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Registro Completo |
Biblioteca(s): |
Embrapa Meio-Norte. |
Data corrente: |
28/07/2011 |
Data da última atualização: |
07/06/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
KEMENES, A.; FORSBERG, B. R.; MELACK, J. M. |
Afiliação: |
ALEXANDRE KEMENES, CPAMN; BRUCE R. FORSBERG, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil; JOHN M. MELACK, Bren School of Environmental Science and Management, University of California, Santa Barbara, California, USA. |
Título: |
CO2 emissions from a tropical hydroelectric reservoir (Balbina, Brazil). |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Journal of Geophysical Research, Washington, v. 116, n. G03004, p. 1-11, 2011. |
Idioma: |
Inglês |
Conteúdo: |
Hydroelectric reservoirs can release significant quantities of CO2, but very few results are available from the tropics. The objective of the present study was to estimate the emission of CO2 from the Balbina hydroelectric reservoir in the central Brazilian Amazon. Diffusive and ebullitive emissions were estimated at regular intervals, both above and below the dam, using a combination of static chambers and submerged funnels. Gas releases immediately below the dam were calculated as the difference between gas flux at the entrance and the outflow of the hydroelectric turbines. An inundation model derived from a bathymetric map and daily stage readings was used for spatial and temporal interpolation of reservoir emissions. Annual emissions of CO2, upstream and downstream of Balbina dam for 2005, were estimated as 2450 and 81 Gg C, respectively, for a total annual flux of 2531 Gg C. Upstream emissions were predominantly diffusive with only 0.02 Gg C yr-1 resulting from ebullition. On average, 51% of the downstream emission was released by degassing at the turbine outflow, and the remainder was lost by diffusion from the downstream river. The total annual greenhouse gas emission from Balbina dam, including the CO2 equivalent of previously estimated CH4 emissions, was 3 Tg C yr-1, equivalent to approximately 50% of the CO2 emissions derived from the burning of fossil fuels in the Brazilian metropolis of São Paulo. |
Palavras-Chave: |
CO2; Emissão de gás carbônico. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/38854/1/CO2emissions.pdf
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Marc: |
LEADER 01931naa a2200169 a 4500 001 1896953 005 2022-06-07 008 2011 bl uuuu u00u1 u #d 100 1 $aKEMENES, A. 245 $aCO2 emissions from a tropical hydroelectric reservoir (Balbina, Brazil). 260 $c2011 520 $aHydroelectric reservoirs can release significant quantities of CO2, but very few results are available from the tropics. The objective of the present study was to estimate the emission of CO2 from the Balbina hydroelectric reservoir in the central Brazilian Amazon. Diffusive and ebullitive emissions were estimated at regular intervals, both above and below the dam, using a combination of static chambers and submerged funnels. Gas releases immediately below the dam were calculated as the difference between gas flux at the entrance and the outflow of the hydroelectric turbines. An inundation model derived from a bathymetric map and daily stage readings was used for spatial and temporal interpolation of reservoir emissions. Annual emissions of CO2, upstream and downstream of Balbina dam for 2005, were estimated as 2450 and 81 Gg C, respectively, for a total annual flux of 2531 Gg C. Upstream emissions were predominantly diffusive with only 0.02 Gg C yr-1 resulting from ebullition. On average, 51% of the downstream emission was released by degassing at the turbine outflow, and the remainder was lost by diffusion from the downstream river. The total annual greenhouse gas emission from Balbina dam, including the CO2 equivalent of previously estimated CH4 emissions, was 3 Tg C yr-1, equivalent to approximately 50% of the CO2 emissions derived from the burning of fossil fuels in the Brazilian metropolis of São Paulo. 653 $aCO2 653 $aEmissão de gás carbônico 700 1 $aFORSBERG, B. R. 700 1 $aMELACK, J. M. 773 $tJournal of Geophysical Research, Washington$gv. 116, n. G03004, p. 1-11, 2011.
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Embrapa Meio-Norte (CPAMN) |
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Registro Completo
Biblioteca(s): |
Embrapa Algodão; Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
17/04/2006 |
Data da última atualização: |
20/04/2006 |
Autoria: |
ANDOW, D. A.; BARROSO, P. A. V.; FONTES, E. M. G.; GROSSI-DE-SÁ, M. F.; HILBECK, A.; FITT, G. P. |
Título: |
Improving the scientific basis for environmental risk assessment through the case study of Bt cotton in Brazil. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
In: HILBECK, A.; ANDOW, D. A.; FONTES, E. M. G.; KAPUSCINSKI, A. R.; SCHEI, P. J. (Ed.). Environmental risk assessment of genetically modified organisms: methodologies for assessing Bt cotton in Brazil. Wallingford, UK: CABI Publishing, 2006. |
Volume: |
v. 2. |
Páginas: |
p.1-20. |
Série: |
(Environmental risk assessment of genetically modified organisms series, v. 2). |
ISBN: |
1-84593-000-2 |
Idioma: |
Inglês |
Conteúdo: |
Capítulo 1: Introduction; The Bt cotton case study for Brazil; Relation to the Kenya case study.Transgenesis and Bt cotton: worldwide use of Bt cotton; Transgenesis in cotton; Cotton breeding in Brazil. Scope of the case study: Staging methodologies for environmental risk assessment; Development of non-target biodiversity assessment; Developing methodologies to support risk assessment. References. |
Palavras-Chave: |
Algodão Bt; Risco ambiental. |
Thesagro: |
Biodiversidade; Planta Transgênica. |
Categoria do assunto: |
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Marc: |
LEADER 01427naa a2200265 a 4500 001 1187131 005 2006-04-20 008 2006 bl uuuu u00u1 u #d 020 $a1-84593-000-2 100 1 $aANDOW, D. A. 245 $aImproving the scientific basis for environmental risk assessment through the case study of Bt cotton in Brazil. 260 $c2006 300 $ap.1-20. v. 2. 490 $a(Environmental risk assessment of genetically modified organisms series, v. 2).$vv. 2. 520 $aCapítulo 1: Introduction; The Bt cotton case study for Brazil; Relation to the Kenya case study.Transgenesis and Bt cotton: worldwide use of Bt cotton; Transgenesis in cotton; Cotton breeding in Brazil. Scope of the case study: Staging methodologies for environmental risk assessment; Development of non-target biodiversity assessment; Developing methodologies to support risk assessment. References. 650 $aBiodiversidade 650 $aPlanta Transgênica 653 $aAlgodão Bt 653 $aRisco ambiental 700 1 $aBARROSO, P. A. V. 700 1 $aFONTES, E. M. G. 700 1 $aGROSSI-DE-SÁ, M. F. 700 1 $aHILBECK, A. 700 1 $aFITT, G. P. 773 $tIn: HILBECK, A.; ANDOW, D. A.; FONTES, E. M. G.; KAPUSCINSKI, A. R.; SCHEI, P. J. (Ed.). Environmental risk assessment of genetically modified organisms: methodologies for assessing Bt cotton in Brazil. Wallingford, UK: CABI Publishing, 2006.
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