@InProceedings{SáPach:2004:GeMeWi,
               author = "S{\'a}, Leonardo Deane de Abreu and Pacheco, Vanusa Bezerra",
          affiliation = "Instituto Nacional de Pesquisas Espaciais, Centro de Previs{\~a}o 
                         do Tempo e Estudos Clim{\'a}ticos (INPE.CPTEC)",
                title = "A general mean wind velocity profile relationship for an Amazonian 
                         rain forest environment",
            booktitle = "Anais...",
                 year = "2004",
         organization = "Conferencia Cientifica do LBA, 3.",
             abstract = "We studyed mean wind velocity profiles measured on a 60m height 
                         tower built in the forest reserve Jar{\'u} (10005'S, 61035'W), 
                         belonging to IBAMA institution, located in the brazilian 
                         north-western state of Rondonia. The data were collected during 
                         LBA (Large Scale Biosphere-Atmosphere Experiment in Amazonia) wet 
                         season campaign. The nine cup anemometers whose measurements were 
                         used in this work were vertically placed in a way to provide good 
                         calculation of the mean velocity wind profile inflexion point 
                         value. This allow us to obtain well fitted third degree polinomial 
                         functions for the vertical wind profiles. Thus, it was possible to 
                         determine with reasonable prevision the following physical 
                         parameters: inflexion-point height, zi; inflexion point height 
                         wind velocity, ui; mean wind shear in thE CANOPY TOP, sh = 
                         (d<u>/dz)|h; characteristic length scale, Lh = <uh>/sh, where z is 
                         the above surface height. This is useful to obtain above and below 
                         canopy nondimensional wind velocity, u/ui, as a function of a 
                         nondimensional inside canopy depth (z - zi)/Lh. The results for 
                         more than 300 data points seem to confirm the suggestions that the 
                         wind shear in the canopy top and the inflexion point in the wind 
                         velocity vertical profile synthetize the basic informations 
                         concerning the dynamics of turbulent interactions between the flow 
                         above and below the Amazonian forest canopy in Rondonia.",
  conference-location = "Bras{\'{\i}}lia",
      conference-year = "27-29 jul.",
           copyholder = "SID/SCD",
             language = "en",
         organisation = "LBA",
           targetfile = "sa_a general.pdf",
        urlaccessdate = "11 maio 2024"
}