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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
15/06/1998 |
Data da última atualização: |
19/07/2023 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
SOARES, J. M.; NASCIMENTO, T.; CORDEIRO, G. G. |
Afiliação: |
JOSE MONTEIRO SOARES, CPATSA; TARCIZIO NASCIMENTO, CPATSA; GILBERTO GOMES CORDEIRO, CPATSA. |
Título: |
Monitoramento do manejo de agua na cultura da mangueira ao nivel de campo sob irrigacao por sulcos, utilizando tubos janelados fixos. |
Ano de publicação: |
1994 |
Fonte/Imprenta: |
In: EMBRAPA. Centro de Pesquisa Agropecuaria do Tropico Semi-Arido. Rede de cooperação técnica entre a EMBRAPA-CPATSA/Fazenda Frutivale: relatório técnico de atividades de pesquisas desenvolvidas nas culturas da videira e da mangueira. Petrolina, 1994. |
Páginas: |
p. 70-93. |
Idioma: |
Português |
Conteúdo: |
Descricao do sistema de irrigacao, monitoramento da umidade do solo, distribuicao horizontal e vertical do sistema radicular da mangueira, semi-distancia entre plantas. |
Palavras-Chave: |
Furrow irrigaton; Gated pipe; Management; Tubo janelado fixo. |
Thesagro: |
Água; Irrigação; Irrigação por Sulco; Manejo; Manga. |
Thesaurus NAL: |
Irrigation; mangoes; water. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/196704/1/Monitoramento-do-manejo-de-Agua-na-Cultura-da-Mangueira-ao-Nivel-de-Campo-Sob-Irrigacao-por-Sulcos-Ultilizando-Tubos-janelados-Fixos.pdf
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Marc: |
LEADER 01199naa a2200301 a 4500 001 1133442 005 2023-07-19 008 1994 bl uuuu u00u1 u #d 100 1 $aSOARES, J. M. 245 $aMonitoramento do manejo de agua na cultura da mangueira ao nivel de campo sob irrigacao por sulcos, utilizando tubos janelados fixos. 260 $c1994 300 $ap. 70-93. 520 $aDescricao do sistema de irrigacao, monitoramento da umidade do solo, distribuicao horizontal e vertical do sistema radicular da mangueira, semi-distancia entre plantas. 650 $aIrrigation 650 $amangoes 650 $awater 650 $aÁgua 650 $aIrrigação 650 $aIrrigação por Sulco 650 $aManejo 650 $aManga 653 $aFurrow irrigaton 653 $aGated pipe 653 $aManagement 653 $aTubo janelado fixo 700 1 $aNASCIMENTO, T. 700 1 $aCORDEIRO, G. G. 773 $tIn: EMBRAPA. Centro de Pesquisa Agropecuaria do Tropico Semi-Arido. Rede de cooperação técnica entre a EMBRAPA-CPATSA/Fazenda Frutivale: relatório técnico de atividades de pesquisas desenvolvidas nas culturas da videira e da mangueira. Petrolina, 1994.
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