Atmospheric Circulation
Mostrando 13-24 de 89 artigos, teses e dissertações.
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13. Resposta das circulações oceânica e atmosférica associada ao enfraquecimento da circulação termohalina global / Response of the oceanic and atmospheric circulations associated with the weakening of global thermohaline circulation
A Circulação Termohalina Global (CTG) consiste no transporte de massas dágua oceânicas associado a diferenças na densidade da água do mar devido a variações de temperatura e salinidade. Estudos têm demonstrado que o aumento da precipitação em altas latitudes do Hemisfério Norte e o derretimento do gelo da região do Ártico podem gerar um fluxo d
Publicado em: 2009
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14. Experimentos com o modelo regional eta em diferentes configurações durante o período salljex e mecanismos de mesoescala associados ao desenvolvimento de scm / Experiments with the regional eta model in different settings during the salljex period and mesoescale mechanisms associated with MCS development
The rainfall regime over southern Brazil, Uruguay and northern Argentina is strongly influenced by Mesoscale Convective Complexes (MCCs) that develop during night time associated with the Low Level Jet (LLJ) to the east of Andes. As they are mesoscale systems, their predictability depends on the model resolution and ability in representing the main features
Publicado em: 2008
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15. Dry spells occurrence in the northwest portion of Rio Grande do Sul state between the years 1978 and 2005 and its association to the climatic conditions in the atmosphere / Veranicos ocorridos na porção noroeste do estado do Rio Grande do Sul entre 1978 e 2005 e sua associação às condições climáticas na atmosfera
Agriculture plays an extremely important role in the economy of Rio Grande do Sul state. The target region of the present work in its northwest portion is represented by six cities: São Luiz Gonzaga, Santa Rosa, Cruz Alta, Iraí, Passo Fundo e Marcelino Ramos. It constitute a national focus of soya production and thus depend heavily on atmospheric condition
Publicado em: 2008
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16. THERMAL TREATMENTS FOR THE COLORIMETRIC STABILIZATION OF TROPICAL HARDWOOD / Aplicação de tratamentos térmicos para estabilização colorimétrica de madeiras tropicais
Three tropical wood species, Simarouba amara, Sextonia rubra and Cariniana micrantha, were submitted to four thermal treatments aiming to improve the resistance to photo degradation after 84 hours of ultraviolet irradiation. The treatments were: I - one hour at 150C; II - two hours at 150C; III - one hour at 200C; IV - two hours at 200C. The non-destructive
Publicado em: 2008
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17. Simulações de clima para o holoceno médio usando o MCGA do CPTEC, com ênfase sobre a América do Sul / Climate simulations of the mid-holocene as produced by the CPTEC atmospheric general circulation model in the south america
Este trabalho tem o objetivo de analisar o clima do Holoceno Médio (HM) para a América do Sul (AS), a partir da sinergia entre a forçante dos parâmetros orbitais e concentração de CO2, utilizando o modelo de circulação geral atmosférica (MCGA) do Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) com resolução T062 e 28 níveis na vertical
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2007
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18. 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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19. O uso de ferramentas fractais e redes complexas no estudo da variabilidade pluviomÂetrica do Nordeste do Brasil
Brazil Northeastâs climate is usually described as semi-arid, characterized by hard dry seasons intermingled by hard rainfall seasons. Some areas of Northeast present annual pluviometric measure about 400 mm in mean, while in others the annual pluviometric measure is about 2000 mm. Rain events result from interplay of several physical phenomena, most of whi
Publicado em: 2007
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20. Estudo do escoamento atmosférico no Centro de Lançamento de Alcântara (CLA) através de medidas de torre anemométrica e em túnel de vento
The atmospheric flow at the Alcantara Launching Center (CLA), which is localized near a 50 m cliff, was studied through (i) the analysis of wind data that were measured during the periods from 1995 to 1999 (base years) and from 2004 to 2005 (for validation), at six levels of a 70 m anemometric tower (TA), which is placed 200 m downwind of the cliff, near a r
Publicado em: 2007
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21. Influência do gelo marinho antártico no setor austral sudoeste do Atlântico Sul / The influence of antactic sea ice in the austral and southwest sector on the south atlantic
In this work the interaction between Antarctic sea-ice and the South Atlantic ocean (austral and southwestern sectors) is investigated. To accomplish this satellite-observed sea-ice concentration (SIC) and a coupled model from NCAR-CCSM3 (National Center for Atmospheric Research - Community Climate System Model version 3) were employed. Three 150-year simula
Publicado em: 2007
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22. Simulações de clima para o holoceno médio usando o MCGA do CPTEC, com ênfase sobre a América do Sul / Climate simulations of the mid-holocene as produced by the CPTEC atmospheric general circulation model in the south america
Este trabalho tem o objetivo de analisar o clima do Holoceno Médio (HM) para a América do Sul (AS), a partir da sinergia entre a forçante dos parâmetros orbitais e concentração de CO2, utilizando o modelo de circulação geral atmosférica (MCGA) do Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) com resolução T062 e 28 níveis na vertical
Publicado em: 2007
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23. Taxonomy of invertebrate fossils (Oligocene-Miocene) from the King George island (West Antarctica) and paleobiogeography of cenozoic Bivalvia from Antarctica / Taxonomia de invertebrados fósseis (Oligoceno-Mioceno) da ilha Rei George (Antártica ocidental) e paleobiogeografia dos Bivalvia cenozóicos da Antártica
The research presented in this dissertation comprised part of the CNPq - PROANTAR Project 550352/02-3 "Mudanças paleoclimáticas na Antártica durante o Cenozóico: o registro geológico terrestre", which studies Cenozoic deposits from King George Island in order to elucidate the environmental and climatic Cenozoic histories of this Antarctic region. Cenozo
Publicado em: 2007
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24. 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