author = "Tourigny, Etienne and Nobre, Carlos Afonso",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Estimation of CO2 emissions from deforestation and land use change 
                         in the Amazon: nested coupling of atmosphere, dynamic vegetation, 
                         LUCC and fire spread models",
            booktitle = "Posters",
                 year = "2010",
         organization = "The Meeting of the Americas.",
            publisher = "AGU",
             keywords = "climate dynamics, earth system modeling, land/atmosphere 
                         interactions, land cover change.",
             abstract = "Deforestation of tropical forests for logging and agriculture, 
                         associated to slash-and-burn practices, is a main contributor of 
                         CO2 emissions, both immediate due to biomass burning and future 
                         due to the elimination of a potential CO2 sink. Moreover, climate 
                         change in the Amazon during the 21st century is projected to 
                         decrease the resilience of the Amazon forest and possibly replace 
                         large parts of tropical forests with savannas, adding to the 
                         direct anthropogenic deforestation. The potential feedbacks 
                         between LUCC (Land-Use and Land-Cover Change) and climate change 
                         are thought to further increase the loss of tropical forests and 
                         increase the rate of CO2 emissions, through mechanisms such as 
                         land and soil degradation and the increase in wildfire occurrence 
                         and severity. However, current understanding of the processes of 
                         fires (including ignition, spread and consequences) in tropical 
                         forests and feedbacks with climate are poorly understood and need 
                         further research. As the processes of LUCC and associated fires 
                         occur at local scales, linking them to large-scale atmospheric 
                         processes requires a means of up-scaling higher resolutions 
                         processes to lower resolutions. Our approach is to couple models 
                         which operate at various spatial and temporal scales: a Global 
                         Climate Model (GCM) (and possibly a Regional Climate Model; RCM), 
                         Dynamic Global Vegetation Model (DGVM) and local-scale LUCC model 
                         and fire behavior model. The climate model(s) resolve larger scale 
                         atmospheric processes and forcings, which are felt by the surface 
                         DGVM and fed-back to the climate. Higher-resolution processes such 
                         as deforestation, land use management and associated (as well as 
                         natural) fires are resolved at the local level. Anthropogenic LUCC 
                         (such as deforestation and pasture burning) is modeled using 
                         Geographical Information Systems (GIS) and spatially-explicit 
                         models. Modifications to the land surface are imposed on the land 
                         model, which has a potential feedback on the land surface 
                         properties through processes resolved by the atmospheric and land 
                         models. Fire behavior is modeled at the regional scale (~100m) to 
                         represent the detailed landscape using semi-empirical or empirical 
                         fire spread models. Improved parametrizations from our 
                         fully-coupled experiments, for use in atmospheric and land surface 
                         models, will allow for a better understanding and evaluation of 
                         CO2 emissions from LUCC and feed-backs with climate change.",
  conference-location = "Foz do Igua{\c{c}}u",
      conference-year = "8-12 Aug. 2010",
             language = "en",
           targetfile = "EtienneTourigny.pdf",
        urlaccessdate = "19 jan. 2021"