Weather Forecast Model Performance
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Avaliação da Habilidade do Modelo WRF em Representar a Precipitação na Amazônia Usando Diferentes Escalas
Resumo A precipitação no norte da Amazônia dos verões e outonos austral, do período de 1988 a 1999, foi simulada utilizando o modelo regional Weather Research and Forecasting (WRF), através de uma abordagem em escalas distintas, com domínios aninhados de 45 e 15 km. As condições iniciais e de contorno foram obtidas da Climate Forecast System Reanaly
Rev. bras. meteorol.. Publicado em: 05/08/2019
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2. Verificação da previsão do tempo em São Paulo com o modelo operacional WRF / Review of weather in São Paulo with the WRF Operational Model.
Forecasts of daily maximum and minimum temperatures and rainfall performed by the operational numerical weather prediction WRF (Weather Research Forecasting) model in the São Paulo are evaluated. Initial and boundary conditions provided by the 00UTC Global Forecast System (GFS) Model and WRF run for 72 hours, with two nested grids (with horizontal grid spac
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/11/2012
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3. Dynamic load-balancing : a new strategy for weather forecast models
Weather forecasting models are computationally intensive applications and traditionally they are executed in parallel machines. However, some issues prevent these models from fully exploiting the available computing power. One of such issues is load imbalance, i.e., the uneven distribution of load across the processors of the parallel machine. Since weather
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Assimilação de dados com redes neurais artificiais em modelo de circulação geral da atmosfera / Data assimilation with artificial neural networks in atmospheric general circulation model
Weather forecasting systems require a model for the time evolution and an estimate of the current state of the system. The numerical weather prediction (NWP) incorporates the equations of atmospheric dynamics with physical process and it can predict the future state of the atmosphere. Data assimilation provides such an initial estimate of the atmosphere wher
Publicado em: 2010
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5. 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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6. Estudo das características das perturbações EOF extratropicais e seu impacto na previsão de tempo de médio prazo por conjunto
- The characteristics of the extratropical EOF perturbations are studied and their impact on the medium range ensemble weather prediction is evaluated, using simulations with the Center for Weather Prediction and Climate Studies Ensemble Weather Prediction System (CPTEC-EPS). The EOF method, originally applied over tropical regions and for horizontal wind an
Publicado em: 2008
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7. Prognóstico das variáveis meteorológicas e da evapotranspiração de referência com o modelo de previsão do tempo GFS/NCEP / Prediction of meteorological variables and reference evapotranspiration with GFS/NCEP weather forecast model
Avaliou-se o desempenho de um modelo numérico de previsão do tempo (GFS - Global Forecast System antigo AVN AViatioN model - do Centro Nacional para Previsão Ambiental NCEP) no prognóstico de variáveis meteorológicas temperatura, déficit de pressão de vapor do ar, saldo de radiação e velocidade do vento, e da evapotranspiraçã
Publicado em: 2007
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8. Brams operacionalization applyed to weather forecast, agriculture and research / Operacionalização do modelo Brams aplicado à previsão do tempo, agricultura e pesquisa
The central aim of this work is to put available to the cientific community, weather forecaster and the general population an automatic tool to numerical forecast. In this sense it was installed and shapped a cluster that aims to put available to the system a high power of processing. The cluster structrure is based on an equipamento type H3P (High performan
Publicado em: 2006
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9. Previsão e análise sobre as regiões sudeste e sul do Brasil utilizando redes neurais artificiais / Forecast and analysis of rainfall over south and southeastern Brazil using artificial neural network
This study uses an Artificial Neural Network (ANN) technique to establish a non-linear relationship between the large scale atmospheric circulation and local surface rainfall. The method involves the use of statistical downscaling applied to outputs from Eta model. In this sense, prognostic equations were developed for 18 locations using the ANN. This method
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2003
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10. Forecast and analysis of rainfall over south and southeastern Brazil using artificial neural network / Previsão e análise sobre as regiões sudeste e sul do Brasil utilizando redes neurais artificiais
This study uses an Artificial Neural Network (ANN) technique to establish a non-linear relationship between the large scale atmospheric circulation and local surface rainfall. The method involves the use of statistical downscaling applied to outputs from Eta model. In this sense, prognostic equations were developed for 18 locations using the ANN. This method
Publicado em: 2003
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11. Impacto da condição inicial de água no solo na previsão de verão da América do Sul / Impact of the initial soil water condition in the summer forecast of the South America
The objective of this work was to evaluate the impact of the initial soil water condition in the summer forecasts of the South America. The regional Eta model coupled to the land surface scheme SSiB was used in the accomplishment of the experiments. Three groups of experiments had been considered in integration of 3 months, all initialized with the observed
Publicado em: 2002
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12. The impact of eta model nesting on the weather forecasts. / O impacto do aninhamento no modelo Eta nas previsões de tempo.
The increase of resolution of a Limited Area Model usually brings forecast improvements, since the phenomena are more detailed. A high resolution regional model nested in a global model of low resolution is computationally cheaper, however this type of nesting may cause inconsistencies in the representation of the physical processes betewen the two models. I
Publicado em: 2001