Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/667264
Research center of Embrapa/Collection: Embrapa Amazônia Ocidental - Artigo em periódico indexado (ALICE)
Date Issued: 1993
Type of Material: Artigo em periódico indexado (ALICE)
Authors: ROBERTS, J.
CABRAL, O. M. R.
FISCH, G.
MOLION, L. C. B.
MOORE, C. J.
SHUTTLEWORTH, W. J.
Additional Information: Institute of Hydrology; EMBRAPA-CPAA; INPE.; OSVALDO M. R. CABRAL, CPAA.
Title: Transpiration from an Amazonian rainforest calculated from stomatal conductance measurements.
Publisher: Agricultural and Forest Meteorology, v. 65, n. 3-4, p. 175-196, 1993.
Language: en
Keywords: Floresta tropial umida
Transpiracao
Brasil
Amazonas
Tropical rain forest
Radiation balance
Carbon dioxide content.
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.
Thesagro: Dióxido de Carbono
Energia
Evapotranspiração
Meteorologia
Radiação.
NAL Thesaurus: evapotranspiration
energy
meteorology
transpiration.
Data Created: 1997-01-06
Appears in Collections:Artigo em periódico indexado (CPAA)

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