@InProceedings{HerrmannFreiChat:2004:RoCoSy,
               author = "Herrmann, Valdir Inacio and Freitas, Saulo Ribeiro de and 
                         Chatfield, Robert",
          affiliation = "{CPTEC-INPE-Cachoeira Paulista-12630-000-SP-Brasil}",
                title = "Atmospheric CO2 budget over Amazon basin: the role of the 
                         convective systems",
            booktitle = "Anais...",
                 year = "2004",
         organization = "Conferencia Cientifica do LBA, 3.",
             abstract = "This work studies the CO2 budget in the atmosphere on Amazon basin 
                         focusing the role of the shallow and deep convective systems. The 
                         vertical redistribution of the CO2 by these systems is numerically 
                         simulated using a Eulerian transport model coupled to a regional 
                         atmospheric model (RAMS). The transport model includes advection 
                         at grid scale, diffusion in the planetary boundary layer (PBL) and 
                         convective transport by sub-grid shallow and deep moist 
                         convection. We explore also two different approaches for the CO2 
                         biogenic surface fluxes. The simulation is carried out with 6 
                         tracers whose mass conservation equation is resolved including or 
                         not the moist convective deep and shallow transport. In that way, 
                         the role of these systems is clearly showed. The rectifier effect 
                         is also depicted through the transport to the free troposphere of 
                         PBL air masses with low CO2 concentration due to activity of 
                         assimilation by the vegetation in the period between the noon and 
                         end of the afternoon, when this process and the convective 
                         activity are in the apex. The model is applied to July 2001 with a 
                         30 km grid resolution covering the north portion of the South 
                         America. For this case, we compare the model results with CO2 
                         observations collected on Amazon basin during CLAIRE experiment.",
  conference-location = "Brasilia",
      conference-year = "27-29 jul.",
           copyholder = "SID/SCD",
             language = "en",
         organisation = "LBA",
           targetfile = "atmospheric_freitas.pdf",
        urlaccessdate = "23 abr. 2024"
}