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gilberto fisch   Dr.  Other 
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gilberto fisch published an article in October 2018.
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Renata G. Tedeschi

10 shared publications

College of Engineering, Mathematics and Physical Sciences; University of Exeter; Exeter UK

Siegfried Raasch

6 shared publications

Institute of Meteorology and Climatology, Leibniz University Hannover, 30167 Hannover, Germany

Adaiana F. Gomes Da Silva

3 shared publications

Division of Mechanical Engineering, Technological Institute of Aeronautics (ITA), São José dos Campos, Brazil

Ana Cristina Avelar

3 shared publications

Instituto de Aeronáutica e Espaço (IAE), São José dos Campos, Brasil

Otávio C. Acevedo

3 shared publications

Departamento de Física; Universidade Federal de Santa Maria; Santa Maria Rio Grande do Sul Brazil

5
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23
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Distribution of Articles published per year 
(2014 - 2018)
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4
 
Publications
Article 0 Reads 0 Citations Local Convection and Turbulence in the Amazonia Using Large Eddy Simulation Model Theomar Neves, Gilberto Fisch, Siegfried Raasch Published: 12 October 2018
Atmosphere, doi: 10.3390/atmos9100399
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Using a high resolution model of Large Eddies Simulation (LES), named PALM from PArallel LES Model, a set of simulations were performed to understand how turbulence and convection behave in a pasture and forest sites in Amazonia during the dry and rainy seasons. Related to seasonality, dry period presented higher differences of values (40 W m−2) and patterns over the sites, while in the wet period have more similar characteristics (difference of −10 W m−2). The pasture site had more convection than the forest, with effective mixing and a deeper boundary layer (2600 m). The vertical decrease of sensible heat flux with altitude fed convection and also influenced the convective boundary layer (CBL) height. Regarding the components of turbulent kinetic energy equation, the thermal production was the most important component and the dissipation rate responded with higher growth, especially in cases of greatest mechanical production at the forest surface reaching values up to −20.0.
Article 0 Reads 0 Citations Water security in the Vale do Paraiba´s basin: future scenarios Thiago Adriano Dos Santos, Rodrigo Cesar Da Silva, Gilberto ... Published: 23 November 2017
Ambiente e Agua - An Interdisciplinary Journal of Applied Science, doi: 10.4136/ambi-agua.2156
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This paper presents general aspects of the water budget (including the latest available figures from its components), followed by some characteristics of the rainfall along the Paraiba do Sul watershed. The regional water budget theme is then discussed, taking into account the actual and future rainfall in the region. Finally, reflections and discussions regarding the water security theme (represented by the water transposition from the Paraiba do Sul watershed to the Cantareira´s system) are discussed, as the latter represents the water demand of São Paulo City. The future scenarios of the water availability are estimated using a climatic simulation model.
CONFERENCE-ARTICLE 17 Reads 0 Citations <span>Analysis of Amazon Humidity Transport to South East of Brazil During the Southern Summer (DJF)</span> Murilo Lemes, Gilvan de Oliveira, Gilberto Fisch, Renata Ted... Published: 07 November 2017
First International Electronic Conference on the Hydrological Cycle, doi: 10.3390/CHyCle-2017-04857
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The moisture transport from the Amazon to the Southeast (SE) of Brazil is an important atmospheric mechanism that contributes to the high precipitation rates during the austral summer (DJF) in this region, or more specifically, in the Sao Paulo state (27 and 20oS and longitude between 315 and 305oW). This transport originates from the entrance of moisture from the North Atlantic Ocean, moving to inside of the Amazon (10oS and 3oN, and longitude between 290o and 310oW), where it is supplied by rivers and aerial lakes, resulting of rain forest evapotranspiration. After this supply, the moisture flow is diverted to larger latitudes (South and Southeast) due to the Andes mountain range. Another important system that also assists precipitation in the SE region during the summer period is the frontal systems that are supplied by the transport of this moisture and, when they remain stationary, form a large band of cloudiness with NW / SE orientation, called the South Atlantic Convergence Zone (SACZ), which supplies, along with the frontal systems (on average 5 passes during the summer (DJF)) the SE region. This integrated vertical moisture transport (from the surface up to 500hPa) was studied for the years that occurred El Niño Southern Oscillation (ENSO) events and in neutral years. The results show an intensification of this flow in years of ENSO. In neutral years, thereabout 45.1 kg / kg enter the Amazon territory and thereabout 27.5 kg / kg of this moisture exits, and in the region of São Paulo it receives an average amount of 8.9 kg / kg and loses 7kg / kg. When the ENSO phenomenon occurs, the flow pattern increases significantly in the two regions: the input (54.8 kg / kg) and the outflow (47.4 kg / kg) in Amazon are larger, with São Paulo receiving 42, 2 kg / kg and loses 11.8 kg / kg of all moisture received. In years of ENSO, there is an intensification of the jet stream in the central part of Brazil, blocking the passage of frontal systems. The reduction of precipitation in this period in the SE region by the SACZ is compensated by the greater humidity transport from the Amazon, and therefore, not changing in the precipitation pattern.

