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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
18/05/2018 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLVEIRA, P. E. S.; ACEVEDO, O. C.; SÖRGEL, M.; TSOKANKUNKU, A.; WOLFF, S.; ARAUJO, A. C. de; SOUZA, R. A. F.; SÁ, M. O.; MANZI, A. O.; ANDREAE, M. O. |
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Afiliação: |
Pablo E. S. Oliveira, UFSM; Otávio C. Acevedo, UFSM; Matthias Sörgel, Max Planck Institute for Chemistry; Anywhere Tsokankunku, Max Planck Institute for Chemistry; Stefan Wolff, Max Planck Institute for Chemistry; ALESSANDRO CARIOCA DE ARAUJO, CPATU; Rodrigo A. F. Souza, UEA; Marta O. Sá, INPA; Antônio O. Manzi, INPA; Meinrat O. Andreae, Max Planck Institute for Chemistry. |
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Título: |
Nighttime wind and scalar variability within and above an Amazonian canopy. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Atmospheric Chemistry and Physics, v. 18, n. 5, p. 3083-3099, 2018. |
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DOI: |
10.5194/acp-18-3083-2018 |
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Idioma: |
Inglês |
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Conteúdo: |
Nocturnal turbulent kinetic energy (TKE) and fluxes of energy, CO2 and O3 between the Amazon forest and the atmosphere are evaluated for a 20-day campaign at the Amazon Tall Tower Observatory (ATTO) site. The distinction of these quantities between fully turbulent (weakly stable) and intermittent (very stable) nights is discussed. Spectral analysis indicates that low-frequency, nonturbulent fluctuations are responsible for a large portion of the variability observed on intermittent nights. In these conditions, the low-frequency exchange may dominate over the turbulent transfer. In particular, we show that within the canopy most of the exchange of CO2 and H2O happens on temporal scales longer than 100 s. At 80 m, on the other hand, the turbulent fluxes are almost absent in such very stable conditions, suggesting a boundary layer shallower than 80 m. The relationship between TKE and mean winds shows that the stable boundary layer switches from the very stable to the weakly stable regime during intermittent bursts of turbulence. In general, fluxes estimated with long temporal windows that account for low-frequency effects are more dependent on the stability over a deeper layer above the forest than they are on the stability between the top of the canopy and its interior, suggesting that low-frequency processes are controlled over a deeper layer above the forest. |
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Palavras-Chave: |
Energia cinética turbulenta; TKE. |
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Thesagro: |
Dióxido de Carbono; Vento. |
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Thesaurus Nal: |
Amazonia. |
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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/177153/1/Oliveira-ACP-2018.pdf
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Marc: |
LEADER 02255naa a2200301 a 4500
001 2091667
005 2022-05-20
008 2018 bl uuuu u00u1 u #d
024 7 $a10.5194/acp-18-3083-2018$2DOI
100 1 $aOLVEIRA, P. E. S.
245 $aNighttime wind and scalar variability within and above an Amazonian canopy.$h[electronic resource]
260 $c2018
520 $aNocturnal turbulent kinetic energy (TKE) and fluxes of energy, CO2 and O3 between the Amazon forest and the atmosphere are evaluated for a 20-day campaign at the Amazon Tall Tower Observatory (ATTO) site. The distinction of these quantities between fully turbulent (weakly stable) and intermittent (very stable) nights is discussed. Spectral analysis indicates that low-frequency, nonturbulent fluctuations are responsible for a large portion of the variability observed on intermittent nights. In these conditions, the low-frequency exchange may dominate over the turbulent transfer. In particular, we show that within the canopy most of the exchange of CO2 and H2O happens on temporal scales longer than 100 s. At 80 m, on the other hand, the turbulent fluxes are almost absent in such very stable conditions, suggesting a boundary layer shallower than 80 m. The relationship between TKE and mean winds shows that the stable boundary layer switches from the very stable to the weakly stable regime during intermittent bursts of turbulence. In general, fluxes estimated with long temporal windows that account for low-frequency effects are more dependent on the stability over a deeper layer above the forest than they are on the stability between the top of the canopy and its interior, suggesting that low-frequency processes are controlled over a deeper layer above the forest.
650 $aAmazonia
650 $aDióxido de Carbono
650 $aVento
653 $aEnergia cinética turbulenta
653 $aTKE
700 1 $aACEVEDO, O. C.
700 1 $aSÖRGEL, M.
700 1 $aTSOKANKUNKU, A.
700 1 $aWOLFF, S.
700 1 $aARAUJO, A. C. de
700 1 $aSOUZA, R. A. F.
700 1 $aSÁ, M. O.
700 1 $aMANZI, A. O.
700 1 $aANDREAE, M. O.
773 $tAtmospheric Chemistry and Physics$gv. 18, n. 5, p. 3083-3099, 2018.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
23/06/2000 |
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Data da última atualização: |
09/06/2018 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
MONTEIRO. J. de A. |
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Afiliação: |
EMBRAPA-CNPMS. |
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Título: |
A economia da produção de milho e o meio ambiente. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE MILHO E SORGO, 23., 2000, Uberlândia. A inovação tecnológica e a competividade no contexto dos mercados globalizados: resumos. Sete Lagoas: ABMS: Embrapa Milho e Sorgo; Uberlândia: Universidade Federal de Uberlândia, 2000. p. 345. |
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Idioma: |
Português |
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Palavras-Chave: |
Maize; Production economy; Production system; Zona macroagroecologica. |
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Thesagro: |
Economia da Produção; Meio Ambiente; Milho; Sistema de Produção; Zea Mays. |
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Thesaurus NAL: |
environment. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/41779/1/Economia-producao.pdf
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Marc: |
LEADER 00847nam a2200217 a 4500
001 1483911
005 2018-06-09
008 2000 bl uuuu u00u1 u #d
100 1 $aMONTEIRO. J. de A.
245 $aA economia da produção de milho e o meio ambiente.$h[electronic resource]
260 $aIn: CONGRESSO NACIONAL DE MILHO E SORGO, 23., 2000, Uberlândia. A inovação tecnológica e a competividade no contexto dos mercados globalizados: resumos. Sete Lagoas: ABMS: Embrapa Milho e Sorgo; Uberlândia: Universidade Federal de Uberlândia, 2000. p. 345.$c2000
650 $aenvironment
650 $aEconomia da Produção
650 $aMeio Ambiente
650 $aMilho
650 $aSistema de Produção
650 $aZea Mays
653 $aMaize
653 $aProduction economy
653 $aProduction system
653 $aZona macroagroecologica
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Embrapa Milho e Sorgo (CNPMS) |
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