Meteorological Radar
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Development of software for studies of precipitation using radars and satellite / Desenvolvimento de software para estudos de precipitação usando radares e satélites
The joint analysis of meteorological satellite and radar images is performed in order to correlate the precipitation structures observed in both images. The study of such correlation allows the extension of the radar range. This task is currently performed by hand, in a non systematical way, making use of several computer programs. This work presents the Rad
Publicado em: 2010
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2. Análise dinâmica, termodinâmica e microfísica de uma linha de instabilidade com o radar meteorológico móvel MXPOL / Microphysical, dynamic and thermodynamic analysis of a squall line using the mobile meteorological radar MXPOL
A prefrontal squal line (LI) that reached tne metropolitan area of São Paulo on April 26 2007 was monitored and analyzed by means of of surface and upper air measurements, weather radar and satellite data. Analyses indicate a favorable synoptic environment to form and sustain the LI. In its genesis region there was relatively warm and moiture air near the s
Publicado em: 2010
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3. Análise de dados de sistema LIDAR de retroespalhamento correlacionada com dados meteorológicos / Data analysis of a backscattering LIDAR system correlated with meteorological data
Nestes últimos anos, tivemos um aumento no interesse na monitoração dos efeitos da atividade humana sobre a atmosfera e o clima no planeta. O uso de técnicas de sensoriamento remoto têm sido utilizados em diversos estudos, inclusive em estudos relacionados à mudanças globais. Um sistema LIDAR de espalhamento, primeiro deste tipo no Brasil, tem sido us
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/04/2009
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4. 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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5. Numerical simulation of the rainfall diurnal cycle over the amazon basin during the rainy season / Simulação numérica do ciclo diário da precipitação sobre a bacia amazônica durante a estação chuvosa
The diurnal cycle is the climatic mode directly modulated by surface forcing. Numerical models fail to simulate it, especially over the continental areas during the warm season. Previous studies show that in the Amazon Basin the maximum rainfall is simulated around four hours before to the one observed with rain gauges. Thus, this work emphasizes the importa
Publicado em: 2009
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6. Simulação numérica do ciclo diário da precipitação sobre a bacia amazônica durante a estação chuvosa / Numerical simulation of the rainfall diurnal cycle over the amazon basin during the rainy season
Ciclo diário é o modo de variabilidade do clima que responde primariamente às forçantes de superfície. Modelos numéricos apresentam deficiência em simulá-lo principalmente sobre áreas continentais durante o verão. No caso da Bacia Amazônica, mostra-se que o máximo de precipitação simulado é adiantado em cerca de quatro horas relativamente às
Publicado em: 2009
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7. Pronostico inmediato de tormentas convectivas por radar: una actualizacion
One of the main applications of the meteorological radar is the nowcasting (some tens of minutes to some hours forward) of convective precipitation events. It has a great importance since this is the space of time in which the numerical forecasting is less effective. Some of the nowcasting techniques reported in the last years are reviewed shortly, making em
Revista Brasileira de Meteorologia. Publicado em: 2008-03
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8. Zoneamento agroclimático para a cultura do pinus no Estado do Espírito Santo
The objective of this work is to make an agroclimatic zoning for the species Pinus elliottii var. Elliottii, Pinus caribaea var. hondurensis, Pinus taeda and Pinus oocarpa for the State of Espírito Santo, identifying areas with climatic aptitude for implantation of stand of production. It was used eteorological data of the period of 1977 to 2006, from eight
Publicado em: 2008
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9. Determination of marine wind fields in the Campos basin from ENVISAT/ASAR images / Extração do campo de vento na Bacia de Campos, RJ, a partir de imagens ENVISAT/ASAR
The knowledge of ocean surface winds is very important for oceanographic and meteorological studies as well as for practical applications. Considering the great difficulty of installation, operation and maintenance of instrumentation for the in situ measurement of marine winds, it is of high interest the development of methodologies for obtaining this variab
Publicado em: 2007
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10. 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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11. 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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12. CHARACTERISTICS OF RAINFALL AND PRECIPITATION FEATURES DEFINED BY THE TROPICAL RAINFALL MEASURING MISSION OVER SOUTH AMERICA
The performance of the Tropical Rainfall Measuring Mission (TRMM) rainfall algorithms was investigated from December 1997 to November 2000 over South America and adjoining oceans. The Precipitation Radar (PR) and the TRMM Microwave Imager (TMI) algorithms are compared with the rainfall estimates of the Geostationary Environmental Satellite (GOES) Precipitati
Publicado em: 2003