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
Investigations on concentric gravity wave sources over the brazilian equatorial region.
Observations of concentric gravity waves (CGWs) in the OH airglow emission over the Brazilian equatorial region are presented. An all-sky imager installed at Sao Joao do Cariri [7.4 degrees S, 36.5 degrees W] was used to acquire near-infrared OH images. Using over 19 years of observational data from...
por Portal Padrão
publicado
26/10/2022
3:07 PM
Intercomparison of planetary boundary layer heights using remote sensing retrievals and ERA5 reanalysis over central Amazonia.
The atmospheric boundary layer height ((Formula presented.)) is a key parameter in the vertical transport of mass, energy, moisture, and chemical species between the surface and the free atmosphere. There is a lack of long-term and continuous observations of (Formula presented.), however, particular...
por Portal Padrão
publicado
26/10/2022
3:03 PM
DETER-R: An operational near-real time tropical forest disturbance warning system based on Sentinel-1 time series analysis.
Continuous monitoring of forest disturbance on tropical forests is a fundamental tool to support proactive preservation actions and to stop further destruction of native vegetation. Currently most of the monitoring systems in operation are based on optical imagery, and thus are flaw-prone on areas w...
por Portal Padrão
publicado
26/10/2022
3:02 PM
Compound impact of land use and extreme climate on the 2020 fire record of the Brazilian Pantanal
Aim Our aim was to quantify the influence of climate and land use on major fires that occurred during the 2020 drought over the Brazilian Pantanal region. Location Alto Paraguay Basin, central-western flank of Brazil. Time period 2003-2020. Methods We calculated climatic and burned area anomalies an...
por Portal Padrão
publicado
26/10/2022
2:57 PM
The influence of diethylaniline and toluene on the streamer propagation in cyclohexane between a point-plane gap under positive impulse voltage stress.
Liquid insulation is used in high voltage equipment such as power transformers as both dielectric medium and coolant. Breakdown in liquid insulation tends to be governed either by streamer initiation under more uniform fields, or by streamer propagation under more non-uniform fields. A model streame...
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