Convective Systems
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. SPATIAL, SEASONAL, AND TEMPORAL VARIATIONS IN RAINFALL AGGRESSIVENESS IN THE SOUTH OF BRAZIL
ABSTRACT The objective of this study is to evaluate spatial and temporal variations in rainfall aggressiveness in southern Brazil. A total of 181 rain gauge stations located in southern Brazil with rainfall time series from 1976 to 2015 were used. Seasonal and annual rainfall aggressiveness values measured according to the Modified Fournier Index (MFI) were
Eng. Agríc.. Publicado em: 12/08/2019
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2. Características dos sistemas convectivos de mesoescala nas simulações climáticas do RegCM4 / Characteristics of Mesoscale Convective Systems in the climate simulations of RegCM4
Técnicas de rastreamento como o Forecasting and Tracking the evolution of Cloud Clusters (ForTraCC) e simulações numéricas têm sido utilizadas para entender o desenvolvimento de sistemas convectivos de mesoecala (SCMs), que estão associados à precipitação intensa, rajadas de vento, granizo e até mesmo tornados. Este trabalho adaptou o ForTraCC para
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/10/2012
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3. Comparative analysis of mesoscale convective complexes using models simulations and satellite observations / Análise comparativa de complexos convectivos de mesoescala através de simulações de modelo e observações de satélite
In this study was analyzed the behavior of the Mesoscale Convective Complexes (MCC) that occurred in the South Central region of South America (40°S-15°S and 80°W e 30°W). The period chosen for the study of these systems was between September to March for the years 2007 and 2010. The FORTRAC tool was used to identify MCCs and found 43 systems. The period
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2011
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4. Transient solidification of alloys of the monotectic AI-Bi, AI-Pb and AI-In systems / Solidificação transitória de ligas dos sistemas monotéticos AI-Bi, AI-Pb e AI-In
Aluminum alloys dispersed with bismuth, lead and indium show promising applications in wearresistant automotive components. Such dispersions of low melting temperature elements decrease hardness and flow easily under sliding conditions, resulting in favorable tribological behavior. Much research has been devoted in order to better comprehend the distinct m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/04/2011
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5. On the modelling of rotational effects in the lower convective region of the sun
The purpose of this work is to study effects of differential rotation in the lower convective region of the Sun. Similar to MHD case; the governing equations are separated in variables, allowing numerical integration in this layer. This algorithm facilitates solutions of more complicated systems, with less computing time. Two different known rotation profile
Brazilian Journal of Physics. Publicado em: 2010-06
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6. Impacto da assimilação de dados de precipitação no sistema RPSAS/CPTEC: um estudo de caso de complexo convectivo de mesoescala / Impact of precipitation assimilation in CPTEC s RPSAS system: a case study of mesoscale convective system
This work presents the results of a impact study of estimated precipitation data assimilation in RPSAS from CPTEC, during January 2003. In this study, the precipitation assimilation was performed during the generation of first guess by the regional Eta model using a methodology similar to nudging. From this first guess, the RPSAS system generates an analysis
Publicado em: 2010
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7. Análise térmica de um componente eletrônico em um equipamento de telecomunicação / Thermal analysis of electronic component from telecomuni-cation equipment
Determinar o coeficiente de transferência de calor por convecção local sobre um com-ponente eletrônico dentro de um equipamento de telecomunicação em operação não é uma tarefa trivial, pois muitas variáveis do sistema térmico são desconhecidas e difíceis de serem mensuradas. A análise térmica no presente trabalho tem como objetivo estimar as
Publicado em: 2010
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8. Impacto da assimilação de dados de precipitação no sistema RPSAS/CPTEC: um estudo de caso de complexo convectivo de mesoescala / Impact of precipitation assimilation in CPTEC s RPSAS system: a case study of mesoscale convective system
O presente trabalho apresenta os resultados de um estudo de impacto da assimilação de dados de precipitação estimada do Tropical Rainfall Measuring Mission (TRMM) no Regional Physical-space Statistical Analysis System (RPSAS) do Centro de Previsão de Tempo e Estudos Climáticos (CPTEC), durante o mês de janeiro de 2003. Neste estudo, a assimilação de
Publicado em: 2010
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9. Calibrando a microfísica de nuvens do modelo RAMS a partir dos dados coletados pelo ALPA. / Calibrating the cloud microphysics of the RAMS model from data collected by ALPA.
This work presents curve fittings for observed cloud droplet spectra as well as sensitivity tests to cloud microphysics parameters in RAMS 6.0 model, in order to attain a better configuration of this model for use in the state of Ceará. The methodology is based on comparisons between model results and observations collected during the ―Cloud Microphys
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2009
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10. Lightning study in association of mesoscale convective systems in the Southest region of Brazil / Estudo das Descargas Elétricas Atmosféricas associadas a sistemas convectivos de mesoescala para a Região Sudeste do Brasil
In this work it is presented the study of 6 years of detected lightning data in association to the occurrence of mesoscale convective systems in the region located between 15S - 27S and 35W - 55W. The Lightning data were provided by FURNAS Centrais Elétricas S.A. for the period 2002-2007. Geostationary satellite images, enhanced in the infrared channel, wer
Publicado em: 2009
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11. Relationship between physical properties convective clouds and cloud-ground lightining / Relações das propriedades físicas das nuvens convectivas com as descargas elétricas
The knowledge of physical and microphysical properties associated to cloud-ground lightning occurrence is very important for determination of potential forecast parameters of electrical discharges activity. The identification of these parameters could give valuable contribution for different segments of society, such as the sectors of electric energy distrib
Publicado em: 2009
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12. Rainfall short-term forecast in the surveillance area of São Paulo weather radar. / Previsão de chuva a curtíssimo prazo na área de abrangência do radar meteorológico de São Paulo
The evaluation of the rainfall short-term forecast up to 3 hours in advance within the surveillance area of São Paulo weather radar (RSP) for different types of precipitating systems, mainly the are associated to floods and landslides in Metropolitan Area of São Paulo (RMSP), was carried out with an 2D wind advective scheme and rainfall rates estimated wit
Publicado em: 2009