@InProceedings{CamposCPMKPVACB:2019:NeInAb,
               author = "Campos, Mar{\'{\i}}lia de Carvalho and Chiessi, Cristiano M. and 
                         Prange, Matthias and Mulitza, Stefan and Kuhnert, Henning and 
                         Paul, Andre and Venancio, Igor Martins and Albuquerque, Ana Luiza 
                         and Cruz, Francisco William and Bahr, Andr{\'e}",
          affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Universidade de 
                         S{\~a}o Paulo (USP)} and {University of Bremen} and {University 
                         of Bremen} and {University of Bremen} and {University of Bremen} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal Fluminense (UFF)} and {Universidade de 
                         S{\~a}o Paulo (USP)} and {University of Heidelberg}",
                title = "New insights about millennial-scale positive precipitation 
                         anomalies over tropical South America",
                 year = "2019",
         organization = "AGU Fall Meeting",
             abstract = "Heinrich Stadials (HS) are cold Northern Hemisphere abrupt 
                         millennial-scale events frequently related to decreases in the 
                         strength of the Atlantic meridional overturning circulation 
                         (AMOC). Model simulations and paleoclimate records indicate that 
                         the reduction in oceanic heat transport to the Northern Hemisphere 
                         during periods of weak AMOC cools down the North Atlantic and 
                         warms up the South Atlantic. This perturbation in the 
                         cross-equatorial heat transport would in turn affect tropical 
                         rainfall. Indeed, South American hydroclimate records indicate 
                         marked precipitation anomalies during HS of the last glacial 
                         period. However, the scarcity of high-resolution marine records 
                         off South America, especially between 7 and 20°S, hampers a 
                         mechanistic understanding of tropical South American hydroclimate 
                         responses to HS. Here we investigate piston core M125-95-3 
                         collected at 10.95°S from a site influenced by the terrigenous 
                         discharge of the S{\~a}o Francisco River, eastern South America, 
                         for the last ca. 70,000 years. In order to reconstruct changes in 
                         precipitation over the S{\~a}o Francisco River drainage basin we 
                         determined the major elemental composition along the piston core. 
                         To gain mechanistic insights into tropical South American 
                         hydroclimate changes we analyzed a HS-simulation with a 
                         high-resolution version of the atmosphere-ocean general 
                         circulation model CCSM3. Our new elemental record shows marked 
                         increases in S{\~a}o Francisco River sediment discharge to the 
                         eastern South Atlantic during HS. It is the southernmost marine 
                         paleoclimate record off eastern South America that unequivocally 
                         records the HS of the last glacial period. Additionally, our 
                         high-resolution model output allows new insights into the drivers 
                         of changes in South American hydroclimate during HS.",
  conference-location = "San Francisco, CA",
      conference-year = "09-13 dec.",
             language = "en",
           targetfile = "campos_new.pdf",
        urlaccessdate = "26 abr. 2024"
}