@Article{JonesADRAJMNRQ:2019:EnCoRi,
               author = "Jones, Matthew W. and Arag{\~a}o, Luiz Eduardo Oliveira e Cruz de 
                         and Dittmar, Thorsten and Rezende, Carlos E. de and Almeida, 
                         Marcelo G. and Johnson, Ben T. and Marques, Jomar S. J. and 
                         Niggemann, Jutta and Rangel, Thiago P. and Quine, Timothy A.",
          affiliation = "{University of Exeter} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {University of Oldenburg} and {Universidade 
                         Estadual do Norte de Fluminense} and {Universidade Estadual do 
                         Norte de Fluminense} and {Met Office} and {University of 
                         Oldenburg} and {University of Oldenburg} and {Universidade 
                         Estadual do Norte de Fluminense} and {University of Exeter}",
                title = "Environmental controls on the riverine export of dissolved black 
                         carbon",
              journal = "Global Biogeochemical Cycles",
                 year = "2019",
               volume = "33",
               number = "7",
                pages = "849--874",
                month = "July",
             keywords = "Dissolved Organic Carbon, Dissolved Black Carbon, Pyrogenic 
                         Carbon, BC Aerosol, Tropical Rivers.",
             abstract = "Each year, tropical rivers export a dissolved organic carbon (DOC) 
                         flux to the global oceans that is equivalent to similar to 4% of 
                         the global land sink for atmospheric CO2. Among the most 
                         refractory fractions of terrigenous DOC is dissolved black carbon 
                         (DBC), which constitutes similar to 10% of the total DOC flux and 
                         derives from the charcoal and soot (aerosol) produced during 
                         biomass burning and fossil fuel combustion. Black carbon (BC) has 
                         disproportionate storage potential in oceanic pools and so its 
                         export has implications for the fate and residence time of 
                         terrigenous organic carbon (OC). In contrast to bulk DOC, there is 
                         limited knowledge of the environmental factors that control 
                         riverine fluxes of DBC. We thus completed a comprehensive 
                         assessment of the factors controlling DBC export in tropical 
                         rivers with catchments distributed across environmental gradients 
                         of hydrology, topography, climate, and soil properties. 
                         Generalized linear models explained 70 and 64% of the observed 
                         variance in DOC and DBC concentrations, respectively. DOC and DBC 
                         concentrations displayed coupled responses to the dominant factors 
                         controlling their riverine export (soil moisture, catchment slope, 
                         and catchment stocks of OC or BC, respectively) but varied 
                         divergently across gradients of temperature and soil properties. 
                         DBC concentrations also varied strongly with aerosol BC deposition 
                         rate, indicating further potential for deviation of DBC fluxes 
                         from those of DOC due to secondary inputs of DBC from this 
                         unmatched source. Overall, this study identifies the specific 
                         drivers of BC dynamics in river catchments and fundamentally 
                         enhances our understanding of refractory DOC export to the global 
                         oceans.",
                  doi = "10.1029/2018GB006140",
                  url = "http://dx.doi.org/10.1029/2018GB006140",
                 issn = "0886-6236",
             language = "en",
           targetfile = "jones_environmental.pdf",
        urlaccessdate = "27 abr. 2024"
}