Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements.
Autor(a) principal: | |
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Data de Publicação: | 1993 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/667264 http://dx.doi.org/10.1016/0168-1923(93)90003-Z |
Resumo: | A multi-layer combination equation has been used to calculate transpiration from a tropical rainforest in the central Amazon, Brazil. The five-layer formulation used through-canopy measurements of temperature and humidity deficit with leaf stomatal and boundary layer conductances scaled up to canopy layer values used a profile of canopy leaf area index derived from the literature. Net radiation input to each layer values was estimated from an above canopy measurement using an extinction function and leaf area index. Transpiration calculated for hourly and daily periods in a range of seasonal condition agreed well with those measured directly with and eddy correlation device. Four simplified forms of the transpiration calculation were also compared with the direct measurement. These simplified forms used the above-canopy or the average of the through-canopy values of weather variables and use either the average of leaf conductances multiplied by total leaf area index or the average of the layer conductances. These simplified forms of the tanspirations calculation gave poorer agreement with measured transpiration. |
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Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements.Floresta tropial umidaTranspiracaoBrasilAmazonasTropical rain forestRadiation balanceCarbon dioxide contentEnergiaDióxido de CarbonoEvapotranspiraçãoMeteorologiaRadiaçãoevapotranspirationenergymeteorologytranspirationA multi-layer combination equation has been used to calculate transpiration from a tropical rainforest in the central Amazon, Brazil. The five-layer formulation used through-canopy measurements of temperature and humidity deficit with leaf stomatal and boundary layer conductances scaled up to canopy layer values used a profile of canopy leaf area index derived from the literature. Net radiation input to each layer values was estimated from an above canopy measurement using an extinction function and leaf area index. Transpiration calculated for hourly and daily periods in a range of seasonal condition agreed well with those measured directly with and eddy correlation device. Four simplified forms of the transpiration calculation were also compared with the direct measurement. These simplified forms used the above-canopy or the average of the through-canopy values of weather variables and use either the average of leaf conductances multiplied by total leaf area index or the average of the layer conductances. These simplified forms of the tanspirations calculation gave poorer agreement with measured transpiration.Institute of Hydrology; EMBRAPA-CPAA; INPE.; OSVALDO M. R. CABRAL, CPAA.ROBERTS, J.CABRAL, O. M. R.FISCH, G.MOLION, L. C. B.MOORE, C. J.SHUTTLEWORTH, W. J.2011-04-10T11:11:11Z2011-04-10T11:11:11Z1997-01-0619932017-01-16T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleAgricultural and Forest Meteorology, v. 65, n. 3-4, p. 175-196, 1993.http://www.alice.cnptia.embrapa.br/alice/handle/doc/667264http://dx.doi.org/10.1016/0168-1923(93)90003-Zenginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T04:03:17Zoai:www.alice.cnptia.embrapa.br:doc/667264Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T04:03:17falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T04:03:17Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
title |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
spellingShingle |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. ROBERTS, J. Floresta tropial umida Transpiracao Brasil Amazonas Tropical rain forest Radiation balance Carbon dioxide content Energia Dióxido de Carbono Evapotranspiração Meteorologia Radiação evapotranspiration energy meteorology transpiration |
title_short |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
title_full |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
title_fullStr |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
title_full_unstemmed |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
title_sort |
Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements. |
author |
ROBERTS, J. |
author_facet |
ROBERTS, J. CABRAL, O. M. R. FISCH, G. MOLION, L. C. B. MOORE, C. J. SHUTTLEWORTH, W. J. |
author_role |
author |
author2 |
CABRAL, O. M. R. FISCH, G. MOLION, L. C. B. MOORE, C. J. SHUTTLEWORTH, W. J. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Institute of Hydrology; EMBRAPA-CPAA; INPE.; OSVALDO M. R. CABRAL, CPAA. |
dc.contributor.author.fl_str_mv |
ROBERTS, J. CABRAL, O. M. R. FISCH, G. MOLION, L. C. B. MOORE, C. J. SHUTTLEWORTH, W. J. |
dc.subject.por.fl_str_mv |
Floresta tropial umida Transpiracao Brasil Amazonas Tropical rain forest Radiation balance Carbon dioxide content Energia Dióxido de Carbono Evapotranspiração Meteorologia Radiação evapotranspiration energy meteorology transpiration |
topic |
Floresta tropial umida Transpiracao Brasil Amazonas Tropical rain forest Radiation balance Carbon dioxide content Energia Dióxido de Carbono Evapotranspiração Meteorologia Radiação evapotranspiration energy meteorology transpiration |
description |
A multi-layer combination equation has been used to calculate transpiration from a tropical rainforest in the central Amazon, Brazil. The five-layer formulation used through-canopy measurements of temperature and humidity deficit with leaf stomatal and boundary layer conductances scaled up to canopy layer values used a profile of canopy leaf area index derived from the literature. Net radiation input to each layer values was estimated from an above canopy measurement using an extinction function and leaf area index. Transpiration calculated for hourly and daily periods in a range of seasonal condition agreed well with those measured directly with and eddy correlation device. Four simplified forms of the transpiration calculation were also compared with the direct measurement. These simplified forms used the above-canopy or the average of the through-canopy values of weather variables and use either the average of leaf conductances multiplied by total leaf area index or the average of the layer conductances. These simplified forms of the tanspirations calculation gave poorer agreement with measured transpiration. |
publishDate |
1993 |
dc.date.none.fl_str_mv |
1993 1997-01-06 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2017-01-16T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Agricultural and Forest Meteorology, v. 65, n. 3-4, p. 175-196, 1993. http://www.alice.cnptia.embrapa.br/alice/handle/doc/667264 http://dx.doi.org/10.1016/0168-1923(93)90003-Z |
identifier_str_mv |
Agricultural and Forest Meteorology, v. 65, n. 3-4, p. 175-196, 1993. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/667264 http://dx.doi.org/10.1016/0168-1923(93)90003-Z |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503430801195008 |