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@Article{FadinaVeBeSiBeSiAl:2019:PaCoMe,
               author = "Fadina, Omotayo Anuoluwapo Fadina and Ven{\^a}ncio, Igor Martins 
                         and Bel{\'e}m, Andr{\'e} and Silveira, Carla Semiramis and 
                         Bertagnolli, Denise de Castro and Silva Filho, Emmanoel Vieira and 
                         Albuquerque, Ana Luiza S.",
          affiliation = "{Universidade Federal Fluminense (UFF)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal Fluminense 
                         (UFF)} and {Universidade Federal Fluminense (UFF)} and 
                         {Universidade Federal Fluminense (UFF)} and {Universidade Federal 
                         Fluminense (UFF)} and {Universidade Federal Fluminense (UFF)}",
                title = "Paleoclimatic controls on mercury deposition in northeast Brazil 
                         since the Last Interglacial",
              journal = "Quaternary Science Reviews",
                 year = "2019",
               volume = "221",
                pages = "105869",
                month = "Oct.",
             keywords = "Mercury variationsMarine sediments, Glacial/interglacial climate, 
                         Millennial-scale events, South American continental margin, 
                         Northeastern Brazil.",
             abstract = "The sediment core GL-1248, collected from the continental slope 
                         off northeastern Brazil, was used to reconstruct mercury (Hg) 
                         variations in NE South American continental margin and understand 
                         its variability in response to paleoclimate changes over the past 
                         128 ka. Mercury concentrations in GL-1248 ranged between 14.95 and 
                         69.43\ ng/g, showing a glacial-interglacial pattern with 
                         higher (lower) concentrations in the glacial period (interglacial 
                         period). Parallel trends of Hg and XRF-Fe plots suggest that 
                         following atmospheric Hg deposition onto the continent, Hg is 
                         incorporated with Fe compounds before transportation and eventual 
                         immobilization at the NE Brazil continental slope. Peaks of Hg and 
                         Fe/Ca ratio peaks occurred concurrently during certain Heinrich 
                         Stadials, indicating that Hg is transported from the continent 
                         alongside fluvial sediments during periods of increased 
                         precipitation and erosion in NE Brazil continent. Mercury 
                         concentrations varied with periodicities of 56 ka and 
                         900\ yr suggesting glacial-interglacial changes and 
                         millennial-scale variability, respectively. Total Hg and total 
                         organic carbon are poorly correlated, although the latter likely 
                         influenced Hg sequestration into marine sediments during 
                         millennial-scale events between 60 ka and 30 ka. Altogether, our 
                         results suggest that the atmosphere is the primary source of Hg to 
                         GL-1248 and glacial-interglacial climate variations were the major 
                         determinant of atmospheric Hg deposition. Furthermore, increased 
                         precipitation during millennial-scale events played a secondary 
                         role by enhancing Hg transport to the continental slope of NE 
                         Brazil.",
                  doi = "10.1016/j.quascirev.2019.10586",
                  url = "http://dx.doi.org/10.1016/j.quascirev.2019.10586",
                 issn = "0277-3791",
             language = "en",
           targetfile = "fadina_paleoclimatic.pdf",
        urlaccessdate = "11 abr. 2021"
}


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