@Article{SaatchiAsMaArAnMyNe:2013:PeEfSe,
               author = "Saatchi, S. and Asefi-Najafabady, S. and Malhi, Y. and 
                         Arag{\~a}o, L. E. O. C. and Anderson, Liana Oighenstein and 
                         Myneni, R. B. and Nemani, R.",
          affiliation = "Jet Propulsion Laboratory, California Institute of Technology, 
                         Pasadena, CA 91109, United States; Institute of Environment, 
                         University of California, Los Angeles, CA 90045, United States and 
                         Institute of Environment, University of California, Los Angeles, 
                         CA 90045, United States and Environmental Change Institute, School 
                         of Geography and the Environment, University of Oxford, Oxford OX1 
                         3QY, United Kingdom and College of Life and Environmental 
                         Sciences, University of Exeter, Devon EX4 4RJ, United Kingdom and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and Department 
                         of Geography and Environment, Boston University, Boston, MA 02215, 
                         United States and Biospheric Sciences Branch, National Aeronautics 
                         and Space Administration/Ames Research Center, Moffett Field, CA 
                         94035, United States",
                title = "Persistent effects of a severe drought on Amazonian forest 
                         canopy",
              journal = "Proceedings of the National Academy of Sciences of the United 
                         Sates of America",
                 year = "2013",
               volume = "110",
               number = "2",
                pages = "565--570",
                month = "Jan.",
                 note = "{This article contains supporting information online at 
                         
                         www.pnas.org/lookup/suppl/doi:10.1073/pnas.1204651110/-/DCSupplemental.}",
             keywords = "rain, water, article, canopy, drought, forest, moisture, priority 
                         journal, water content, Brazil, Droughts, Fires, Geographic 
                         Mapping, Microwaves, Radar, Time Factors, Trees, Tropical 
                         Climate.",
             abstract = "Recent Amazonian droughts have drawn attention to the 
                         vulnerability of tropical forests to climate perturbations. 
                         Satellite and in situ observations have shown an increase in fire 
                         occurrence during drought years and tree mortality following 
                         severe droughts, but to date there has been no assessment of 
                         long-term impacts of these droughts across landscapes in Amazonia. 
                         Here, we use satellite microwave observations of rainfall and 
                         canopy backscatter to show that more than 70 million hectares of 
                         forest in western Amazonia experienced a strong water deficit 
                         during the dry season of 2005 and a closely corresponding decline 
                         in canopy structure and moisture. Remarkably, and despite the 
                         gradual recovery in total rainfall in subsequent years, the 
                         decrease in canopy backscatter persisted until the next major 
                         drought, in 2010. The decline in backscatter is attributed to 
                         changes in structure and water content associated with the forest 
                         upper canopy. The persistence of low backscatter supports the slow 
                         recovery (>4 y) of forest canopy structure after the severe 
                         drought in 2005. The result suggests that the occurrence of 
                         droughts in Amazonia at 5-10 y frequency may lead to persistent 
                         alteration of the forest canopy.",
                  doi = "10.1073/pnas.1204651110",
                  url = "http://dx.doi.org/10.1073/pnas.1204651110",
                 issn = "0027-8424",
                label = "scopus",
             language = "en",
           targetfile = "PNAS-2013-Saatchi-565-70.pdf",
                  url = "www.pnas.org/cgi/doi/10.1073/pnas.1204651110",
        urlaccessdate = "28 abr. 2024"
}