Atmospheric Greenhouse Effect
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Estudo das concentrações dos clorofluorcabonetos CFC-11 e CFC-12 na baixa atmosfera em regiões remotas, rurais e urbanas no Brasil. / Study of the chlorofluorocarbons 11 and 12 in the lower atmosphere in remote, rural and urban areas in Brazil.
ABSTRACT Chlorofluorocarbons (CFCs) were intensively used for refrigeration, production of aerosols and foams. Presently, their production and trade are controlled, because of their role in ozone depletion. This work presents a study of atmospheric chlorofluorocarbons CCl3F (CFC-11) and CCl2F2 (CFC-12) in the lower troposphere of remote regions in Brazil (Ba
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200302
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14. Estudo das concentrações dos clorofluorcabonetos CFC-11 e CFC-12 na baixa atmosfera em regiões remotas, rurais e urbanas no Brasil. / Study of the chlorofluorocarbons 11 and 12 in the lower atmosphere in remote, rural and urban areas in Brazil.
ABSTRACT Chlorofluorocarbons (CFCs) were intensively used for refrigeration, production of aerosols and foams. Presently, their production and trade are controlled, because of their role in ozone depletion. This work presents a study of atmospheric chlorofluorocarbons CCl3F (CFC-11) and CCl2F2 (CFC-12) in the lower troposphere of remote regions in Brazil (Ba
Publicado em: 2003
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15. Carbon sequestration potenciality of sugarcane harvesting without burning. / Potencialidade do sistema de colheita sem queima da cana-de-açúcar para o sequëstro de carbono.
The present work was led in experimental areas installed by COPERSUCAR, in clay soil - Hapludox (Usina São Martinho) and sandy soil - Quartzipsamment (Usina da Pedra) in the area of Ribeirão Preto (SP). The objective was to analyze the influence of the deposited trash on the soil surface in relation to the dynamics of carbon in the sugarcane agrosystem sin
Publicado em: 2003
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16. Aquecimento global e o mercado de carbono: uma aplicação do modelo CERT. / Global warming and the carbon market: an application of the cert model.
As ações decorrentes das atividades econômicas e industriais têm provocado alterações na biosfera, resultando na quase duplicação da concentração de Gases de Efeito Estufa (GEE) na atmosfera durante o período de 1750 a 1998. A alteração da concentração dos GEE poderá desencadear um aumento da temperatura média no planeta entre 1,4 e 5,8°C n
Publicado em: 2003
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17. Parametrização dos processos radiativos em modelo climático simples / Parameterization of radiative processes in simple climate models.
Modelos de transferência radiativa solar e termal, baseados em parametrizações dos processos de transferência radiativa sofisticados e eficientes computacionalmente, foram implementados em um modelo atmosférico estatístico dinâmico com vegetação acoplada (MED), objetivando simular o clima médio zonal anual e os possíveis impactos climáticos prove
Publicado em: 2002
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18. Inventario de emissões de dioxido de carbono devido ao uso de energia : a região de Campinas e seu setor sucro-alcooleiro
The environment and its conservation have been the focus of public and scientific attention since the last decade. The greenhouse effect, its causes and consequences are topics of current interest. The attempt to determine the human contribution to this effect demands the accounting of greenhouse gas emissions, mainly CO2, the atmospheric concentration of wh
Publicado em: 1999
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19. Greenhouse gas growth rates
We posit that feasible reversal of the growth of atmospheric CH4 and other trace gases would provide a vital contribution toward averting dangerous anthropogenic interference with global climate. Such trace gas reductions may allow stabilization of atmospheric CO2 at an achievable level of anthropogenic CO2 emissions, even if the added global warming constit
National Academy of Sciences.
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20. Tree rings, carbon dioxide, and climatic change
Tree rings have been used in various applications to reconstruct past climates as well as to assess the effects of recent climatic and environmental change on tree growth. In this paper we briefly review two ways that tree rings provide information about climate change and CO2: (i) in determining whether recent warming during the period of instrumental
The National Academy of Sciences of the USA.
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21. Sulfur pollution suppression of the wetland methane source in the 20th and 21st centuries
Natural wetlands form the largest source of methane (CH4) to the atmosphere. Emission of this powerful greenhouse gas from wetlands is known to depend on climate, with increasing temperature and rainfall both expected to increase methane emissions. This study, combining our field and controlled environment manipulation studies in Europe and North America, re
National Academy of Sciences.