Wet canopy evaporation from a Puerto Rican lower montane rain forest: The importance of realistically estimated aerodynamic conductance
Por:
Holwerda F., Bruijnzeel L.A., Scatena F.N., Vugts H.F., Meesters, AGCA
Publicada:
11 ene 2012
Categoría:
Water Science and Technology
Resumen:
Rainfall interception (I) was measured in 20 m tall Puerto Rican tropical forest with complex topography for a 1-year period using totalizing throughfall (TF) and stemflow (SF) gauges that were measured every 2-3 days. Measured values were then compared to evaporation under saturated canopy conditions (E) determined with the Penman-Monteith (P-M) equation, using (i) measured (eddy covariance) and (ii) calculated (as a function of forest height and wind speed) values for the aerodynamic conductance to momentum flux (g(a,M)). E was also derived using the energy balance equation and the sensible heat flux measured by a sonic anemometer (11). I per sampling occasion was strongly correlated with rainfall (P): I = 0.21P + 0.60 (mm), r(2) = 0.82, n = 121. Values for canopy storage capacity (S = 0.37 mm) and the average relative evaporation rate (E/R = 0.20) were derived from data for single events (n = 51). Application of the Gash analytical interception model to 70 multiple-storm sampling ev
Filiaciones:
Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, Mexico
Department of Hydrology and Geo-Environmental Sciences, Faculty of Earth and Life Sciences, VU University, Amsterdam, Netherlands
Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA, United States
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