Atmospheric Heat
Mostrando 13-24 de 75 artigos, teses e dissertações.
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13. Contribuição do aninhamento do modelo Eta no modelo de circulação geral atmosférico e acoplado oceano-atmosfera do CPTEC na previsão do clima de verão sobre a América do Sul e Atlântico Tropical / Contribution of nesting regional eta model in atmospheric and coupled ocean-atmosphere general circulation model in seasonal forecast over South America and Tropical Atlantic
This work aims to verify the advantage of nesting Eta model in global coupled ocean-atmosphere model (CGCM) in climate forecast over South America and Tropical Atlantic. Three ensembles hindcasts of ten summer (December, January and February) between 1997 and 2006. The hindcasts consist of two global models from CPTEC, one atmospheric (AGCM;T062L28) and anot
Publicado em: 2010
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14. Water and energy fluxes in cowpea and castor beans cultivated in northeast Brazil / Fluxos de Ãgua e de energia em feijÃo macassar e mamona no nordeste do Brasil
The castor beans and cowpea are crops of enormous economic and social importance for the farmers in northeast Brazil, whereas the extracted oil of seeds of castor beans is used for production of biodiesel and the cowpea is the main food for poor population. Independent of crop type, the knowledge of water amount removed from soil by vegetation is of great in
Publicado em: 2009
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15. O CAMPO TERMO-HIGROMÉTRICO INTRA-URBANO E A FORMAÇÃO DE ILHAS DE CALOR E DE FRESCOR URBANAS EM SANTA MARIA/RS / THE THERMO-HYGROMETRIC FIELD INTRA-URBAN AND FORMATION OF HEAT ISLANDS AND URBAN COOL IN SANTA MARIA/RS
Urbanization and the changes imposed by man disturb the complex natural system, modifying the elements and characteristics of climate on a local scale. Considering the influence of urbanization as derived from the fact that the local climate and responsible for the generation of an urban environment specifically, this work was to analyze the field thermo-hyg
Publicado em: 2009
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16. Impacto do efeito da quebra de ondas oceânicas na estrutura da camada limite atmosférica / Impact of effect of the break ocean waves in the atmospheric boundary layer structure
Neste trabalho foi construído um modelo numérico unidimensional de Camada Limite Planetária (CLP), com a Camada de Limite Superficial (CLS) segundo a teoria de similaridade e os coeficientes de difusividade extrapolados até o topo da CLP. Os processos físicos do arrasto das ondas e da pulverização na atmosfera foram implementados no modelo, com o intu
Publicado em: 2009
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17. Impacto do efeito da quebra de ondas oceânicas na estrutura da camada limite atmosférica / Impact of effect of the break ocean waves in the atmospheric boundary layer structure
Neste trabalho foi construído um modelo numérico unidimensional de Camada Limite Planetária (CLP), com a Camada de Limite Superficial (CLS) segundo a teoria de similaridade e os coeficientes de difusividade extrapolados até o topo da CLP. Os processos físicos do arrasto das ondas e da pulverização na atmosfera foram implementados no modelo, com o intu
Publicado em: 2009
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18. Caracterização física e dinâmica de episódios de chuvas intensas nas regiões sul e sudeste do Brasil / Physical and dynamical characteristics of heavy rainfall episodes in southern and southeastern Brazil
The heavy rainfall events occurred in Southern and Southeastern Brazil between 1960 and 2004 are investigated. It is observed positive trends in the annual frequency of these events in both regions in this period of 45 years. The trend in Southern Brazil is more significant. The atmospheric environments associated with these events also are investigated, but
Publicado em: 2009
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19. Sustainable business: the concept of governance change - application a company in the petrochemical / Sustentabilidade empresarial: o conceito da governança climática aplicação a uma empresa do ramo de petroquímica
With vital significance, the greenhouse effect gases (GEG), as carbon dioxide and methane, among others, retain sun heat in the atmosphere. This fact avoids sun radiation from dissipating, without letting the Planet being warm enough to keep right conditions for live existence of Earth. However, mankind activities are increasing concentration of these gases
Publicado em: 2009
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20. Sensibilidade do modelo WASP aos efeitos da estabilidade atmosférica no Nordeste do Brasil. / Sensitivity of the WASP model the effects of atmospheric stability in Northeast Brazil.
O crescente interesse na exploração da energia eólica requer ferramentas confiáveis para estimar os recursos eólicos em uma região. Atualmente, o WAsP (Wind Atlas Analysis and Application Program) é um dos modelos numérico computacional mais utilizado para este cálculo. No entanto, os valores dos parâmetros utilizados neste modelo são representati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2008
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21. Caracterização físico-química de materiais baseados em celulose
Switching cutout devices are electrical circuit breakers which protect electric power distribution webs against lightning discharges. Switching cutout devices main parts are the fuse links in which a fuse element, a special metallic alloy, melts due to the generated heat when struck by electric discharges. When such melting occurs, and the breaker opens, an
Publicado em: 2008
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22. Padrões de circulação anômala associados a episódios úmidos e secos no sul do Brasil / Anomalous circulation patterns associated with wet and dry events in southern Brazil
The characteristics of the atmospheric circulation associated with persistent wet and dry events in Southern Brazil during all seasons were studied from 1979 to 2002, using precipitation pentad data. The result shows that the dominant oscillations of rainfall variability have periods between 2 and 6 pentads. Superposition of different periods was also identi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/04/2007
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23. Flow boiling of water in a vertical tube at sub-atmospheric pressures
This paper describes some of the key experimental results and features obtained from a study on upward flow boiling of water in a vertical tube at sub-atmospheric pressures. The experiments were conducted at 250, 500 and 1000 mbar (abs) exit pressures. From the experimental results, several interesting features and effects were observed, namely, heat transfe
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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24. Numerical simulation of HFCVD process used for diamond growth
Hot-filament chemical vapour deposition (HFCVD) is a common method employed for diamond deposition. Typically in this method a dilute mixture of carbon containing gas such as methane in hydrogen is thermally activated at sub atmospheric pressures by a hot filament. Due to the filament-substrate proximity, large temperature variation across the substrate is p
Brazilian Journal of Physics. Publicado em: 2006-06