@Article{CorreiaAlvaManz:2007:ReClMo,
               author = "Correia, F. W. and Alval{\'a}, R. C. and Manzi, Antonio Ocimar",
          affiliation = "State University of Amazonas (UEA), Manaus, AM, Brazil and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)} and 
                         National Institute for Amazonia Research (INPA), Manaus, AM, 
                         Brazil",
                title = "Modeling the impacts of land cover change in Amazonia: a regional 
                         climate model (RCM) simulation study",
              journal = "Theoretical and Applied Climatology",
                 year = "2007",
               volume = "93",
               number = "3-4",
                pages = "225--244",
                month = "Jan.",
             keywords = "Amazonia, deforestation, GCM, eta, SSiB.",
             abstract = "The numerical regional model (Eta) coupled with the Simplified 
                         Simple Biosphere Model (SSiB) was used to investigate the impact 
                         of land cover changes on the regional climate in Amazonia. Four 
                         13-month integrations were performed for the following scenarios: 
                         (a) no deforestation, (b) current conditions, (c) deforestation 
                         predicted for 2033, and (d) large scale deforestation. Ali initial 
                         and prescribed boundary conditions were kept identical for ali 
                         integrations, except the )and cover changes. The results show that 
                         during the dry season the post-deforestation decrease in root 
                         depth plays an important role in the energy budget, since lo there 
                         is less soil moisture available for evapotranspiration. In ali 
                         scenarios there was a significant increase in the surface 
                         temperature, from 2.0°C in the first scenario, up to 2.8°C in the 
                         last one. In both the scenarios (b) and (c), the downward 
                         component of the surface solar radiation decreased due to an 
                         increase in the cloud cover over deforested areas, which 
                         contributed to even further reduction of the net radiation 
                         absorbed at the surface. The cloud mechanism, where an increase in 
                         albedo is balanced by an increase in downward solar radiation, was 
                         not detected in any of these scenarios. In scenarios (a), (b) and 
                         (c), a negative feedback mechanism was observed in the 
                         hydrological cycle, with greater amounts of moisture being carried 
                         to the deforested areas. The increase in moisture convergente was 
                         greater than the reduction in evapotranspiration for both 
                         scenarios (b) and (c). This result and the meso-scale 
                         thermodynamic processes caused an increase in precipitation. A 
                         different situation was observed in the large-scale deforestation 
                         scenario (d): a local increase of moisture convergente was 
                         observed, but not sufficiently intense to generate an increase in 
                         precipitation; so, the local evapotranspiration decrease was 
                         dominant in this scenario. Therefore, partia) deforestation in 
                         Amazonia can actually lead to an increase in precipitation 
                         locally. However, if the deforestation increases, this condition 
                         becomes unsustainable,leading to drier conditions and, 
                         consequently, to reduced precipitation in the region.",
           copyholder = "SID/SCD",
                  doi = "10.1007/s00704-007-0335-z",
                  url = "http://dx.doi.org/10.1007/s00704-007-0335-z",
                 issn = "0177-798X",
             language = "en",
           targetfile = "Correia et al - 0-335-1.pdf",
        urlaccessdate = "03 maio 2024"
}