Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/1953
Título: Surface conductance of Amazonian pasture: model application and calibration for canopy climate
Autor(es): I. R. WRIGHT
Antonio Ocimar Manzi
H. R. ROCHA
Assunto: Condutancia de Superficie
Modelo de Transferencia Solo-Planta-Atmosfera
Resistencia Estomatica
ISSN: 0168-1923
Revista: Agricultural and Forest Meteorology
Volume: 75
Resumo: Bulk stomatal conductances of Amazonian pasture, derived from micrometeorological measurements, are used to calibrate existing climate-based models of stomatal response. In the models, specific humidity deficit and solar radiation are the dominant controls on transpiration, with soil moisture providing the necessary seasonality. This paper relates hourly conductances to canopy-space climate to achieve parameters which are substantially independent of the aerodynamic characteristics of the measurement site, and a method is described for implementing this scheme within resistance-based models of surface fluxes for use in general circulation models. The results are compared with those from simpler methods using unmodified climate data measured at 3.5 m above the pasture. Although additional uncertainty is introduced by the estimation of canopy climate, reasonable accuracy is achieved in predicting evaporation at this site. It is demonstrated that errors may be introduced if the difference between measurement height for calibration and reference height for application is ignored.
URI: http://repositorio.inpa.gov.br/handle/123/1953
ISSN: 0168-1923
DOI: https://dx.doi.org/10.1016/0168-1923(94)02203-V
Aparece nas coleções:Coordenação de Dinâmica Ambiental (CDAM)

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