@InProceedings{PachecoMNAKDRMXDWEGHMK:2002:StMeWi,
               author = "Pacheco, Vanusa Bezerra and Marques Filho, Ari and Nobre, Antonio 
                         Donato and Araujo, Alessandro Donado de and Kruijt, Bart and 
                         Dallarosa, Ricardo G. and Randow, Celso von and Manzi, antonio 
                         Ocimar and Xavier, Hermes Braga and Dolman, Albertos Johannes and 
                         Waterloo, Maarten Johannes and Elbers, Jan Albert and Gash, John 
                         Handescombe C. and Hodnett, Martin George and Moors, Johannes Eddy 
                         and Kabat, Pavel",
                title = "Study of the mean wind speed profile above and within the canopy 
                         of the forest reserve Cuieiras in Central Amazonia",
                 year = "2002",
         organization = "International LBA Scientific Conference, 2.",
             keywords = "METEOROLOGIA.",
             abstract = "The vertical mean wind speed profile was studied utilizing data 
                         measured from a 50 m micrometeorological tower in forest reserve 
                         Cuieiras - ZF2, km 34 (2o36'32, 7{"}S, 60o12'33,48{"}W)some 60 km 
                         north of Manaus, in Central Amazonia. The measurements of wind 
                         speed were made at four heights (two above the canopy and two 
                         within the canopy)using cup anemometers logged at 30 seconds 
                         intervals. The data represent the period from June to November 
                         2001. To perform the vertical mean wind speed profile analysis of 
                         30 min averages were used. The mean wind speed profile data 
                         obtained during early morning (00:00 to 06:30 local time (LT)), 
                         day (07:00 to 17:30 LT)and night (18:00 to 23:30 LT)were compared 
                         with the vertical temperature and CO2 concentration profiles. A 
                         least squares fitting technique was used to fit polynomial curves 
                         to the vertical mean wind speed profile using Matlab-5 computer 
                         code. For the mean wind speed profile data the best fit was 
                         obtained using third degree polynomial functions. The highest wind 
                         speeds occur between 10:00 and 16:00 LT, which corresponds well 
                         with the maximum air temperatures, usually between 12:00 and 15:00 
                         LT. CO2 concentrations begin to decrease soon after 08:00 LT and 
                         increase soon after 17:30 LT. The period from 10:00 to 16:00 HL, 
                         when the maximum values of mean wind speed occur is also the 
                         period of major convective activity, caused by atmospheric 
                         instability associated with the diurnal solar cycle. The rate of 
                         decrease in mean wind below the canopy was shown to be related to 
                         the density profile of the foliage.",
  conference-location = "Manaus, Br",
      conference-year = "7-10 July 2002",
                label = "10230",
           targetfile = "9311.pdf",
        urlaccessdate = "11 maio 2024"
}