns associated with early, neutral, and late rainy season onset in tropical regions of SA. The following years repre...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:16 PM

Income inequality and the geography of residential burglaries: A spatial model applied to Campinas.

Although income inequality has been often pointed out as an important cause of crime, it is yet unclear how spatial patterns of income in a city can explain its geography of crime. In this study, we apply a model to test the influence of income inequality on the spatial concentration of residential ...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:14 PM

Ground-based and satellite measurements of solar spectral irradiances at 305 nm and 380 nm at a tropical site.

The solar radiation has been monitored through ground-based and satellite instruments all over the world for decades. This is also important for both checking and validation of satellite probing. In this work, we compare spectral irradiances at 305 nm (UV-B) and 380 nm (UV-A) from a ground-based rad...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:14 PM

Tecnologias sociais na redução da vulnerabilidade às mudanças climáticas nos municípios do Ceará, Brasil.

As previsões climáticas para o Semiárido Brasileiro nesse século incluem aumento da temperatura do ar, redução das chuvas e aridização. As previsões alertam também para danos em sistemas humanos que já enfrentam uma infinidade de outras ameaças, requerendo que a vulnerabilidade nesses si...
  • por Portal Padrão
  • publicado
  • 26/10/2022
  • 3:11 PM