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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
20/12/2017 |
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Data da última atualização: |
22/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
KUNERT, N.; APARECIDO, L. M. T.; WOLFF, S.; HIGUCHI, N.; SANTOS, J. dos; ARAUJO, A. C. de; TRUMBORE, S. |
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Afiliação: |
Norbert Kunert, Max-Planck-Institute for Biogeochemistry / INPA; Luiza Maria T. Aparecido, INPA / Texas A&M University; Stefan Wolff, Max-Planck Institute for Chemistry; Niro Higuchi, INPA; Joaquim dos Santos, INPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU; Susan Trumbore, Max-Planck-Institute for Biogeochemistry. |
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Título: |
A revised hydrological model for the Central Amazon: The importanceof emergent canopy trees in the forest water budget. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 239, p. 47-57, May 2017. |
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DOI: |
https://doi-org.ez103.periodicos.capes.gov.br/10.1016/j.agrformet.2017.03.002 |
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Idioma: |
Inglês |
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Conteúdo: |
The Amazon forest is integral to the global climate system in part because of the high rate of rainfallrecycling through tree transpiration and biodiversity (size and species composition). However, the par-titioning of precipitation into evaporation, transpiration and runoff, has been quantified at only a fewsites. At our study site in the central Amazon, annual rainfall in 2013 was 2302 mm and latent heat fluxmeasurements made using eddy covariance revealed that 1360 mm (59%) was returned to the atmo-sphere through evaporation and transpiration. Runoff accounted for 41% of the net ecosystem waterloss. Combining annual xylem sap flux estimates with total stand sap wood area, we estimated annualstand transpiration rate to be 851 mm (36% of annual rainfall). Emergent canopy trees (diameter >30 cm;average height of 28 m) were responsible for the majority (71%) of the transpired water flux, recyclingpotentially 26% of the rainfall back to the atmosphere. By difference, we estimate that 510 mm of inter-cepted rainwater (22% of rainfall) was evaporated directly back to atmosphere from the canopy. Higheststand transpiration rates occurred during the dryer months due to both increased water vapor pressuredeficit and the onset of new leaf flush. This study provides further evidence for convergent water usecharacteristics of tropical trees and highlights the importance of large trees in tropical moist forests. Largetrees have been demonstrated to be vulnerable to drought-related mortality, and thus potentially willmake up a critical component of the response of tropical forests to climate change. MenosThe Amazon forest is integral to the global climate system in part because of the high rate of rainfallrecycling through tree transpiration and biodiversity (size and species composition). However, the par-titioning of precipitation into evaporation, transpiration and runoff, has been quantified at only a fewsites. At our study site in the central Amazon, annual rainfall in 2013 was 2302 mm and latent heat fluxmeasurements made using eddy covariance revealed that 1360 mm (59%) was returned to the atmo-sphere through evaporation and transpiration. Runoff accounted for 41% of the net ecosystem waterloss. Combining annual xylem sap flux estimates with total stand sap wood area, we estimated annualstand transpiration rate to be 851 mm (36% of annual rainfall). Emergent canopy trees (diameter >30 cm;average height of 28 m) were responsible for the majority (71%) of the transpired water flux, recyclingpotentially 26% of the rainfall back to the atmosphere. By difference, we estimate that 510 mm of inter-cepted rainwater (22% of rainfall) was evaporated directly back to atmosphere from the canopy. Higheststand transpiration rates occurred during the dryer months due to both increased water vapor pressuredeficit and the onset of new leaf flush. This study provides further evidence for convergent water usecharacteristics of tropical trees and highlights the importance of large trees in tropical moist forests. Largetrees have been demonstrated to be vulnerable to drought-related morta... Mostrar Tudo |
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Palavras-Chave: |
Terra firme; Trópicos. |
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Thesagro: |
Água; Árvore; Evapotranspiração; Floresta. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
null
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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: |
19/08/2002 |
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Data da última atualização: |
07/06/2018 |
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Tipo da produção científica: |
Circular Técnica |
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Autoria: |
PEREIRA FILHO, I. A.; CRUZ, J. C. |
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Afiliação: |
ISRAEL ALEXANDRE PEREIRA FILHO, CNPMS; JOSE CARLOS CRUZ, CNPMS. |
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Título: |
Cultivares de milho para o consumo verde. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Sete Lagoas: Embrapa Milho e Sorgo, 2002. |
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Páginas: |
7 p. |
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Série: |
(Embrapa Milho e Sorgo. Circular técnica, 15). |
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Idioma: |
Português |
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Palavras-Chave: |
Cultivar. |
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Thesagro: |
Comercialização; Milho Verde; Variedade; Zea Mays. |
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Categoria do assunto: |
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F Plantas e Produtos de Origem Vegetal |
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URL: |
https://www.infoteca.cnptia.embrapa.br/infoteca/bitstream/doc/485443/1/Circ15.pdf
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Marc: |
null
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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