@Article{YangSXKCAAKM:2020:InVaCa,
               author = "Yang, Yan and Saatchi, Sassan and Xu, Liang and Keller, Michael 
                         and Corsini, Christianne R. and Arag{\~a}o, Luiz Eduardo Oliveira 
                         e Cruz de and Aguiar, Ana Paula Dutra de and Knyazikhin, Yuri and 
                         Myneni, Ranga B.",
          affiliation = "{University of California} and {University of California} and 
                         {California Institute of Technology} and {Boston University} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Boston University} and {Boston 
                         University}",
                title = "Interannual variability of carbon uptake of secondary forests in 
                         the Brazilian Amazon (2004-2014)",
              journal = "Global Biogeochemical Cycles",
                 year = "2020",
               volume = "34",
               number = "6",
                pages = "e2019GB006396",
                month = "June",
             abstract = "Tropical secondary forests (SF) play an important role in the 
                         global carbon cycle as a major terrestrial carbon sink. Here, we 
                         use high\‐resolution TerraClass data set for tracking land 
                         use activities in the Brazilian Amazon from 20042014 to detect 
                         spatial patterns and carbon sequestration dynamics of secondary 
                         forests (SF). By integrating satellite lidar and radar 
                         observations, we found the SF area in the Brazilian Amazon 
                         increased from approximately 22 Mha (106 ha) in 2004 to 28 Mha in 
                         2014. However, the expansion in area was also accompanied by a 
                         dynamic land use activity that resulted in about 50% recycling of 
                         SF area annually from frequent clearing and abandonment. 
                         Consequently, the average age of SF remained less than 10 years 
                         (age ~8.2 with one standard deviation of 3.2 spatially) over the 
                         period of the study. Estimation of changes of carbon stocks shows 
                         that SF accumulates approximately 8.5 Mg ha\−1 
                         year\−1 aboveground biomass during the first 10 years after 
                         clearing and abandonment, 4.5 Mg ha\−1 year\−1 for 
                         the next 10 years followed by a more gradual increase of 3 Mg 
                         ha\−1 year\−1 from 20 to 30 years with much slower 
                         rate thereafter. The effective carbon uptake of SF in Brazilian 
                         Amazon was negligible (0.06 ± 0.03 PgC year\−1 ) during 
                         this period, but the interannual variability was significantly 
                         larger (±0.2 PgC year\−1 ). If the SF areas were left to 
                         grow without further clearing for 100 years, it would absorb about 
                         0.14 PgC year\−1 from the atmosphere, partially 
                         compensating the emissions from current rate of deforestation in 
                         the Brazilian Amazon.",
                  doi = "10.1029/2019GB006396",
                  url = "http://dx.doi.org/10.1029/2019GB006396",
                 issn = "0886-6236",
             language = "en",
           targetfile = "10.1029@2019GB006396.pdf",
        urlaccessdate = "28 abr. 2024"
}