Mesoscale
Mostrando 25-36 de 71 artigos, teses e dissertações.
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25. Análise da trajetória e da circulação de sistemas precipitantes / Analysis of the trajectory and circulation of the precipitating systems
A partir da técnica " extit{Least Square- Velocity Azimuth Display}" aplicada aos dados de velocidade radial, obtida a partir da varredura volumétrica de um dos radares da rede do Departamento de Controle do Espaço Aéreo, foi obtida uma metodologia que permite a recuperação do vento médio horizontal. Além disso, com a sequência temporal dos perfis v
Publicado em: 2010
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26. Processos hidrossedimentolÃgicos e conectividade em bacia semiÃrida: modelagem distribuÃda e validaÃÃo em diferentes escalas / Hydrossedimentologic processes and connectivity in a semiarid catchment: distributed modelling and validation at different scales
A deficiÃncia hÃdrica em regiÃes semiÃridas, como o Nordeste do Brasil, representa um dos principais fatores limitantes ao desenvolvimento econÃmico, com graves consequÃncias sociais. Para garantir a conservaÃÃo dos recursos hÃdricos disponÃveis, Ã imprescindÃvel o controle de aÃÃes antrÃpicas que impactem negativamente a disponibilidade hÃdr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2009
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27. 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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28. ZIMORA - UM MODELO NUMÉRICO 3D DE DISPERSÃO ATMOSFÉRICA / ZIMORA - A 3D NUMERICAL MODEL FOR ATMOSPHERIC DISPERSION
In this thesis, we presents a development and validation of a 3D numerical model for the advection-diffusion equation. Models of this kind has been developed for scientific investigations and to support atmospheric emissions control and environmental policy decisions. To develop this model, we used the computational implementation of an explicit numerical sc
Publicado em: 2009
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29. Barotropic instability process of Brazil current at Santos Basin / Processos de instabilidade barotrópica da Corrente do Brasil na Bacia de Santos
The Brazil Current (BC) is formed at the bifurcation of the southern branch of the South Equatorial Current and flows south-southeastward off the east, southeast and southern Brazilian continental margin, exhibiting intense meso-scale activity between the Vitória-Trindade Ridge (20oS) and Cape Santa Marta Grande (28oS). The knowledge of such activity, built
Publicado em: 2009
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30. 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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31. Space-temporal behavior of rainfall in Southern Brazil using TRMM and SRTM data / Comportamento espaço-temporal da precipitação na Região Sul do Brasil utilizando dados TRMM e SRTM
This work investigates the space-temporal behavior of rainfall in Southern Brazil during the 1988 and 2007 period. The evaluation was based on three features: 1) climatological aspects, 2) geographic trends from relief features, and 3) main variability modes. Two complementary data sets of rainfall were used: rain gauges and rainfall estimates from the Tropi
Publicado em: 2009
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32. Study of a convective situation (growth-dissipation) using data from Doppler meteorological radar in Manaus / Estudo de uma situação convectiva (iniciação-dissipação) utilizando dados do radar meteorológico doppler de Manaus
Os Sistemas Convectivos de Mesoescala (SCM) são sistemas característicos da região amazônica, esta região possui fatores favoráveis a formação da atividade convectiva, ou seja, elevados valores de temperatura e umidade do ar. Estes sistemas normalmente ocasionam ventos fortes, descargas elétricas atmosféricas e ocasionalmente, granizo, além de exp
Publicado em: 2009
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33. Assimilação de dados das estações meteorológicas automática da FUNCEME. / Assimilation of data from automatic weather stations FUNCEME.
An observed data assimilation (ODA) technique is evaluated regarding its effects on the performance of a mesoscale atmospheric model (Regional Atmospheric Modeling System, RAMS 6.0) in a weather forecast simulation for the five first days of January 2005, which represents a transitional period in the wind regime over northern Northeast Brazil (between the dr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/08/2008
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34. Experimentos com o modelo regional eta em diferentes configurações durante o período salljex e mecanismos de mesoescala associados ao desenvolvimento de scm / Experiments with the regional eta model in different settings during the salljex period and mesoescale mechanisms associated with MCS development
The rainfall regime over southern Brazil, Uruguay and northern Argentina is strongly influenced by Mesoscale Convective Complexes (MCCs) that develop during night time associated with the Low Level Jet (LLJ) to the east of Andes. As they are mesoscale systems, their predictability depends on the model resolution and ability in representing the main features
Publicado em: 2008
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35. Variabilidade atmosférica associada a casos extremos de precipitação na Região Sudeste do Brasil / Atmospheric variability associated to estreme precipitation events over southeast region of Brazil
The most severe climate impacts on the society occur due to climate variability and extreme precipitation events. Therefore, their study on various space and time scales are important to determine, in details, the related aspects and thus to provide information to analyze their representations in numerical forecast models. The goal of this work is to study v
Publicado em: 2008
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36. Structural geology of northern limb of the Paraiba do Sul river divergent structure: cross-sections Três Rios (RJ) - Matias Barbosa (MG) and Barra do Piraí - Conservatória (RJ) / Geologia estrutural da aba norte da estrutura divergente do rio Paraíba do Sul: seções Três Rios (RJ) - Matias Barbosa (MG) e Barra do Piraí - Conservatório (RJ)
This study is about the structural geology of a portion of the Central Mantiqueira Province which corresponds to the north side of the structural divergence of the Rio Paraíba do Sul valley. Two geological cross-sections (Três Rios - Matias Barbosa and Barra do Piraí - Conservatória) provided geometrical and kinematics data. Lattice preferred orientation
Publicado em: 2008