Wind Meteorology
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Sensitivity tests and evaluation of ETA model near-surface wind forecast for nordeste region / Testes de sensibilidade e avaliação das previsões de vento do modelo ETA para região nordeste
A camada limite superficial é a parte da camada limite planetária mais influenciada pelas características da superfície da Terra. A previsão de vento nesta camada é útil em várias atividades humanas, no setor energético, no planejamento das operações de transporte aéreo, no lazer e etc. O objetivo principal desse estudo foi realizar testes de sen
Publicado em: 2007
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14. Testes de sensibilidade e avaliação das previsões de vento do modelo ETA para região nordeste / Sensitivity tests and evaluation of ETA model near-surface wind forecast for nordeste region
A camada limite superficial é a parte da camada limite planetária mais influenciada pelas características da superfície da Terra. A previsão de vento nesta camada é útil em várias atividades humanas, no setor energético, no planejamento das operações de transporte aéreo, no lazer e etc. O objetivo principal desse estudo foi realizar testes de sen
Publicado em: 2007
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15. Fronts and frontogenesis during summer: geometrical and dynamical aspects and the influence over rainfall on the South American subtropics / Frentes e frontogênese no verão: aspectos geométricos, dinâmicos e impactos sobre as chuvas nos subtrópicos da América do Sul
Three different aspects related to summer precipitation over subtropical South America (SA) and the continental pattern of humidity transport in that season are studied. Firstly, a climatological point of view is adopted and it is shown that most of the humidity that enters SA through its northern coast, up to Par´a, comes from the tropical Northern Atlanti
Publicado em: 2007
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16. Padrões sinóticos de circulação atmosférica associados ao jato em baixos níveis a leste da Cordilheira ds Andes, na América do Sul / Atmospheric circulation patterns associated with the south america low level jet at east of the Andes
The objective of this studywas toidentify the atmospheric patterns circulationassociated with the South American Low-level Jet (LLJ). The zonal (u) and meridional (v) wind, geopotential height (f), temperature (T), specific humidity (q) and other variables from National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2006
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17. Instrusion of the potential vorticity in the upper troposferic over south tropical atlantic and its relation with precipitation over NE of Brazil / Intrusão de vorticidade potencial na alta troposfera sobre o Atlântico tropical sul e sua relação com a precipitação no NE do Brasil
The Northeast Brazil (NEB) presents a great interannual variability of precipitation that can probably be explained by some atmospherics phenomenon of large scale. A system that can have some relationship with this variability is the intrusion event, characterised by Rossby wave breaking that provokes a connection between the tropical and extratropical regio
Publicado em: 2006
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18. Atividade Convectiva no Sul da América do Sul / Mesoscale Convective Systems (MCS) at South of South America
In this work synoptic and mesoscale aspects are analyzed in association to the formation of Mesoscale Convective Systems (MCS) at South of South America (SA) that reached the State of Rio Grande do Sul (RS) in some moment during its life time. The selected period involves the month of February of the years 2002 to 2005. Among the identified MCS, two cases ha
Publicado em: 2006
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19. Análise de uma linha de instabilidade costeira na região leste do Estado do Pará / Analysis of a Coastal Instability Line East of the State of Pará
At the State of Pará it is observed, mainly in the months May to August, Instability Lines that formed along the coastal line, called Coastal Instability Lines (CIL) because of that. This work has the objective to study the CIL that occurred during the “Experimento de Campo de Período Chuvoso” of the DESMATA-MilênioLBA Project, in April 2002.
Publicado em: 2005
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20. Validation of heat fluxes over the tropical atlantic: CPTEC coupled ocean-atmosphere model and observations / Validação dos fluxos de calor sobre o atlântico tropical: modelo acoplado oceano-atmosfera do CPTEC e observações
The goal of this work is to infer the importance of surface heat fluxes, estimated by several methods, in the determination of the Sea Surface Temperature (SST) fields in the tropical Atlantic using a set of general circulation ocean model Modular Ocean Model 3 (MOM 3) simulations and a Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) coupled ocean
Publicado em: 2005
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21. Anemometer Based on the Method of Time of Transit: Comparative study of architectures, evaluation of uncertainties and implementation. / Anemômetro Baseado no Método de Tempo de Trânsito: Estudo comparativo de arquiteturas, avaliação de incertezas e implementação.
Anemometers are instruments, simply, for measuring the velocity of fluids and, in some cases, its direction. Particularly, the measurement of the air velocity extends to applications like: windmills, wind tunnels, electricity generation from Aeolian energy and meteorology. Among the most used methods for the wind velocity determination, the method based on t
Publicado em: 2004
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22. Implementação de uma rede neural artificial para associação de imagens de radar meteorológico e dados de descargas elétricas / A combination of weather radar images and electrical discharges using an artificial neural network
This work uses radar images together with data of electrical discharges derived from a lightning localization system taken with a Doppler Meteorological Radar as the input to a Neural Network (NN), in order to stablish the non-linear relationship between the reflectivity in the radar images and the atmospheric discharges. Associating these atmospheric discha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2003
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23. A combination of weather radar images and electrical discharges using an artificial neural network / Implementação de uma rede neural artificial para associação de imagens de radar meteorológico e dados de descargas elétricas
This work uses radar images together with data of electrical discharges derived from a lightning localization system taken with a Doppler Meteorological Radar as the input to a Neural Network (NN), in order to stablish the non-linear relationship between the reflectivity in the radar images and the atmospheric discharges. Associating these atmospheric discha
Publicado em: 2003
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24. Estudo das camadas limites planetárias marinha e continental na região do Centro de Lançamento de Alcântara / Study the planetary boundaries layers marine and continental in region of the Alcântara Space Launching Center
The Planetary Boundary Layer (CLP) over the ocean and continent is investigated at the north part of the Maranhão State coastline. With this purpose, the structure these CLPs is examined using observational data and numerical studies. Simultaenous radiossonde data were collacted and used in this study. The tri-dimensional mesoecale model (RAMS) is applied t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/04/2002