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| Registros recuperados : 111 | |
| 6. |  | BARROS, J. P. A. de; SOUZA, L. S. B. de; MOURA, M. S. B. de. Influência das variáveis meteorológicas na temperatura da superfície da Caatinga em Petrolina, PE. In: CONGRESSO INTERNACIONAL DA REALIDADE SEMIÁRIDA, 2.; SIMPÓSIO ALAGOANO SOBRE ECOSSISTEMAS DO SEMIÁRIDO, 3., 2014, Delmiro Gouveia. Anais... Delmiro Gouveia: UFLA, Campus do Sertão, 2014. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 13. | | SOUZA, L. S. B. de; SAMPAIO, A. A.; MARTINS, L. M. V.; GAVA, C. A. T.; FERNANDES JUNIOR, P. I. Atividade amilolítica de rizóbios de feijão-caupi sobre diferentes fontes de amido. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMIÁRIDO, 7.; JORNADA DE INICIAÇÃO CIENTÍFICA DA FACEPE/UNIVASF, 1., 2012, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2012. p. 73-79. 1 CD-ROM. (Embrapa Semiárido. Documentos, 248).| Biblioteca(s): Embrapa Semiárido. |
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| 14. | | OLIVEIRA, L. D. da S.; SOUZA, L. S. B. de; MOURA, M. S. B. de; RODRIGUES, G. D. da S. Efeito do aumento da temperatura na classificação climática do município de Nossa Senhora da Glória, SE. In: CONGRESSO INTERNACIONAL DA REALIDADE SEMIÁRIDA, 2.; SIMPÓSIO ALAGOANO SOBRE ECOSSISTEMAS DO SEMIÁRIDO, 3., 2014, Delmiro Gouveia. Anais... Delmiro Gouveia: UFLA, Campus do Sertão, 2014. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 111 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
05/09/2017 |
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Data da última atualização: |
27/02/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
C - 0 |
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Autoria: |
SOUZA, L. S. B. de; MOURA, M. S. B. de; SEDIYAMA, G. C.; SILVA, T. G. F. da. |
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Afiliação: |
LUCIANA SANDRA BASTOS DE SOUZA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE; MAGNA SOELMA BESERRA DE MOURA, CPATSA; GILBERTO CHOHAKU SEDIYAMA, UFV; THIERES GEORGE FREIRE DA SILVA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE. |
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Título: |
Carbon exchange in a Caatinga area during an unusually drought year. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Agrometeoros, Passo Fundo, v. 25, n. 1, p. 37-45, ago. 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere. |
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Palavras-Chave: |
Dry forest; Semiárido; Turbulent vortices covariance. |
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Thesagro: |
Dióxido de carbono; Floresta; Resistência a Seca; Seca. |
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Thesaurus NAL: |
Carbon dioxide. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163425/1/Magna-1.pdf
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Marc: |
LEADER 01803naa a2200253 a 4500
001 2075024
005 2018-02-27
008 2017 bl uuuu u00u1 u #d
100 1 $aSOUZA, L. S. B. de
245 $aCarbon exchange in a Caatinga area during an unusually drought year.$h[electronic resource]
260 $c2017
520 $aThe objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere.
650 $aCarbon dioxide
650 $aDióxido de carbono
650 $aFloresta
650 $aResistência a Seca
650 $aSeca
653 $aDry forest
653 $aSemiárido
653 $aTurbulent vortices covariance
700 1 $aMOURA, M. S. B. de
700 1 $aSEDIYAMA, G. C.
700 1 $aSILVA, T. G. F. da
773 $tAgrometeoros, Passo Fundo$gv. 25, n. 1, p. 37-45, ago. 2017.
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Embrapa Semiárido (CPATSA) |
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