@InProceedings{PedruzoBagazgoitiaMOGMMPSSYA:2021:UnAnAb,
               author = "Pedruzo Bagazgoitia, Xabier and Moene, Arnold F. and Ouwersloot, 
                         Huug and Gerken, Tobias and Machado, Luiz Augusto Toledo and 
                         Martin, Scot T. and Patton, Edward G. and S{\"o}rgel, Matthias 
                         and Stoy, Paul C. and Yamasoe, Marcia A. and Arellano, Jordi 
                         Vil{\`a}-Guerau de",
          affiliation = "{Wageningen University and Research} and {Wageningen University 
                         and Research} and {Wageningen University and Research} and {James 
                         Madison University} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Harvard University} and {National Center for 
                         Atmospheric Research} and {Max Plank Institute for Chemistry} and 
                         {University of Wisconsin– Madison} and {Universidade de S{\~a}o 
                         Paulo (USP)} and {Wageningen University and Research}",
                title = "Understanding in and above canopy-atmosphere interactions by 
                         combining large-eddy simulations with a comprehensive 
                         observational set",
                 year = "2021",
         organization = "EGU General Assembly",
            publisher = "EGU",
             abstract = "The vegetated canopy plays a key role in regulating the surface 
                         fluxes and, therefore, the global energy, water and carbon cycles. 
                         In particular, vulnerable ecosystems like the Amazonia basin can 
                         be very sensitive to changes in vegetation that exert subsequent 
                         shifts in the partition of the energy, water and carbon in and 
                         above the canopy. Despite this relevance, most 3D atmospheric 
                         models represent the vegetated canopy as a flat 2D layer with, at 
                         most, a rough imitation of its effect in the atmospheric boundary 
                         layer through a modified roughness length. Thus, the 
                         representations often describe quite crudely the surface fluxes. 
                         In this work, particular emphasis is placed in the biophysical 
                         processes that take place within the canopy and its impact above. 
                         Our approach is to represent the coupling of the flow between the 
                         canopy and the atmosphere including the following processes: 
                         radiative transfer, photosynthesis, soil evaporation and CO2 
                         respiration, combined with the mostly explicit atmospheric 
                         turbulence within and above the canopy. To this end, we 
                         implemented in LES a detailed multi-layer canopy model that solves 
                         the leaf energy balance for sunlit and shaded leaves 
                         independently, regulating the exchange of heat, moisture and 
                         carbon between the leaves and the air around. This allows us to 
                         connect the mechanistically represented processes occurring at the 
                         leaf level and strongly regulated by the transfer of diffuse and 
                         direct radiation within the canopy to the turbulent mixing 
                         explicitly resolved at the meter scale. We test and validate this 
                         combined photosynthesis-turbulence-canopy model by simulating a 
                         representative clear day transitioning to shallow cumulus. We 
                         based our evaluation on observations by the GoAmazon2014/5 
                         campaign in Brazil in 2014. More specifically, we systematically 
                         validate the in-canopy radiation profiles; sources, sinks and 
                         turbulent fluxes of moisture, heat and CO2, and main state 
                         variables within the canopy, and also study the effects of these 
                         in the air above. Preliminary results show an encouraging 
                         satisfactory match to the observed evolution of the profiles. As a 
                         first exploration and demonstration of the capabilities of the 
                         model, we test the effects of a coarser in-canopy resolution, a 
                         different radiation scheme and the use of a more simple 2D canopy 
                         representation.",
  conference-location = "Online",
      conference-year = "19-30 apr.",
                  doi = "10.5194/egusphere-egu21-12869",
                  url = "http://dx.doi.org/10.5194/egusphere-egu21-12869",
             language = "en",
           targetfile = "EGU21-12869-print.pdf",
        urlaccessdate = "20 maio 2024"
}