Article 3 Reads 0 Citations Estudo do escoamento turbulento atmosférico utilizando ensaios em túnel de vento e simulação numérica Daniel Schuch, Edson R. Marciotto, Otávio Acevedo, Gilberto ... Published: 01 September 2014
Revista Brasileira de Meteorologia, doi: 10.1590/0102-778620130580
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A estrutura do campo de vento e da turbulência atmosférica gerada no interior de uma cavidade rasa é analisada com o uso de ensaios realizados em túnel de vento e simulação numérica com um modelo bidimensional de grandes turbilhões (LES). As cavidades são maquetes estáticas, que podem representar regiões de pequenas clareiras na Amazônia ou de "canyons" urbanos representando a geometria de cidades modernas. Os resultados sugerem que, apesar das diferenças de escalas, a organização da turbulência nos dois experimentos contém similaridades em algumas regiões. Foi verificada a dependência que a intensidade da turbulência, o perfil do vento e termos do balanço de Energia Cinética Turbulenta têm com a velocidade do fluxo livre, com as dimensões (largura) da cavidade e com a posição relativa dentro da cavidade.
Article 3 Reads 1 Citation Avaliação do modelo WRF para a previsão do perfil do vento no centro de lançamento de alcântara Adaiana F. Gomes Da Silva, Gilberto Fisch Published: 01 June 2014
Revista Brasileira de Meteorologia, doi: 10.1590/s0102-77862014000200009
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Foi avaliada a capacidade do modelo WRF-ARW (versão 3.2.1) em prever o vento na região do Centro de Lançamento de Alcântara, visando aplicá-lo operacionalmente em ocasiões de lançamentos naquela base. Foram realizadas análises sazonais ao comportamento do modelo a partir de dois conjuntos de dados de radiossondagens representativos das estações seca (vento forte) e chuvosa (vento fraco). Previsões de 72 horas foram feitas a partir de condições iniciais fornecidas pelo Global Forecasting System (GFS/NCEP). Simulações configuradas para três domínios aninhados, resolução horizontal máxima de 1 km e vertical de 42 níveis foram comparadas com observações a cada 6 horas através do índice de concordância de Willmott (d). Foram realizados testes iniciais de sensibilidade para comparação e ajuste de diferentes parâmetros dinâmicos e físicos, como tamanhos de domínios, número de níveis verticais, spin-up time e parametrizações de Camada Limite Planetária. O modelo se mostrou razoável para representar o perfil vertical do vento, dentro de suas limitações, não mostrando diferença em seu desempenho entre as estações seca ou chuvosa e alcançando valores máximos de d na ordem de 0,90. Em geral, o modelo superestimou as componentes do vento (U e V) médias na camada em até 3,0 m/s com relação às observações.
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