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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
20/12/2017 |
Data da última atualização: |
22/12/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
KUNERT, N.; APARECIDO, L. M. T.; WOLFF, S.; HIGUCHI, N.; SANTOS, J. dos; ARAUJO, A. C. de; TRUMBORE, S. |
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. |
Título: |
A revised hydrological model for the Central Amazon: The importanceof emergent canopy trees in the forest water budget. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 239, p. 47-57, May 2017. |
DOI: |
https://doi-org.ez103.periodicos.capes.gov.br/10.1016/j.agrformet.2017.03.002 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Terra firme; Trópicos. |
Thesagro: |
Água; Árvore; Evapotranspiração; Floresta. |
Thesaurus Nal: |
Amazonia. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 02510naa a2200289 a 4500 001 2083071 005 2021-12-22 008 2017 bl uuuu u00u1 u #d 024 7 $ahttps://doi-org.ez103.periodicos.capes.gov.br/10.1016/j.agrformet.2017.03.002$2DOI 100 1 $aKUNERT, N. 245 $aA revised hydrological model for the Central Amazon$bThe importanceof emergent canopy trees in the forest water budget.$h[electronic resource] 260 $c2017 520 $aThe 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. 650 $aAmazonia 650 $aÁgua 650 $aÁrvore 650 $aEvapotranspiração 650 $aFloresta 653 $aTerra firme 653 $aTrópicos 700 1 $aAPARECIDO, L. M. T. 700 1 $aWOLFF, S. 700 1 $aHIGUCHI, N. 700 1 $aSANTOS, J. dos 700 1 $aARAUJO, A. C. de 700 1 $aTRUMBORE, S. 773 $tAgricultural and Forest Meteorology$gv. 239, p. 47-57, May 2017.
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Embrapa Amazônia Oriental (CPATU) |
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Registros recuperados : 10 | |
3. |  | ANDRADE, A. C. S. de; LOUREIRO, M. B.; SOUZA, A. D. de O.; RAMOS, F. N. Quebra de dormência de sementes de sucupira-preta. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 32, n. 5, p. 465-469, maio 1997. Título em inglês: Dormancy break in bowdichia virgilioides seeds.Biblioteca(s): Embrapa Unidades Centrais. |
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6. |  | CARVALHO, L. de A.; ZOCCAL, R.; SOUZA, A. D. de; GOMES, A. T.; LEITE, J. L. B. Agricultura familiar e produção de leite na Zona da Mata de Minas Gerais. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 41., 2004, Campo Grande, MS. Produção animal e a segurança alimentar: anais. Viçosa, MG: Sociedade Brasileira de Zootecnia, 2004.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Leite. |
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7. |  | MARTINS, C. E.; CÓSER, A. C.; LEMOS, A. de M.; SOUZA, A. D. de; FRANCO, P. R. V. (ed.). Aspectos técnicos, econômicos, sociais e ambientais da atividade leiteira. Juiz de Fora: Embrapa Gado de Leite, 2005. 172 p. Trabalhos apresentados ao 7 Minas Leite, 2005, Juiz de Fora.Biblioteca(s): Embrapa Gado de Leite. |
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8. |  | SANTOS, J. C. dos; SOUZA, A. D. de; CASTRO, A. A. de; KAGEYAMA, P. Y.; BRAGA, R. R.; MENEZES, R. S. de; COSTA, J. S. R. da. Demandas tecnológicas para o sistema produtivo de borracha extrativa (Hevea spp.) no estado do Acre. Rio Branco, AC: Embrapa Acre, 2001. 18 p. (Embrapa Acre. Documentos, 71). Trabalho resultante do projeto Plataforma Tecnológica para o Setor Extrativista do Estado do Acre.Biblioteca(s): Embrapa Acre. |
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9. |  | MARTINS, C. E.; CÓSER, A. C.; SOUZA, A. D. de; FRANCO, P. R. V.; MAGALHÃES, F. A. R.; LEMOS, A. de M.; BERNARDO, W. F. (ed.). Tecnologias alternativas para a produção de leite e derivados em bases sustentáveis. Juiz de Fora: Embrapa Gado de Leite, 2004. 142 p. Trabalhos apresentados ao 6 Minas Leite, 2004, Juiz de Fora.Biblioteca(s): Embrapa Gado de Leite. |
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10. |  | NUNES, G. H. do S.; C. FILHO, J. H. da; DANTAS, M. S. M.; PAULA, V. F. S. de; SOUZA, A. D. de; TORRES FILHO, J.; SILVA, J. R. da; ARAGÃO, F. A. de S. Divergência genética entre linhagens de melão pele de sapo. Horticultura Brasileira, Brasília, DF, v. 25, n. 1, ago. 2007. s 92. Suplemento. Trabalho apresentado no 47. Congresso Brasileiro de Olericultura, 4. Simpósio Brasileiro sobre Cucurbitáceas, 2007. Porto Seguro. Resumo 498.Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
Biblioteca(s): Embrapa Hortaliças. |
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